Battery device and electric apparatus

Abstract

A battery device (200) and an electric apparatus (300). The battery device (200) comprises: a box housing (201) in which an accommodating space (230) is formed; a battery module (100) arranged in the accommodating space (230), wherein the battery module (100) comprises battery cells (140), which are arranged as a square structure, at least two battery cells (140) are stacked in a first direction (X), the first direction (X) is consistent with the direction of thickness of the battery cells (140) and the direction of height of the box housing (201), the thickness of each battery cell (140) is less than the length and width thereof, and each battery cell (140) comprises a terminal post structure (144); and a structural member fixed on at least one surface of the battery module (100), wherein the structural member keeps clear of the terminal post structure (144). The battery cells (140) are mounted flat, thereby improving the space utilization rate and the energy density of the battery device (200).

Description

Battery device and electric appliance TECHNICAL FIELD

[0001] The present application relates to the technical field of battery design and manufacturing, in particular to a battery device and an electric appliance. BACKGROUND

[0002] The battery device generally includes a plurality of battery monomers, and the plurality of battery monomers are vertically assembled in a box body and electrically connected in series, in parallel, or in a mixed manner.

[0003] In the scenario of a commercial vehicle, the battery device adopts a vertical installation mode to place (also referred to as "upright") battery monomers, which has a high height, thereby causing the overall height of the battery device to be high. If the battery monomers are placed upright, the space utilization rate of the box shell of the battery device is not high.

[0004] SUMMARY

[0005] The purpose of the embodiments of the present application is to provide a battery device and an electric appliance, which can solve the problem that the battery monomers in the battery device applied to a commercial vehicle are assembled in a vertical installation mode, causing low space utilization rate of the box shell and being not conducive to improving the energy density of the battery device.

[0006] The technical solution adopted by the embodiments of the present application is as follows:

[0007] According to a first aspect of the present application, a battery device is provided, which includes:

[0008] a box shell, which forms an accommodation space;

[0009] a battery module, which is arranged in the accommodation space; wherein

[0010] the battery module includes:

[0011] battery monomers, which are arranged in a square structure, and at least two battery monomers are arranged in a stacked manner in a first direction, the first direction being consistent with the thickness direction of the battery monomers and the height direction of the box shell, wherein the thickness of the battery monomers is less than the length and the width of the battery monomers, and the battery monomers include a pole structure;

[0012] a structural member, which is fixed to at least one surface of the battery module, and the structural member avoids the pole structure.

[0013] In the battery device provided by the present application, the battery monomers are installed in a lying installation mode, which can more reasonably utilize the limited assembly space of the box shell, improve the space utilization rate, and be conducive to improving the energy density of the battery device, compared with the vertical assembly of the battery monomers in the related art.

[0014] In some embodiments of the present application, the structural member comprises a first layer plate and a second layer plate, the first layer plate and the second layer plate are respectively arranged on the uppermost surface and the lowermost surface of the battery module, and the first layer plate and the second layer plate clampingly fix the battery monomer, wherein the plate surfaces of the first layer plate and the second layer plate are perpendicular to the first direction. In the process of using the battery device, compared with the vertical assembly of the battery monomer, the number of the battery monomers in the first direction is reduced, so that the expansion force in the first direction is reduced, thereby the battery device is not easy to be damaged, and the service life of the battery device is improved.

[0015] In some embodiments of the present application, the structural member further comprises at least one intermediate layer plate, the intermediate layer plate is arranged between the first layer plate and the second layer plate, and the upper and lower sides of the intermediate layer plate are both provided with the battery monomer. The intermediate layer plate can reduce the stress of the direct abutting contact between the battery monomers, which is beneficial to protect the battery monomer.

[0016] In some embodiments of the present application, the structural member further comprises a partition plate, the two ends of the partition plate are respectively connected to the first layer plate and the second layer plate, the plate surface of the partition plate is arranged in parallel to the first direction, the first layer plate, the second layer plate and the partition plate form a first mounting space and a second mounting space, the battery monomers are arranged in layers in the first mounting space and the second mounting space, and the battery monomers abut against the partition plate. Compared with the vertical assembly of the battery monomer in the related art, the battery monomer is installed in a lying installation mode, which can more reasonably utilize the limited assembly space of the box shell, improve the space utilization rate, and is beneficial to improve the energy density of the battery device.

[0017] In some embodiments of the present application, the battery monomers located in the first mounting space and the battery monomers located in the second mounting space are symmetrically arranged relative to the partition plate, and the pole structure is arranged on the surface of the battery monomer away from the partition plate. In this way, the limited assembly space of the box shell can be more reasonably utilized, the space utilization rate is improved, and the energy density of the battery device is beneficial to improve.

[0018] In some embodiments of the present application, in the first mounting space and the second mounting space, a plurality of battery monomers are arranged in a layer along a second direction in sequence, and a plurality of layers are stacked along the first direction, wherein the second direction is perpendicular to the first direction and parallel to the plate surface of the partition plate. In this way, the limited assembly space of the box shell can be more reasonably utilized, the space utilization rate is improved, and the energy density of the battery device is beneficial to improve.

[0019] In some embodiments of the present application, the structural member further comprises a stay, the two ends of the stay are respectively connected to the edges of the first layer plate and the second layer plate. The stay pulls the first layer plate and the second layer plate relative to each other to further clamp the battery monomer, so that the battery monomer can be stably positioned in the first mounting space and the second mounting space.

[0020] In some embodiments of the present application, the shoulder of two adjacent battery monomers in the second direction is pressed by one pull strip at the same time. In this way, not only the number of pull strips used can be minimized, but also the restriction of the pull strip on the battery monomer is more stable.

[0021] In some embodiments of the present application, a structural adhesive is provided between the pull strip and the battery monomer. The structural adhesive can prevent the battery monomer from being in conduction short circuit with the pull strip, protect the use safety of the battery monomer, and make the pull strip and the battery monomer not directly rigidly contact, reduce the extrusion damage of the pull strip to the battery monomer, and protect the integrity of the battery monomer.

[0022] In some embodiments of the present application, one end of the pull strip and the edge of the first layer plate, and the other end of the pull strip and the edge of the second layer plate are connected by bolts or welding, which reduces the difficulty of assembling the pull strip, and easy assembly makes the assembly efficiency of the pull strip high.

[0023] In some embodiments of the present application, the intermediate layer plate includes a liquid cooling plate; at least one liquid cooling plate is provided between any two adjacent layers of battery monomers; or the upper and lower sides of the liquid cooling plate are provided with multiple layers of battery monomers. In this way, each battery monomer can be kept in a stable working temperature range, that is, the working temperature of the whole battery module is always kept in a suitable temperature range, so that the battery module can always be normally charged and discharged.

[0024] In some embodiments of the present application, the first layer plate is provided with a first liquid cooling flow channel for cooling liquid flow; and / or the second layer plate is provided with a second liquid cooling flow channel for cooling liquid flow. In this way, the working temperature of the whole battery module can be kept in a suitable temperature range, further making the battery module always normally charged and discharged.

[0025] In some embodiments of the present application, the partition plate is provided with a third liquid cooling flow channel for cooling liquid flow. In this way, the working temperature of the whole battery module can be kept in a suitable temperature range, further making the battery module always normally charged and discharged.

[0026] In some embodiments of the present application, a structural adhesive is provided between the surface of the battery monomer facing the partition plate and the partition plate. The structural adhesive not only can prevent the battery monomer from being in conduction short circuit with the partition plate, protect the use safety of the battery monomer, but also has a flexible buffering effect, so that the partition plate does not directly rigidly contact the end wall of the battery monomer.

[0027] In some embodiments of the present application, structural glue is arranged 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 glue not only prevents the battery cell from being in conduction short circuit with the first layer plate and the second layer plate, thereby protecting the use safety of the battery cell, but also has a flexible buffering effect, so that the first layer plate and the second layer plate do not directly rigidly contact the battery cell.

[0028] In some embodiments of the present application, the first layer plate and the partition plate are connected by bolts or welding, and / or the second layer plate and the partition plate are connected by bolts or welding, thereby reducing the assembly difficulty and facilitating the assembly, so that the assembly efficiency is high.

[0029] In some embodiments of the present application, the box shell includes a box body and a cover body, the cover body covers the box body to form a containing space, the bottom of the box body is provided with a bearing beam, and any opposite edge region formed by the structural member in the battery module is arranged in one-to-one correspondence with the bearing beam. In this way, the bottom of the box body will not be deformed under the extrusion of the weight of the battery module, and the integrity of the box body is maintained.

[0030] In some embodiments of the present application, the bearing beam extends along the length direction of the box shell.

[0031] In some embodiments of the present application, the bottom of the box body is provided with a reinforcing beam, the two ends of the reinforcing beam are respectively connected to the opposite two bearing beams, and the reinforcing beam abuts against the bottom of the box body. In this way, the reinforcing beam and the bearing beam together bear the battery module, and the structural strength of the bottom of the box body is greatly improved.

[0032] In some embodiments of the present application, structural glue is arranged between the surface of the battery module facing the bottom of the box body and the bottom of the box body, thereby improving the integrity of the battery device.

[0033] In some embodiments of the present application, the battery module is arranged in multiple, and the multiple battery modules are arranged in sequence in the direction perpendicular to the first direction.

[0034] According to a second aspect of the present application, a power consuming device is provided, which includes the battery device as described above. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0036] FIG. 1 is an exploded schematic view of a battery device provided by an embodiment of the present application;

[0037] Fig. 2 is an exploded schematic view of the bottom part between the battery module and the box body in the battery device provided by the embodiment of the present application;

[0038] Fig. 3 is an enlarged schematic view of B in Fig. 2;

[0039] Fig. 4 is a structural schematic view of the battery cell adopted by the battery module in the battery device provided by the embodiment of the present application;

[0040] Fig. 5 is a structural schematic view of the assembly of the battery module in the battery device provided by the embodiment of the present application;

[0041] Fig. 6 is an enlarged schematic view of A in Fig. 5;

[0042] Fig. 7 is an exploded schematic view of the battery module in the battery device provided by the embodiment of the present application;

[0043] Fig. 8 is a structural schematic view of the battery module in which the first mounting space and the second mounting space are only paved with one layer of battery cells provided by the embodiment of the present application;

[0044] Fig. 9 is a structural schematic view of the power consumption equipment provided by the embodiment of the present application.

[0045] In the figures, the various reference signs are:

[0046] 100, battery module;

[0047] 110, first layer plate; 111, first liquid cooling flow channel; 120, second layer plate; 121, second liquid cooling flow channel; 130, partition plate; 131, first mounting space; 132, second mounting space; 133, third liquid cooling flow channel; 140, battery cell; 141, circumferential side wall; 142, end wall; 143, pressure relief structure; 144, pole structure; 150, stay; 160, middle layer plate; 161, first liquid cooling plate; 162, second liquid cooling plate;

[0048] 200, battery device;

[0049] 201, box shell; 210, box body; 211, bottom part; 220, cover body; 230, containing space; 240, bearing beam; 250, reinforcing beam;

[0050] 300, power consumption equipment; 301, vehicle frame; 302, drive motor; 303, wheel;

[0051] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0052] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application and not to limit the present application.

[0053] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "first", "second" are only for the purpose of convenient description, and cannot be understood as indicating or implying relative importance or implying the number of technical features. The meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0054] In order to illustrate the technical solutions provided by the present application, the following will be described in detail with reference to the specific drawings and embodiments.

[0055] At present, new energy, that is, renewable energy, plays an increasingly important role in social development, and the application and popularization of new energy are also developing rapidly. New energy includes but is not limited to solar energy, wind energy, geothermal energy, tidal energy, etc. These renewable energy sources are converted into electrical energy that is easy to store and easy to use, and are applied to various industries through electrical energy output. In order to store the electrical energy converted from renewable energy, new energy batteries are needed, which include but are not limited to lithium batteries, nickel-hydrogen batteries, lead-acid batteries, etc. Among them, lithium batteries have more outstanding advantages than other types of batteries, therefore, various enterprises, institutions, research institutes, etc. are vigorously developing lithium batteries. Hereinafter, new energy batteries are collectively referred to as battery devices.

[0056] Generally, a battery device includes at least one battery monomer, wherein most battery devices are equipped with a plurality of battery monomers to meet the demand for large amounts of electricity. Hereinafter, the battery device is described by way of example with a plurality of battery monomers assembled. The plurality of battery monomers are electrically connected in parallel, in series, or in a combination of series and parallel, thereby outputting electrical energy with the required output voltage and output current.

[0057] In the context of commercial vehicles, battery monomers placed in a vertical installation mode (also referred to as "upright") have a high height, which in turn results in a high overall height of the battery device. If the battery monomers are placed upright, the space utilization rate is not high.

[0058] In the battery monomer vertical installation mode, for example, a square battery monomer includes four side walls and two end walls, the four side walls include two opposite larger side walls (i.e., larger side walls) and two opposite smaller side walls (i.e., smaller side walls), in the assembled battery device, the two end walls of each battery monomer are respectively directed to the bottom and the top of the box, the arrangement direction of the bottom and the top of the box is the height direction of the box, the length direction and the width direction of the box are perpendicular to the height direction. Two larger side walls of adjacent two battery monomers are abutted and assembled, a plurality of battery monomers are arranged along the length direction or the width direction of the box, and the expansion of the larger side walls of the plurality of battery monomers is accumulated in the length direction or the width direction.

[0059] Based on the above considerations, the battery device provided in the present application uses a lying installation mode to install the battery monomer, which can more reasonably utilize the limited assembly space of the box shell, improve the space utilization, and is conducive to improving the energy density of the battery device, compared with the vertical installation mode of the battery monomer. Further, the power consumption equipment provided in the present application uses the battery device provided in the present application to supply power to the power consumption load of the power consumption equipment, so that the power consumption equipment can normally operate.

[0060] In order to illustrate the technical solutions provided in the present application, the following will be described in detail in combination with specific drawings and embodiments.

[0061] According to a first aspect of the present application, a battery device 200 is provided, as shown in FIGS. 1, 2, 5-7, the battery device 200 includes a box shell 201 and a battery module 100, the box shell 201 forms an accommodation space 230, and the battery module 100 is arranged in the accommodation space 230. The battery module 100 includes a battery monomer 140 and a structure, the battery monomer 140 is arranged in a square structure, at least two battery monomers 140 are arranged in a first direction X, the first direction X is consistent with the thickness direction of the battery monomer 140 and the height direction of the box shell 201, and the thickness of the battery monomer 140 is smaller than the length and the width of the battery monomer 140, and the battery monomer 140 includes a pole structure 144. The structure is fixed on at least one surface of the battery module 100, and the structure avoids the pole structure 144.

[0062] The battery monomer is installed in a lying manner, that is, the battery monomers of at least two square structures are arranged in the first direction X, the first direction X is consistent with the thickness direction of the battery monomer 140 and the height direction of the box shell 201, and the thickness of the battery monomer 140 is smaller than the length and the width of the battery monomer 140.

[0063] In the battery device 200 provided in the application, the battery monomer 140 is installed in a lying manner, that is, the battery monomers of at least two square structures are arranged in the first direction X, the first direction X is consistent with the thickness direction of the battery monomer 140 and the height direction of the box shell 201, and the thickness of the battery monomer 140 is smaller than the length and the width of the battery monomer 140. Compared with the vertical installation of the battery monomer in the related art, the installation of the battery monomer 140 in the lying manner can more reasonably utilize the limited installation space of the box shell 201, improve the space utilization, and be beneficial to improving the energy density of the battery device 200.

[0064] As shown in FIG. 4, the battery monomer 140 has a circumferential side wall 141 and two end walls 142 connected to both ends of the circumferential side wall 141, forming a shell. The battery monomer 140 has a pressure relief structure 143 and a pole structure 144, the pressure relief structure 143 is used for discharging the gas pressure inside the battery monomer 140, and the pole structure 144 is used as an electrode terminal connected to the outside of the battery monomer 140. The pressure relief structure 143 can be installed on one of the end walls 142, the pole structure 144 can be installed on one of the end walls 142, and the pressure relief structure 143 and the pole structure 144 can be installed on the same end wall 142, or the pressure relief structure 143 and the pole structure 144 can be installed on the two end walls 142 respectively.

[0065] The pressure relief structure 143 refers to an element or component that is actuated to release the internal pressure when the internal pressure or temperature of the battery monomer 140 reaches a predetermined threshold. The "actuated" refers to the action of the pressure relief structure 143, so that the internal pressure and temperature of the battery monomer 140 can be released from the exhaust passage. The action of the pressure relief structure 143 can include but is not limited to: at least a part of the pressure relief structure 143 is broken, torn or melted, etc. After the pressure relief structure 143 is actuated, the high-temperature smoke in the battery monomer 140 can be discharged from the exhaust passage of the pressure relief structure 143. The predetermined threshold can be adjusted according to different design requirements. The predetermined threshold can depend on the material of one or more of the positive plate, the negative plate, the electrolyte and the separator in the battery monomer 140. The pressure relief structure 143 can use elements or components that are sensitive to pressure or temperature, that is, when the internal pressure or temperature of the battery monomer 140 reaches a predetermined threshold, the pressure relief structure 143 is actuated, thereby forming a channel for internal pressure relief.

[0066] As shown in FIG. 1, in some embodiments of the present application, the box shell 201 includes a box body 210 and a cover body 220, the cover body 220 covers the box body 210 to form a containing space 230, and the battery module 100 is installed in the containing space 230. In the battery device 200, the battery module 100 is a complete module, that is, the battery module 100 has been assembled into an independent complete module before being assembled into the containing space 230 of the box shell 201, and then the battery module 100 is placed into the box body 210 as a whole, and then the cover body 220 is covered. That is, the box body 210, the battery module 100 and the cover body 220 are modularly assembled, which greatly improves the assembly production efficiency of the assembled battery device 200.

[0067] In some embodiments of the present application, as shown in FIGS. 5 to 7, the structure includes a first layer plate 110 and a second layer plate 120, and the first layer plate 110 and the second layer plate 120 are respectively arranged on the uppermost surface and the lowermost surface of the battery module 100, that is, the first layer plate 110 and the second layer plate 120 are oppositely arranged and clampingly fix the battery monomer 140. The plate surface of the first layer plate 110 and the plate surface of the second layer plate 120 are both perpendicular to the first direction X. In the battery module 100, the first layer plate 110 and the second layer plate 120 are respectively assembled towards the bottom and the top of the box body 210 of the battery device 200. During the use of the battery device 200, compared with the vertical assembly of the battery monomer, the number of the battery monomers 140 along the first direction X is reduced, so that the expansion force along the first direction X is reduced, thereby preventing the battery device 200 from being damaged and improving the service life of the battery device 200.

[0068] In some embodiments of the present application, as shown in FIGS. 6-8, the structural member further comprises a partition plate 130, two ends of the partition plate 130 are connected to the first layer plate 110 and the second layer plate 120 respectively, the plate surface of the partition plate 130 is arranged in parallel with the first direction X, and the plane in which the plate surface of the partition plate 130 is arranged is perpendicular to the plane in which the plate surface of the first layer plate 110 is arranged and the plane in which the plate surface of the second layer plate 120 is arranged. The first layer plate 110, the second layer plate 120 and the partition plate 130 form a first mounting space 131 and a second mounting space 132, the battery monomers 140 are arranged in layers in the first mounting space 131, and the battery monomers 140 are also arranged in layers in the second mounting space 132, the arrangement direction of the two end walls 142 of each battery monomer 140 (i.e. the length direction of the battery monomer 140) is perpendicular to the plate surface of the partition plate 130, one end wall 142 of the battery monomer 140 abuts against the partition plate 130 (i.e. the battery monomer 140 abuts against the partition plate 130), the other end wall 142 of the battery monomer 140 is provided with a pole structure 144, the pole structure 144 is in an exposed state in the battery module 100 to facilitate subsequent wiring assembly, and the first layer plate 110 and the second layer plate 120 clampingly fix the layered battery monomers 140. The first layer plate 110, the second layer plate 120 and the partition plate 130 of the present application are assembled and formed into a "H-shaped" load-bearing structure, and form the first mounting space 131 and the second mounting space 132, and the plurality of battery monomers 140 are installed in the first mounting space 131 and the second mounting space 132 in a lying manner. Compared with the vertical assembly of the battery monomers in the related art, the battery monomers 140 are installed in a lying manner, which can more reasonably utilize the limited assembly space of the box shell 201, improve the space utilization, and is conducive to improving the energy density of the battery device 200. Moreover, the first layer plate 110 and the second layer plate 120 clampingly fix the battery monomers 140, that is, the larger side wall of the circumferential side wall 141 of the battery monomer 140 is in the first direction X. Compared with the vertical assembly of the battery monomers, the height of the battery module 100 remains unchanged (i.e. the height of the battery module 100 is about the height of the vertically assembled battery monomers), due to the reduction in the number of battery monomers 140 along the first direction X, the expansion force along the first direction X is reduced, so that the battery module 100 is not easily damaged, and the service life is improved.

[0069] In some embodiments of the present application, as shown in FIGS. 5 and 7, the battery cells 140 located in the first installation space 131 are symmetrically arranged with the battery cells 140 located in the second installation space 132 relative to the partition plate 130. In this way, the first installation space 131 and the second installation space 132 can be effectively utilized, so that the battery cells 140 are arranged compactly in the first installation space 131 and the second installation space 132, and a larger number of battery cells 140 can be assembled in a limited space. For a space of a certain size and shape, when objects are placed in the space, the number of objects placed in the space will be different when the objects are placed in different positions and states in the space, which will result in different space utilization. In this way, the energy density of the battery module 100 can be greatly improved without increasing the volume of the battery module 100.

[0070] As shown in FIGS. 5 to 7, in some embodiments of the present application, in the first installation space 131, a plurality of battery cells 140 are arranged in sequence along the second direction Y to form a layer, and a plurality of layers are stacked along the first direction X. In the second installation space 132, a plurality of battery cells 140 are arranged in sequence along the second direction Y to form a layer, and a plurality of layers are stacked along the first direction X. The second direction Y is perpendicular to the first direction X and parallel to the plate surface of the partition plate 130. The second direction Y is parallel to the plate surface of the partition plate 130, parallel to the plate surface of the first layer plate 110, and parallel to the plate surface of the second layer plate 120. In this way, the battery module 100 after forming is flat as a whole, and at this time, the main expansion force of the battery module 100 during charging and discharging is the expansion force of the larger side wall of a layer of battery cells 140 in the first installation space 131 and the expansion force of the larger side wall of a layer of battery cells 140 in the second installation space 132. Since the two larger side walls 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 side wall can be offset, so that the battery cell 140 remains stable and does not deform. Compared with the vertical assembly of battery cells, the number of layers of battery cells 140 along the first direction X is significantly less than the number of a row of battery cells in a vertical assembly structure, so that the cumulative expansion force of the battery module 100 along the first direction X is reduced, and thus the battery module 100 is not easily damaged, thereby improving the service life.

[0071] In some embodiments of the present application, as shown in FIG. 8, only one layer of battery cells 140 can be formed in the first installation space 131, and only one layer of battery cells 140 can be formed in the second installation space 132.

[0072] In some embodiments of the present application, in order to enable the first layer plate 110 and the second layer plate 120 to more stably clamp the battery cells 140 stacked in the first mounting space 131 and the battery cells 140 stacked in the second mounting space 132, as shown in FIGS. 5 to 7, the structural member further comprises a stay 150, two ends of the stay 150 being connected to the edges of the first layer plate 110 and the edges of the second layer plate 120 respectively. When the stay 150 is installed, the stay 150 forms 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 to each other to further clamp the battery cells 140, so that the battery cells 140 can be stably positioned in the first mounting space 131 and the second mounting space 132.

[0073] In some embodiments of the present application, in the second direction Y, one stay 150 is arranged corresponding to each pair of adjacent battery cells 140, that is, the shoulders of the adjacent two battery cells 140 are pressed by one stay 150 at the same time. And a plurality of stays 150 are arranged at intervals along the second direction Y. In this way, not only the number of stays 150 used can be minimized, which helps to reduce the overall weight of the battery module 100 and achieve the effect of lightweight design, but also the restriction of the stay 150 on the battery cell 140 is more stable. The stay 150 restricts the battery cell 140 in the first mounting space 131 and the second mounting space 132, avoiding the battery cell 140 from being pulled out of the first mounting space 131 and the second mounting space 132 in the direction perpendicular to the plate surface of the partition plate 130 under the action of external force, so that the battery cell 140 is not easy to be pulled out of the first mounting space 131 and the second mounting space 132, which helps to reinforce and stabilize the assembly of the battery cell 140.

[0074] Optionally, the stay 150 is made of steel material, so that the stay 150 is lighter and has stronger structural strength and structural flexibility.

[0075] In some embodiments of the present application, structural adhesive is arranged between the stay 150 and the corresponding battery cell 140. After the structural adhesive between the stay 150 and the battery cell 140 is cured, an insulating adhesive layer is formed between the stay 150 and the battery cell 140, preventing the battery cell 140 and the stay 150 from being in conduction and short circuit, thereby protecting the use safety of the battery cell 140. Moreover, the structural adhesive between the stay 150 and the battery cell 140 also has a flexible buffering effect, so that the stay 150 and the battery cell 140 are not in direct rigid contact, reducing the extrusion damage of the stay 150 to the battery cell 140, and protecting the integrity of the battery cell 140.

[0076] In some embodiments of the present application, one end of the pull rod 150 is connected to the edge of the first layer plate 110 by bolting, and the other end of the pull rod 150 is also connected to the edge of the second layer plate 120 by bolting. In this way, the difficulty of assembling the pull rod 150 is reduced, and the easy assembly makes the assembly of the pull rod 150 efficient, while also meeting the structural strength requirements of the assembly between the pull rod 150, the first layer plate 110 and the second layer plate 120, protecting the safety of the battery module 100.

[0077] In some embodiments of the present application, one end of the pull rod 150 is connected to the edge of the first layer plate 110 by bolting, and the other end of the pull rod 150 is also connected to the edge of the second layer plate 120 by bolting. In this way, the difficulty of assembling the pull rod 150 is reduced, and the easy assembly makes the assembly of the pull rod 150 efficient, while also meeting the structural strength requirements of the assembly between the pull rod 150, the first layer plate 110 and the second layer plate 120, protecting the safety of the battery module 100.

[0078] As shown in FIGS. 3, 5-7, in some embodiments of the present application, the structure further includes at least one intermediate layer plate 160, which is arranged between the first layer plate 110 and the second layer plate 120, and the upper and lower sides of the intermediate layer plate 160 are provided with battery monomers 140. By arranging the intermediate layer plate 160, the battery monomers 140 are indirectly stacked by the intermediate layer plate 160, which can reduce the stress of direct contact between the battery monomers 140 and the battery monomers 140, which is beneficial to protect the battery monomers 140, improve the overall strength of the battery module 100, and improve the overall safety performance of the battery module 100.

[0079] In some embodiments of the present application, the intermediate layer plate 160 can be a solid plate. The intermediate layer plate 160 serves to separate the mutually stacked battery monomers 140, which can reduce the stress of direct contact between the battery monomers 140 and the battery monomers 140, which is beneficial to protect the battery monomers 140.

[0080] In the process of charging and discharging of the battery device 200, that is, the charging and discharging of each battery monomer 140 at the same time, each battery monomer 140 will generate heat. In order to prevent the heat generated by the battery monomer 140 located in the first mounting space 131 from accumulating to cause the overall temperature of the battery module 100 to rise, therefore, as shown in FIGS. 5 to 7, in some embodiments of the present application, in the first mounting space 131, on the basis of improving the overall strength of the battery module 100 by using the intermediate layer plate 160 to protect the battery monomer 140, the intermediate layer plate 160 is set as the first liquid cooling plate 161, and the first liquid cooling plate 161 is arranged between two adjacent rows of battery monomers 140. In the battery module 100 of the present embodiment, in the first mounting space 131, the first liquid cooling plate 161 is not arranged between the first layer plate 110 and the layer of battery monomers 140 adjacent thereto, and between the second layer plate 120 and the layer of battery monomers 140 adjacent thereto. In the present embodiment, in the first mounting space 131, each first liquid cooling plate 161 simultaneously dissipates heat for two rows of battery monomers 140. In this way, in the process of charging and discharging of the battery module 100, the first liquid cooling plate 161 is supplied with cooling liquid, the heat generated by the battery monomer 140 is transferred to the first liquid cooling plate 161, and then the flowing cooling liquid carries away the heat, thereby achieving heat dissipation for the battery monomer 140. In this way, each battery monomer 140 located in the first mounting space 131 can be kept in a stable working temperature range, that is, the overall working temperature of the battery module 100 is always kept in a suitable temperature range, so that the battery module 100 can always charge and discharge normally.

[0081] In some other embodiments of the present application, one layer of battery monomers 140 is arranged between two adjacent first liquid cooling plates 161. In the battery module 100 of the present application, in the first mounting space 131, two larger side walls of the circumferential side wall 141 of any battery monomer 140 are provided with the first liquid cooling plate 161. In the present embodiment, in the first mounting space 131, two first liquid cooling plates 161 simultaneously dissipate heat for one layer of battery monomers 140, and the heat dissipation efficiency is better. In the process of charging and discharging of the battery module 100, the first liquid cooling plate 161 is supplied with cooling liquid, the heat generated by the battery monomer 140 is transferred to the first liquid cooling plate 161, and then the flowing cooling liquid carries away the heat, thereby achieving heat dissipation for the battery monomer 140.

[0082] Or, in some embodiments of the present application, a first liquid cooling plate 161 can be assembled in a manner that multiple rows of battery monomers 140 are arranged on both sides of the first liquid cooling plate 161, provided that the basic requirement of heat dissipation of the battery monomers 140 can be met. For example, two rows of battery monomers 140 are arranged on both sides of each first liquid cooling plate 161; or three rows of battery monomers 140 are arranged on both sides of each first liquid cooling plate 161. In this way, the basic requirement of heat dissipation of the battery monomers 140 can be met, and the number of assembled first liquid cooling plates 161 is reduced, which helps to reduce the overall weight of the battery module 100 and achieve the effect of lightweight design.

[0083] In order to prevent the heat generated by the battery monomers 140 located in the second mounting space 132 from accumulating and causing the overall temperature of the battery module 100 to rise, in some embodiments of the present application, as shown in FIGS. 5 to 7, in the second mounting space 132, on the basis of improving the overall strength of the battery module 100 by using the intermediate layer plate 160 to protect the battery monomers 140, the intermediate layer plate 160 is set as a second liquid cooling plate 162, and the second liquid cooling plate 162 is arranged between two adjacent rows of battery monomers 140. In the battery module 100 of the present embodiment, in the second mounting space 132, the first layer plate 110 and the layer of battery monomers 140 adjacent thereto, and the second layer plate 120 and the layer of battery monomers 140 adjacent thereto are not provided with the second liquid cooling plate 162. In the present embodiment, each second liquid cooling plate 162 simultaneously dissipates heat for two rows of battery monomers 140 in the second mounting space 132. In this way, during the charging and discharging process of the battery module 100, the second liquid cooling plate 162 is supplied with cooling liquid, the heat generated by the battery monomers 140 is transferred to the second liquid cooling plate 162, and then the flowing cooling liquid carries away the heat, thereby achieving heat dissipation of the battery monomers 140. In this way, each battery monomer 140 located in the second mounting space 132 can be kept within a stable working temperature range, that is, the overall working temperature of the battery module 100 is always kept within a suitable temperature range, so that the battery module 100 can always charge and discharge normally. In this way, each battery monomer 140 located in the first mounting space 131 can be kept within a stable working temperature range, that is, the overall working temperature of the battery module 100 is always kept within a suitable temperature range, so that the battery module 100 can always charge and discharge normally.

[0084] In some embodiments of the present application, one second liquid cooling plate 162 is arranged between two adjacent battery monomers 140. In the battery module 100 of the present application, two larger sidewalls of the circumferential sidewall 141 of any battery monomer 140 in the second mounting space 132 are provided with the second liquid cooling plate 162. In this embodiment, two second liquid cooling plates 162 simultaneously dissipate heat for one layer of battery monomers 140 in the second mounting space 132, and the heat dissipation efficiency is better. During the charging and discharging process of the battery module 100, the second liquid cooling plate 162 is filled with cooling liquid, and the heat generated by the battery monomer 140 is transferred to the second liquid cooling plate 162, and then the flowing cooling liquid carries away the heat, thereby achieving heat dissipation for the battery monomer 140.

[0085] Alternatively, in some embodiments of the present application, under the premise that the basic requirement of dissipating heat for the battery monomer 140 can be met, the second liquid cooling plate 162 can be assembled in a manner that multiple rows of battery monomers 140 are arranged on both sides of one second liquid cooling plate 162. For example, two rows of battery monomers 140 are arranged on both sides of each second liquid cooling plate 162; or three rows of battery monomers 140 are arranged on both sides of each second liquid cooling plate 162; etc. In this way, the basic requirement of dissipating heat for the battery monomer 140 can be met, and the number of second liquid cooling plates 162 is reduced, which helps to reduce the overall weight of the battery module 100 and achieve the effect of lightweight design.

[0086] In some embodiments of the present application, as shown in FIG. 6, the first layer plate 110 is provided with a first liquid cooling flow channel 111. In this way, during the charging and discharging process of the battery module 100, cooling liquid is filled into the first liquid cooling flow channel 111, and at this time the first layer plate 110 has the heat dissipation and cooling function of the liquid cooling plate. That is, the first layer plate 110 acts as a liquid cooling plate to dissipate heat and cool the battery monomer 140. In this way, the overall working temperature of the battery module 100 can be kept within the appropriate temperature range, further enabling the battery module 100 to always charge and discharge normally.

[0087] As shown in FIG. 6, in some embodiments of the present application, the second layer plate 120 is provided with a second liquid cooling flow channel 121. In this way, during the charging and discharging process of the battery module 100, cooling liquid is filled into the second liquid cooling flow channel 121, and at this time the second layer plate 120 has the heat dissipation and cooling function of the liquid cooling plate. That is, the second layer plate 120 acts as a liquid cooling plate to dissipate heat and cool the battery monomer 140. In this way, the overall working temperature of the battery module 100 can be kept within the appropriate temperature range, further enabling the battery module 100 to always charge and discharge normally.

[0088] As shown in FIG. 6, in some embodiments of the present application, the partition plate 130 is provided with a third liquid cooling channel 133. In this way, during the charging and discharging process of the battery module 100, the third liquid cooling channel 133 is filled with cooling liquid, and at this time the partition plate 130 has the heat dissipation and cooling function of a liquid cooling plate. That is, the partition plate 130 acts as a liquid cooling plate to dissipate heat and cool the battery monomer 140. In this way, the overall working temperature of the battery module 100 can be kept within the appropriate temperature range at all times, and the battery module 100 can always be normally charged and discharged.

[0089] In embodiments of the present 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. And the first liquid cooling plate 161 is arranged in the first mounting space 131, and the second liquid cooling plate 162 is arranged in the second mounting space 132. In this way, 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 together dissipate heat and cool the battery monomer 140, so that each battery monomer 140 can be kept within a stable working temperature range, that is, the overall working temperature of the battery module 100 can be kept within the appropriate temperature range at all times, so that the battery module 100 can always be normally charged and discharged.

[0090] Optionally, the first layer plate 110, the second layer plate 120 and the partition plate 130 are all made of metal materials with good heat conduction performance, including but not limited to aluminum materials, copper materials and steel materials.

[0091] In some embodiments of the present application, a structural adhesive is arranged between one end wall 142 of the battery monomer 140 and the plate surface of the corresponding partition plate 130. After the structural adhesive between the end wall 142 of the battery monomer 140 and the partition plate 130 is cured, an insulating adhesive layer is formed between the end wall 142 of the battery monomer 140 and the partition plate 130, preventing the battery monomer 140 and the partition plate 130 from being in conduction and short circuit, and protecting the use safety of the battery monomer 140. Moreover, the structural adhesive between the end wall 142 of the battery monomer 140 and the partition plate 130 also has a flexible buffering effect, so that the partition plate 130 does not directly rigidly contact the end wall 142 of the battery monomer 140. In this way, when the battery monomer 140 is pressed against the partition plate 130 by the tension strip 150, the end wall 142 of the battery monomer 140 can be prevented from being squeezed by the partition plate 130, and the integrity of the battery monomer 140 is protected.

[0092] In some embodiments of the present application, the first layer plate 110 is provided with structural glue between the larger side wall of the circumferential side wall 141 of the corresponding one of the battery monomers 140, and the second layer plate 120 is also provided with structural glue between the larger side wall of the circumferential side wall 141 of the corresponding one of the battery monomers 140. After the structural glue between the first layer plate 110 and the larger side wall of the battery monomer 140 and the structural glue between the second layer plate 120 and the larger side wall of the battery monomer 140 are both solidified, an insulating glue layer is formed between the first layer plate 110 and the larger side wall of the battery monomer 140 and between the second layer plate 120 and the larger side wall of the battery monomer 140, preventing the battery monomer 140 from being in conduction short circuit with the first layer plate 110 and the second layer plate 120, and protecting the use safety of the battery monomer 140. Moreover, the structural glue between the larger side wall of the battery monomer 140 and the first layer plate 110 and the structural glue between the larger side wall of the battery monomer 140 and the second layer plate 120 both have flexible buffering effect, so that the first layer plate 110 and the second layer plate 120 will not directly rigidly contact the larger side wall of the battery monomer 140. In this way, when the first layer plate 110 and the second layer plate 120 are pulled by the tension strip 150 to clampingly fix the battery monomer 140, the first layer plate 110 and the second layer plate 120 can reduce the extrusion damage to the larger side wall of the battery monomer 140, and the integrity of the battery monomer 140 is protected.

[0093] In some embodiments of the present application, the first layer plate 110 is connected with the partition plate 130 through bolts. In this way, the difficulty of assembling the first layer plate 110 and the partition plate 130 is reduced, the assembly efficiency is high, and at the same time, the structural strength requirement of the assembly between the first layer plate 110 and the partition plate 130 can be met, and the safety of the battery module 100 is protected.

[0094] In some other embodiments of the present application, the first layer plate 110 and the partition plate 130 are fixedly welded, so that the first layer plate 110 and the partition plate 130 are formed into an integrated structure, having better structural strength.

[0095] In some embodiments of the present application, the second layer plate 120 is connected with the partition plate 130 through bolts. In this way, the difficulty of assembling the second layer plate 120 and the partition plate 130 is reduced, the assembly efficiency is high, and at the same time, the structural strength requirement of the assembly between the second layer plate 120 and the partition plate 130 can be met, and the safety of the battery module 100 is protected.

[0096] In some other embodiments of the present application, the second layer plate 120 and the partition plate 130 are fixedly welded, so that the second layer plate 120 and the partition plate 130 are formed into an integrated structure, having better structural strength.

[0097] In the embodiments of the present application, the first layer plate 110 is connected to the partition plate 130 by bolts, and the second layer plate 120 is connected to the partition plate 130 by bolts.

[0098] As shown in FIG. 2 and FIG. 3, in some embodiments of the present application, the bottom 211 of the box 210 is provided with a load-bearing beam 240, which can be located on the side of the bottom 211 of the box 210 away from the battery module 100, or can be located on the inner side of the bottom 211 of the box 210. In the present application, the load-bearing beam 240 is located on the side of the bottom 211 of the box 210 away from the battery module 100 as an example for description. Any two opposite side edges of the first layer plate 110 or the second layer plate 120 are provided one by one corresponding to the load-bearing beam 240. In this way, when the battery module 100 is placed into the box 210, the load-bearing beam 240 bears most of the weight of the battery module 100, so that the bottom 211 of the box 210 will not be deformed under the extrusion of the weight of the battery module 100, and the integrity of the box 210 is maintained. Since the load-bearing beam 240 bears most of the weight of the battery module 100, the bottom 211 of the box 210 can be made of thin plates, and the circumferential wall of the box 210 can also be made of thin plates. Further, the cover 220 is also made of thin plates. In this way, the overall shell of the battery device 200 realizes the effect of lightweight design under the premise of meeting the requirement of covering and protecting the battery module 100, greatly reducing the overall weight of the battery device 200.

[0099] The battery device 200 provided by the present application can have only one battery module 100, or can have multiple battery modules 100.

[0100] In some embodiments of the present application, when the battery device 200 has only one battery module 100, as shown in FIG. 1 and FIG. 2, the two side edges of the first layer plate 110 of the battery module 100 correspond to the opposite two side edges of the bottom 211 of the box 210 respectively, so that the opposite two side edges of the bottom 211 of the box 210 are both provided with load-bearing beams 240. When the battery module 100 is placed on the bottom 211 of the box 210, the two load-bearing beams 240 bear most of the weight of the battery module 100, so that the bottom 211 of the box 210 will not be deformed. And the bottom 211 of the box 210 is made of thin plates, which helps the battery device 200 to realize the effect of lightweight design.

[0101] In some embodiments of the present application, when the battery device 200 has a plurality of battery modules 100, not only are the opposite two side edges of the bottom 211 of the box 210 provided with the load-bearing beams 240, but the load-bearing beams 240 are also provided between the opposite two side edges of the bottom 211 of the box 210. When the battery modules 100 are placed into the box 210, the opposite two side edges of the first layer plate 110 are respectively in one-to-one correspondence with the two load-bearing beams 240, so that each battery module 100 is supported by the corresponding two load-bearing beams 240, avoiding the battery modules 100 from causing extrusion to the bottom 211 of the box 210 to cause deformation of the bottom 211, and maintaining the integrity of the box 210. Moreover, the bottom 211 of the box 210 is made of a thin plate, which helps to achieve the lightweight design effect of the battery device 200. Furthermore, when the bottom of the battery device 200 is impacted by an external object, i.e., the bottom 211 of the box 210 is impacted by an external object, the load-bearing beams 240 can first offset the impact force of the external object, reducing the damage of the impact force of the external object to the battery monomer 140, thereby protecting the battery monomer 140.

[0102] As shown in FIGS. 2 and 3, on the basis of the load-bearing beams 240 bearing the battery modules 100, the bottom 211 of the box 210 is provided with a plurality of spaced reinforcing beams 250. The reinforcing beams 250 can be located on the side of the bottom 211 of the box 210 away from the battery modules 100, or can be located on the inner side of the bottom 211 of the box 210. In the present application, the reinforcing beams 250 are located on the side of the bottom 211 of the box 210 away from the battery modules 100. The two ends of each reinforcing beam 250 are respectively connected to the adjacent two load-bearing beams 240, and the reinforcing beam 250 abuts against the bottom 211 of the box 210. In this way, the reinforcing beams 250 bear the battery modules 100 together with the load-bearing beams 240, greatly improving the structural strength of the bottom 211 of the box 210. Moreover, it is conducive to achieving the assembly of the bottom 211 of the box 210 with a thin plate. Furthermore, when the bottom of the battery device 200 is impacted by an external object, i.e., the bottom 211 of the box 210 is impacted by an external object, the load-bearing beams 240 and the reinforcing beams 250 together resist the external object, which can first offset the impact force of the external object, reducing the damage of the impact force of the external object to the battery monomer 140, thereby protecting the battery monomer 140.

[0103] In some embodiments of the present application, structural glue is provided between the first layer plate 110 or the second layer plate 120 and the bottom 211 of the box 210. In the embodiments of the present application, as shown in FIG. 3, structural glue is provided between the first layer plate 110 and the bottom 211 of the box 210, and the battery device 200 is only equipped with one battery module 100, and the bottom 211 of the box 210 is assembled by a thin plate. In this way, the first layer plate 110 and the bottom 211 of the box 210 are integrated by structural glue, so that the structural strength of the bottom 211 of the box 210 made of a thin plate is enhanced, and the integrity of the battery device 200 is improved.

[0104] In the battery device 200 of some embodiments of the present application, the battery module 100 is provided in multiple, and the multiple battery modules 100 are sequentially arranged in the box shell 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 box shell 201 perpendicular to the second direction Y). When the overall length of the battery module 100 along the second direction Y is short, and the width of the box shell 201 perpendicular to the second direction Y is narrow and the length is sufficient, the multiple battery modules 100 can be sequentially arranged in the box shell 201 along the second direction Y, so that the multiple battery modules 100 form a straight line arrangement along the second direction Y; when the overall length of the battery module 100 along the second direction Y is short, and the width of the box shell 201 perpendicular to the second direction Y is wide and the length is sufficient, the multiple battery modules 100 are arranged in the box shell 201 in a rectangular array, and along the width direction of the box shell 201 perpendicular to the second direction Y, two adjacent battery modules 100 are arranged with a gap therebetween to reserve a gap for electrical connection wiring of the pole structure 144; when the length of the battery module 100 along the second direction Y is long, and the width of the box shell 201 perpendicular to the second direction Y is wide and the length is short, the multiple battery modules 100 are sequentially and spacedly arranged along the width direction of the box shell 201 perpendicular to the second direction Y, so that a gap is reserved between two adjacent battery modules 100 for electrical connection wiring of the pole structure 144.

[0105] According to the second aspect of the present application, a power consuming device 300 is provided. The power consuming device 300 includes the battery device 200 as described above, and the battery device 200 is used for charging and storing energy, and the battery device 200 is used for discharging to provide power for the power consuming load of the power consuming device 300.

[0106] The electric device 300 includes, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric automobile, a ship, a spacecraft, etc. The electric toy can include, but is not limited to, a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy, an electric aircraft toy, etc. The spacecraft can include, but is not limited to, an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0107] In the embodiments of the present application, the electric device 300 is an electric automobile. As shown in FIG. 9, the battery device 200 is installed on a frame 301 of the electric automobile. The battery device 200 provided by the embodiments of the present application is used to supply power to a driving motor 302 (i.e., an electric load of the electric device 300) of the electric automobile, so that the driving motor 302 drives a wheel 303 to rotate, and the electric automobile can run normally.

[0108] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized by, The battery device comprises: a box shell formed with a containing space; a battery module arranged in the containing space; wherein the battery module comprises: battery cells arranged in a square structure, at least two battery cells are arranged in a stacked manner in a first direction, the first direction is consistent with the thickness direction of the battery cells and the height direction of the box shell, wherein the thickness of the battery cells is smaller than the length and width of the battery cells, and the battery cells comprise a pole structure; a structural member fixed to at least one surface of the battery module, and the structural member avoids the pole structure.

2. The battery device according to claim 1, wherein the structural member comprises a first layer plate and a second layer plate, the first layer plate and the second layer plate are arranged on the uppermost surface and the lowermost surface of the battery module respectively, and the first layer plate and the second layer plate clamp and fix the battery cells, wherein the plate surface of the first layer plate and the second layer plate is perpendicular to the first direction.

3. The battery device according to claim 2, wherein the structural member further comprises at least one intermediate layer plate, the intermediate layer plate is arranged between the first layer plate and the second layer plate, and the upper and lower sides of the intermediate layer plate are provided with the battery cells.

4. The battery device according to claim 2 or 3, wherein the structural member further comprises a partition plate, two ends of the partition plate are connected to the first layer plate and the second layer plate respectively, the plate surface of the partition plate is arranged in parallel with the first direction, the first layer plate, the second layer plate and the partition plate form a first mounting space and a second mounting space, the battery cells are arranged in a stacked manner in the first mounting space and the second mounting space, and the battery cells abut against the partition plate.

5. The battery device according to claim 4, wherein the battery cells in the first mounting space and the battery cells in the second mounting space are arranged symmetrically with respect to the partition plate, and the pole structure is arranged on the surface of the battery cells away from the partition plate.

6. The battery device according to claim 4 or 5, wherein in the first mounting space and the second mounting space, a plurality of battery cells are arranged in a layer along a second direction, and a plurality of layers are stacked along the first direction, wherein the second direction is perpendicular to the first direction and parallel to the plate surface of the partition plate.

7. The battery device according to any one of claims 2-6, wherein the structural member further comprises a stay, two ends of the stay are connected to the edge of the first layer plate and the edge of the second layer plate respectively.

8. The battery device according to claim 7, wherein the shoulders of two adjacent battery cells in the second direction are pressed by one stay at the same time.

9. The battery device according to claim 7 or 8, wherein structure glue is arranged between the stay and the battery cells.

10. The battery device according to any one of claims 7-9, wherein The other end of the bracing strip and the edge of the second layer plate are connected by bolting or welding.

11. The battery device according to any one of claims 3-10, wherein the intermediate layer plate comprises a liquid cooling plate; At least one liquid cooling plate is arranged between any two adjacent battery cells. Alternatively, a plurality of battery cells are arranged on both sides of the liquid cooling plate.

12. The battery device according to any one of claims 2-11, wherein the first layer plate is provided with a first liquid cooling flow channel for cooling liquid flow; And / or, the second layer plate is provided with a second liquid cooling flow channel for cooling liquid flow.

13. The battery device according to any one of claims 4-12, wherein the partition plate is provided with a third liquid cooling flow channel for cooling liquid flow.

14. The battery device according to any one of claims 4-13, wherein a structural adhesive is arranged between the surface of the battery cell facing the partition plate and the partition plate.

15. The battery device according to any one of claims 2-14, wherein a structural adhesive is arranged 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.

16. The battery device according to any one of claims 4-15, wherein the first layer plate and the partition plate are connected by bolting or welding; And / or, the second layer plate and the partition plate are connected by bolting or welding.

17. The battery device according to any one of claims 1-16, wherein the box shell comprises a box body and a cover body, the cover body covers the box body to form the accommodating space, the bottom of the box body is provided with a load-bearing beam, and any opposite edge regions formed by the structural members in the battery module are arranged in one-to-one correspondence with the load-bearing beams.

18. The battery device according to claim 17, wherein the load-bearing beams extend along the length direction of the box shell.

19. The battery device according to claim 17 or 18, wherein the bottom of the box body is provided with a reinforcing beam, both ends of the reinforcing beam are connected to the opposite load-bearing beams respectively, and the reinforcing beam abuts against the bottom of the box body.

20. The battery device according to any one of claims 17-19, wherein a structural adhesive is arranged between the surface of the battery module facing the bottom of the box body and the bottom of the box body.

21. The battery device according to any one of claims 1-20, wherein a plurality of battery modules are arranged, and the plurality of battery modules are arranged in sequence in a direction perpendicular to the first direction. The battery device according to any one of claims 1-21. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 22. An electrical device, comprising: ​ ​

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