Battery device and electric device

Abstract

The application discloses a battery device and a power utilization device, the battery device comprising a box body, a plurality of battery modules and a module plugboard, the battery modules being arranged in the box body, at least part of the battery modules being arranged in sequence along a first direction, the module plugboard being arranged between two adjacent battery modules along the first direction, and the module plugboard being connected with the two adjacent battery modules. According to the battery device, the battery device comprises the box body, the plurality of battery modules and the module plugboard, so that the two adjacent battery modules which are independent and dispersed are connected into a whole structure through the module plugboard, the structural strength and the deformation resistance of the whole battery module are effectively improved, the module plugboard can better fill the gap between the two adjacent battery modules, can effectively buffer the extrusion force between the two adjacent battery modules, and can effectively reduce the possibility that the battery cells of the battery module are damaged or even leak due to the mutual extrusion of the two adjacent battery modules.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Technology

[0002] In related technologies, battery devices mainly consist of a housing and battery modules housed within it. A common assembly method involves placing multiple battery modules directly inside the housing. While this approach is cost-effective, the overall structural strength of the battery modules is relatively weak. For example, under prolonged vibration, the battery modules are prone to deformation due to mutual compression, and this deformation or compression between adjacent modules can even lead to individual battery cells breaking and leaking. Therefore, improving the overall structural strength and deformation resistance of the battery modules has become a pressing technical problem. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a battery device in which at least a portion of the battery modules are arranged along a first direction, and in the first direction, a module insert plate is sandwiched between two adjacent battery modules and connected to both battery modules, which can effectively improve the overall structural strength and deformation resistance of the battery modules, and can also effectively buffer the compressive force between two adjacent battery modules.

[0004] The present invention also proposes an electrical device including the above-described battery device.

[0005] According to a first aspect of the present invention, a battery device includes: a housing; a plurality of battery modules disposed within the housing, at least some of the battery modules being arranged sequentially along a first direction; and a module insert plate, which is sandwiched between two adjacent battery modules in the first direction, and is connected to both adjacent battery modules.

[0006] According to the battery device of the present invention, the battery device includes a housing, a plurality of battery modules and a module insert plate. The housing can support and protect the battery modules and the module insert plate, which is beneficial to extending the service life of the battery modules. Furthermore, by sandwiching the module insert plate between two adjacent battery modules in a first direction and connecting it to both adjacent battery modules, the two adjacent battery modules that are independently dispersed are connected into a whole structure through the module insert plate, which effectively improves the overall structural strength and deformation resistance of the battery module.

[0007] In addition, the module insert can effectively fill the gap between two adjacent battery modules, allowing them to remain stably in their respective positions. The module insert can also reduce the force exerted when two adjacent battery modules are pressed together, thus effectively buffering the pressure between them. This can effectively reduce the possibility of individual battery cells being damaged or even leaking due to mutual compression, thereby improving the overall reliability of the battery device.

[0008] According to some embodiments of the present invention, at least a portion of the module insert is a polymer material component.

[0009] According to some embodiments of the present invention, the module insert includes an insert body and a module buffer layer, the module buffer layer being located on opposite sides of the insert body along a first direction, and the hardness of the module buffer layer being less than the hardness of the insert body.

[0010] According to some embodiments of the present invention, the insert body is a metal part or a polymer part, and the module buffer layer is a polymer part.

[0011] According to some embodiments of the present invention, the insert body is an epoxy resin component; and / or, the module buffer layer is a foam layer.

[0012] According to some embodiments of the present invention, the module buffer layer includes two rows of foam groups, the two rows of foam groups are respectively disposed at both ends of the insert body along a third direction, each row of foam groups includes a plurality of foam strips spaced apart along a second direction, the first direction, the second direction and the third direction intersect each other.

[0013] According to some embodiments of the present invention, the thickness of the insert body along the first direction ranges from 0.9 mm to 1.1 mm; and / or, when the module buffer layer is in its natural state, the thickness of the module buffer layer along the first direction ranges from 0.4 mm to 0.7 mm.

[0014] According to some embodiments of the present invention, the thickness of the insert body along the first direction is greater than the thickness of the module buffer layer along the first direction.

[0015] According to some embodiments of the present invention, the module insert plate is bonded and fixed to the battery module by a first adhesive layer.

[0016] According to some embodiments of the present invention, the first adhesive layer is a potting compound layer.

[0017] According to some embodiments of the present invention, the length dimension of the battery module along the second direction is a1, the length dimension of the module insert plate along the second direction is a2, and a1 and a2 satisfy: 8mm≤a1-a2≤12mm, and the second direction intersects the first direction; And / or, the height dimension of the battery module along the third direction is h1, and the height dimension of the module insert along the third direction is h2, h1 and h2 satisfy: h1≥h2≥0.5h1, and the first direction, the second direction and the third direction intersect each other.

[0018] According to some embodiments of the present invention, the battery module includes a plurality of battery cells arranged sequentially along a second direction. The battery cells are rectangular in shape and have two large surfaces arranged opposite each other along the second direction. The large surface is the side surface with the largest area of ​​the battery cell. The second direction intersects with the first direction.

[0019] According to some embodiments of the present invention, in the second direction, a cell buffer layer is provided between two adjacent battery cells in the same battery module.

[0020] According to some embodiments of the present invention, the cell buffer layer extends in a ring shape along the circumference of the large surface; and / or, the cell buffer layer is a foam layer.

[0021] According to some embodiments of the present invention, the side of the battery module opposite to the module insert plate along the first direction is fixedly connected to the housing by a second adhesive layer; And / or, the battery module is fixedly connected to the housing on one side along a third direction by a third adhesive layer, the first direction intersecting the third direction.

[0022] According to some embodiments of the present invention, the second adhesive layer is a foamed adhesive layer; and / or, the third adhesive layer is a thermally conductive structural adhesive layer, the housing includes a cold plate, and the third adhesive layer is connected to the cold plate.

[0023] An electrical device according to a second aspect of the present invention includes: a battery device according to the first aspect of the present invention described above.

[0024] According to the embodiments of the present invention, the electrical device having the above-described battery device has a better working life and performance, which is beneficial to improving the performance of the electrical device.

[0025] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a simplified diagram of a battery device according to some embodiments of the present invention; Figure 2 yes Figure 1 A partial schematic diagram of the battery device in the diagram; Figure 3 yes Figure 2 A schematic diagram of the battery device from another angle; Figure 4 yes Figure 2 A schematic diagram of the battery device from another angle; Figure 5 yes Figure 4 Enlarged view of point A in the middle; Figure 6 yes Figure 2 A schematic diagram of part of the battery device in the diagram; Figure 7 yes Figure 6 Another perspective view of the battery device's partial structure; Figure 8 yes Figure 7 Enlarged view of point B in the middle; Figure 9 yes Figure 7 A schematic diagram of the cell buffer layer in the battery device; Figure 10 yes Figure 2 A schematic diagram of part of the battery device from another angle; Figure 11 yes Figure 2 A schematic diagram of the assembly of the module insert and the battery module in the battery device; Figure 12 yes Figure 11 A schematic diagram of the module insert; Figure 13 This is a simplified diagram of an electrical device according to some embodiments of the present invention.

[0027] Figure label: 1000. Electrical appliances; 200. Vehicle body; 100. Battery device; 1. Box body; 2. Battery module; 21. Battery cell; 211. Cell buffer layer; 212. Large surface; 2121. First side; 2122. Second side; 3. Module insert plate; 31. Insert plate body; 32. Module buffer layer; 321. Foam assembly; 322. Foam strip; 42. Second adhesive layer; 43. Third adhesive layer; 44. Restricting rib group; 441. Restricting rib strip. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0029] The following is for reference. Figures 1-12 A battery device 100 according to an embodiment of the present invention is described.

[0030] Reference Figure 4 , Figure 5 , Figure 10 , Figure 11 and Figure 12 According to a first aspect embodiment of the present invention, the battery device 100 includes a housing 1, a plurality of battery modules 2 and a module insert 3. The battery modules 2 are disposed in the housing 1, and at least some of the battery modules 2 are arranged sequentially along a first direction. In the first direction (for example, referring to the e1 direction in the figure), the module insert 3 is sandwiched between two adjacent battery modules 2, and the module insert 3 is connected to both adjacent battery modules 2.

[0031] The arrangement of at least some battery modules 2 along the first direction can include the following situations: for example, some battery modules 2 can be arranged along the first direction; or all battery modules 2 can be arranged along the first direction.

[0032] By placing the battery module 2 inside the housing 1, the housing 1 can support and protect the battery module 2, reducing the possibility of friction and wear caused by external impacts, which helps to extend the service life of the battery module 2.

[0033] In the first direction, by providing a module insert 3 between two adjacent battery modules 2 and connecting the module insert 3 to both adjacent battery modules 2, a fixed connection between the two adjacent battery modules 2 can be achieved, so that the two independently dispersed adjacent battery modules 2 are connected into a whole structure, which effectively improves the overall structural strength of the two adjacent battery modules 2 and reduces the possibility of overall deformation of the two adjacent battery modules 2. In addition, the module insert 3 can also fill the gap between the two adjacent battery modules 2 well. For example, the module insert 3 can limit the distance between the two adjacent battery modules 2 by its own thickness in all directions, so that the two adjacent battery modules 2 are stably held in the corresponding position. This can effectively reduce the possibility of damage or even leakage caused by the two adjacent battery modules 2 being squeezed against each other, which is conducive to improving the overall reliability of the battery device 100.

[0034] In addition, the module insert plate 3 can also buffer the squeezing force between two adjacent battery modules 2, which can reduce the squeezing force between two adjacent battery cells 21 to a certain extent and effectively reduce the possibility of damage or even leakage caused by mutual squeezing between two adjacent battery modules 2.

[0035] For example, compared to the force of two adjacent battery modules 2 directly squeezing each other, by providing a module insert 3 between two adjacent battery cells 21, the module insert 3 can effectively weaken the force when the two adjacent battery modules 2 are pressed together, effectively buffer the squeezing force between the two adjacent battery modules 2, and avoid the possibility of the two adjacent battery modules 2 directly squeezing and colliding.

[0036] In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0037] According to the battery device 100 of the present invention, the battery device 100 includes a housing 1, a plurality of battery modules 2 and a module insert plate 3. The housing 1 can support and protect the battery modules 2 and the module insert plate 3, which is beneficial to extending the service life of the battery modules 2. Furthermore, by sandwiching the module insert plate 3 between two adjacent battery modules 2 in the first direction and connecting it to both adjacent battery modules 2, the two adjacent battery modules 2 that are independently dispersed are connected into a whole structure through the module insert plate 3, which effectively improves the overall structural strength and deformation resistance of the battery modules 2.

[0038] In addition, the module insert plate 3 can fill the gap between two adjacent battery modules 2, so that the two adjacent battery modules 2 are stably held in the corresponding positions. The module insert plate 3 can also reduce the force when the two adjacent battery modules 2 are pressed together. This can effectively buffer the squeezing force between the two adjacent battery modules 2, thereby effectively reducing the possibility of damage or even leakage of the battery cells 21 of the battery module 2 due to mutual squeezing between the two adjacent battery modules 2, which is conducive to improving the overall reliability of the battery device 100.

[0039] Reference Figures 10-12 According to some embodiments of the present invention, at least a portion of the module insert 3 is a polymer material component.

[0040] The fact that at least a portion of the module insert 3 is made of polymer material can include the following situations: for example, a portion of the module insert 3 may be made of polymer material; or, for another example, all of the module insert 3 may be made of polymer material.

[0041] By making at least a portion of the module insert plate 3 a polymer material, the module insert plate 3 can be made lighter due to the low density of the polymer material, thus reducing the overall weight of the battery device 100 and contributing to its overall lightweight design. Furthermore, the polymer material has a certain ability to absorb deformation and buffer, giving the module insert plate 3 a certain deformation capacity. This allows the module insert plate 3 to absorb and buffer the compressive force between two adjacent battery modules 2 to a certain extent through its own micro-deformation.

[0042] Reference Figures 10-12 According to some embodiments of the present invention, the module insert plate 3 includes an insert plate body 31 and a module buffer layer 32. The module buffer layer 32 is located on opposite sides of the insert plate body 31 along a first direction, and the hardness of the module buffer layer 32 is less than the hardness of the insert plate body 31.

[0043] The module insert plate 3 includes an insert plate body 31 and a module buffer layer 32, and the hardness of the module buffer layer 32 is less than that of the insert plate body 31. In this way, the insert plate body 31 can support the module buffer layer 32, so that the module insert plate 3 as a whole has high structural strength.

[0044] By positioning the module buffer layer 32 on opposite sides of the plug-in body 31 along the first direction, the module buffer layer 32 can effectively absorb the compressive force of the battery modules 2 located on opposite sides of the plug-in body 31 along the first direction, thereby enabling the module plug-in 3 to effectively buffer the compressive force between two adjacent battery modules 2. Furthermore, the module buffer layer 32 located on opposite sides of the plug-in body 31 along the first direction can also, to a certain extent, prevent friction and wear caused by direct compression between the battery modules 2 and the plug-in body 31, thereby reducing friction and wear caused by direct contact between the battery modules 2 and the plug-in body 31 and extending the service life of the module plug-in 3.

[0045] Reference Figures 10-12 According to some embodiments of the present invention, the insert body 31 is a metal part or a polymer part, and the module buffer layer 32 is a polymer part. For example, the insert body 31 may be a metal part and the module buffer layer 32 may be a polymer part; or, for another example, the insert body 31 may be a polymer part and the module buffer layer 32 may be a polymer part.

[0046] By making the insert body 31 a metal part, the insert body 31 can have a high degree of rigidity, which can effectively support the module buffer layer 32. It can also make the module insert 3 as a whole have a high structural strength, which is conducive to improving the overall structural strength of multiple battery modules 2. Furthermore, by making the module buffer layer 32 a polymer part, the low density of the polymer part can make the module buffer layer 32 lighter, which can reduce the overall weight of the module insert 3 and contribute to the overall weight reduction of the battery device 100. In addition, the polymer part has a certain deformation absorption and buffering capacity, which can make the module buffer layer 32 have good deformation capacity. This allows the module insert 3 to absorb and buffer the extrusion force between two adjacent battery modules 2 to a certain extent by utilizing the deformation of the module buffer layer 32 itself.

[0047] Alternatively, by making both the insert plate body 31 and the module buffer layer 32 polymer components, the low density of polymer components can reduce the weight of the insert plate body 31 and the module buffer layer 32, thus reducing the overall weight of the module insert plate 3 and contributing to the overall lightweighting of the battery device 100. Furthermore, polymer components have a certain ability to absorb deformation and buffer, allowing both the insert plate body 31 and the module buffer layer 32 to have a certain deformation capacity. This allows the module insert plate 3 to absorb and buffer the compressive force between two adjacent battery modules 2 to a certain extent by utilizing the deformation of the insert plate body 31 and the module buffer layer 32 themselves.

[0048] Reference Figures 10-12According to some embodiments of the present invention, the insert body 31 is an epoxy resin component. Because epoxy resin components have high hardness, the module insert 3 can have high hardness, effectively supporting and limiting the two adjacent battery modules 2, reducing or preventing the possibility of deformation caused by mutual compression between the two adjacent battery modules 2, and thus improving the overall structural strength and deformation resistance of the multiple battery modules 2. Furthermore, the low density of epoxy resin components allows for a lighter module insert 3, which, while effectively supporting and limiting the spacing between the two adjacent battery modules 2, also contributes to the overall lightweighting of the battery device 100.

[0049] In addition, the epoxy resin board has insulating properties. By making the insert plate body 31 an epoxy resin component, it can insulate the two adjacent battery modules 2. In this way, while the module insert plate 3 connects the two adjacent battery modules 2, it can effectively prevent the two adjacent battery modules 2 from directly contacting each other and short-circuiting.

[0050] Reference Figure 12 According to some embodiments of the present invention, the module buffer layer 32 is a foam layer. For example, the foam layer may be EVA foam.

[0051] By making the module buffer layer 32 a foam layer, since foam has a good ability to absorb deformation and buffer, the module buffer layer 32 can have a good deformation capacity. This allows the module buffer layer 32 to better absorb and buffer the squeezing force between two adjacent battery modules 2, reduce the deformation of the two adjacent battery modules 2, and also reduce the possibility of the battery cells 21 of the two adjacent battery modules 2 being damaged and leaking due to this squeezing force.

[0052] Reference Figure 12 According to some embodiments of the present invention, the module buffer layer 32 includes two rows of foam groups 321, which are respectively disposed at both ends of the insert body 31 along a third direction (for example, referring to the e3 direction in the figure). Each row of foam groups 321 includes a plurality of foam strips 322 spaced apart along a second direction (for example, referring to the e2 direction in the figure). The first direction, the second direction and the third direction intersect each other.

[0053] By including two rows of foam groups 321 in the module buffer layer 32, with the two rows of foam groups 321 respectively located at opposite ends of the insert body 31 along the third direction, the force distribution of the module insert 3 in the third direction can be made more uniform. This can more evenly absorb and buffer the squeezing force between two adjacent battery modules 2 borne by the insert body 31 in the third direction. Furthermore, by including multiple foam strips 322 spaced apart along the second direction in each row of foam groups 321, the force distribution of the module insert 3 in the second direction can be made more uniform. This can more evenly absorb and buffer the squeezing force between two adjacent battery modules 2 borne by the insert body 31 in the second direction.

[0054] In addition, by having two rows of foam groups 321 respectively disposed at both ends of the insert body 31 along a third direction and multiple foam strips 322 spaced apart along a second direction, the foam can be relatively evenly supported between the insert body 31 and the battery module 2 in the second direction, forming multiple gaps between the insert body 31 and the battery module 2. These gaps can be relatively evenly distributed along the second direction. For example, when the insert body 31 and two adjacent battery modules 2 are bonded together with adhesive, the adhesive can be injected into the gaps between the insert body 31 and the battery module 2 from multiple locations during the bonding process. This effectively fills the gaps between the insert body 31 and the battery module 2 and allows the adhesive to be relatively evenly distributed between the insert body 31 and the battery module 2, thereby enhancing the connection strength and stability between the battery module 2 and the insert body 31.

[0055] According to some embodiments of the present invention, the thickness of the insert body 31 along the first direction ranges from 0.9 mm to 1.1 mm. For example, the thickness of the insert body 31 along the first direction can be 0.9 mm, 0.95 mm, 1 mm, 1.05 mm, and 1.1 mm, etc.

[0056] For example, if the thickness of the plug body 31 along the first direction is less than 0.9 mm, the structural strength of the plug body 31 is weak, and it is easy to be crushed when subjected to the extrusion force of two adjacent battery modules 2. By making the thickness of the plug body 31 along the first direction not less than 0.9 mm, the plug body 31 can have a stronger structural strength, thereby reducing the possibility of the plug body 31 breaking under stress.

[0057] For example, if the thickness of the insert body 31 along the first direction is greater than 1.1mm, the thickness of the insert body 31 itself is too large, which makes the module insert 3 occupy a large space along the first direction, which will reduce the energy density of the battery device 100. By ensuring that the thickness of the insert body 31 along the first direction does not exceed 1.1mm, the thickness of the insert body 31 along the first direction can be smaller, which in turn can make the overall space occupied by the module insert 3 in the first direction smaller, which is beneficial to improving the energy density of the battery device 100.

[0058] By making the thickness of the insert body 31 in the first direction range from 0.9mm to 1.1mm, the insert body 31 has strong structural strength, reducing the possibility of the insert body 31 breaking due to force. At the same time, the thickness of the insert body 31 in the first direction can be small, which can reduce the space occupied by the module insert 3 in the first direction, which is beneficial to improving the energy density of the battery device 100.

[0059] According to some embodiments of the present invention, when the module buffer layer 32 is in its natural state, the thickness of the module buffer layer 32 along the first direction ranges from 0.4 mm to 0.7 mm. For example, when the module buffer layer 32 is in its natural state, the thickness of the module buffer layer 32 along the first direction can be 0.4 mm, 0.45 mm, 0.5 mm, 0.6 mm, 0.7 mm, etc.

[0060] The module buffer layer 32 being in its natural state means that the module buffer layer 32 has not been deformed.

[0061] For example, if the thickness of the module buffer layer 32 is less than 0.4 mm, the deformation of the module buffer layer 32 along the first direction is small, making it difficult to absorb and buffer the extrusion force between two adjacent battery modules 2. By ensuring that the thickness of the module buffer layer 32 is not less than 0.4 mm, the deformation of the module buffer layer 32 along the first direction can be sufficient to effectively buffer the extrusion force between two adjacent battery modules 2.

[0062] For example, if the thickness of the module buffer layer 32 is greater than 0.7mm, the structural strength of the module buffer layer 32 itself is too high, and its resistance to deformation is too strong, making it difficult for the module buffer layer 32 to deform. In addition, the excessive thickness of the module buffer layer 32 itself results in a large space occupied by the module insert plate 3 along the first direction, which will reduce the energy density of the battery device 100. By keeping the thickness of the module buffer layer 32 to no more than 0.7mm, the module buffer layer 32 can be deformed more easily to better absorb the expansion deformation of the battery cell 21. It can also make the thickness of the module buffer layer 32 along the first direction smaller, thereby making the space occupied by the module insert plate 3 as a whole in the first direction smaller, which is beneficial to improving the energy density of the battery device 100.

[0063] By having the module buffer layer 32 in its natural state with a thickness of 0.4mm to 0.7mm, the module buffer layer 32 has sufficient deformation along the first direction to effectively buffer the compressive force between two adjacent battery modules 2. At the same time, the module buffer layer 32 can be easily deformed to better absorb the compressive force between the two adjacent battery modules 2. It can also reduce the space occupied by the module insert plate 3 as a whole in the first direction, which is beneficial to improving the energy density of the battery device 100.

[0064] In some embodiments, by making the thickness of the insert plate body 31 in the first direction range from 0.9mm to 1.1mm, and the thickness of the module buffer layer 32 in the first direction range from 0.4mm to 0.7mm, the thickness range of the module insert plate 3 in the first direction can be limited to 1.7mm to 2.5mm. This can limit the spacing between two adjacent battery modules 2. That is, the thickness of the module insert plate 3 itself can position the two adjacent battery modules 2, so that there is a certain spacing between the two adjacent battery modules 2. This reduces or prevents the two adjacent battery modules 2 from deforming due to mutual compression, which could lead to the possibility of damage and leakage of the battery cells 21 of the battery module 2. It can also make the spacing between the two adjacent battery modules 2 moderate. In this way, with a certain amount of internal space in the battery box 1, as many battery modules 2 as possible can be placed, which is beneficial to improving the overall energy density of the battery device 100.

[0065] According to some embodiments of the present invention, the thickness of the insert body 31 along the first direction is greater than the thickness of the module buffer layer 32 along the first direction. Since the hardness of the insert body 31 is greater than the hardness of the module buffer layer 32, the insert body 31 can strengthen the overall structural strength of two adjacent battery modules 2, and the module buffer layer 32 can buffer the compressive force between the two adjacent battery modules 2. By making the thickness of the insert body 31 along the first direction greater than the thickness of the module buffer layer 32 along the first direction, the strengthening effect of the insert body 31 on the overall structural strength of the two adjacent battery modules 2 can be guaranteed.

[0066] Reference Figure 4 and Figure 5 According to some embodiments of the present invention, the module insert 3 and the battery module 2 are bonded and fixed by a first adhesive layer, which makes the connection between the battery module 2 and the module insert 3 simple and has strong stability.

[0067] Reference Figure 4 and Figure 5 According to some embodiments of the present invention, the first adhesive layer is a potting compound layer. Since the potting compound has high adhesive strength after curing, by making the first adhesive layer a potting compound layer, the module insert 3 and the battery module 2 can be bonded more stably, so that the module insert 3 and the battery module 2 form a more reliable structure, which is beneficial to enhance the overall structural strength of the module insert 3 and the battery module 2, thereby effectively improving the overall structural strength of the multiple battery modules 2.

[0068] Reference Figure 10According to some embodiments of the present invention, the length dimension of the battery module 2 along the second direction is a1, and the length dimension of the module insert 3 along the second direction is a2. a1 and a2 satisfy: 8mm≤a1-a2≤12mm, and the second direction intersects the first direction. For example, a1-a2 can be 8mm, 9mm, 10mm, 11mm, 12mm, etc.

[0069] By ensuring that a1-a2 ≥ 8mm, a certain difference can be created between the length dimension a2 of the module insert 3 along the second direction and the length dimension a1 of the battery module 2 along the second direction. This allows the module insert 3 to be sandwiched between two adjacent battery modules 2 and connected to both of them, thereby improving the overall structural strength of the two battery modules 2. At the same time, it can prevent the length dimension of the module insert 3 along the second direction from being too large and interfering with other components. For example, during the process of placing the battery module 2 and the module insert 3 into the housing 1, by ensuring that a1-a2 ≥ 8mm, a certain gap can be created between the dimension of the module insert 3 along the second direction and the dimension of the battery module 2 along the second direction. This can reduce or avoid interference with the tooling or other components in the housing 1 due to the module insert 3 protruding from the end of the battery module 2 in the second direction. This makes the assembly of the module insert 3 and the battery module 2 smoother and allows for a certain dimensional tolerance in the length dimension of the module insert 3 along the second direction, which is convenient for the processing and manufacturing of the module insert 3.

[0070] By ensuring that a1-a2≥8mm, the difference between the length dimension a2 of the module insert 3 along the second direction and the length dimension a1 of the battery module 2 along the second direction can be moderate. This results in a larger length dimension of the module insert 3 in the second direction, giving the module insert 3 stronger structural strength. Consequently, the module insert 3 can effectively improve the overall structural strength and deformation resistance of the two adjacent battery modules 2.

[0071] By ensuring that a1 and a2 satisfy 8mm≤a1-a2≤12mm, the length of the module insert 3 in the second direction can be made moderate. This avoids the module insert 3 protruding from one end of the battery module 2 in the second direction and interfering with the tooling or housing 1, making the assembly of the module insert 3 and the battery module 2 smoother. It also allows for a certain dimensional tolerance in the length of the module insert 3 in the second direction, reducing the production difficulty of the module insert 3. Furthermore, it gives the module insert 3 strong structural strength, effectively enhancing the overall rigidity and deformation resistance of the two adjacent battery modules 2.

[0072] Reference Figure 10According to some embodiments of the present invention, the height dimension of the battery module 2 along a third direction is h1, and the height dimension of the module insert 3 along a third direction is h2. h1 and h2 satisfy: h1≥h2≥0.5h1, and the first direction, the second direction, and the third direction intersect each other. For example, h2 can be 0.5h1, 0.6h1, 0.7h1, 0.8h1, 0.9h1, h1, etc.

[0073] By ensuring that the height h2 of the module insert plate 3 along the third direction is not less than 0.5h1, the support height of the module insert plate 3 along the third direction is sufficient. This ensures that after the module insert plate 3 is assembled with two adjacent battery modules 2, the connection between the two adjacent battery modules 2 and the module insert plate 3 is stronger and more stable, effectively preventing the battery modules 2 from tilting or tipping over. It also avoids the risk of short circuits caused by direct contact between two adjacent battery modules 2 due to the insufficient height of the module insert plate 3.

[0074] By ensuring that the height dimension h2 of the module insert plate 3 along the third direction is not greater than the height dimension h1 of the battery module 2 along the third direction, it is possible to avoid the module insert plate 3 protruding from one end of the battery module 2 along the third direction and interfering with the tooling or housing 1, thus making the assembly of the module insert plate 3 and the battery module 2 as a whole smoother.

[0075] By ensuring that h1 and h2 satisfy h1≥h2≥0.5h1, the support height of the module insert plate 3 in the third direction can be moderate. On the one hand, after the module insert plate 3 is assembled with the two adjacent battery modules 2, the connection between the two adjacent battery modules 2 and the module insert plate 3 can be stronger and more stable, effectively preventing the battery modules 2 from tilting or tipping over. On the other hand, it can also avoid the module insert plate 3 from being too high in the third direction and interfering with the tooling or housing 1, making the overall assembly of the module insert plate 3 and the battery modules 2 smoother.

[0076] Reference Figure 4 , Figure 5 , Figure 7 and Figure 8 According to some embodiments of the present invention, the battery module 2 includes a plurality of battery cells 21 arranged sequentially along a second direction. The battery cell 21 is rectangular in shape and has two large surfaces 212 arranged opposite to each other along the second direction. The large surface 212 is the side surface with the largest area among the surfaces of the battery cell 21. The second direction intersects with the first direction.

[0077] The battery cell 21 has multiple outer surfaces, among which the largest surface is the large surface 212. Since the large surface 212 of the battery cell 21 expands and deforms significantly, the module insert 3 is sandwiched between two adjacent battery modules 2 in the first direction. This allows the module insert 3 to be sandwiched between the smaller side surfaces of the battery cells 21 of the two adjacent battery modules 2. In this way, while assembling the module insert 3 with the battery modules 2 to improve the overall structural strength and deformation resistance of the multiple battery modules 2, the expansion force of the battery cells 21 on the module insert 3 can be reduced, which is beneficial to extending the service life of the module insert 3.

[0078] Reference Figure 4 , Figure 5 , Figure 7 and Figure 8 According to some embodiments of the present invention, in the second direction, a cell buffer layer 211 is provided between two adjacent battery cells 21 in the same battery module 2. By providing a cell buffer layer 211 between two adjacent battery cells 21 in the second direction, the expansion and deformation of the battery cells 21 can be absorbed, reducing or avoiding the possibility of damage caused by mutual compression of the battery cells 21.

[0079] Reference Figure 7 and Figure 8 According to some embodiments of the present invention, the cell buffer layer 211 extends in a ring shape along the circumference of the large surface 212.

[0080] Since the expansion deformation in the middle of the large surface 212 of the battery cell 21 is relatively large, by extending the cell buffer layer 211 in a ring shape along the circumference of the large surface 212, the expansion deformation of the battery cell 21 can be absorbed, and the thickness of the cell buffer layer 211 itself in the second direction can reserve a certain space for the expansion deformation in the middle of the large surface 212, thereby reducing the squeezing effect of the expansion deformation in the middle of the large surface 212 on the cell buffer layer 211. The ring structure can also make the stress distribution of the cell buffer layer 211 more uniform, reduce the possibility of local stress concentration, and help extend the service life of the cell buffer layer 211.

[0081] For example, in the first direction, the module insert 3 is bonded to two adjacent battery modules 2 by potting compound. The cell buffer layer 211 extends in a ring along the circumference of the large surface 212. This ring structure can seal the gap between two adjacent battery cells 21 in the second direction, prevent the potting compound from seeping into the gap between the two adjacent battery cells 21, and avoid the accumulation of the compound affecting the expansion and deformation of the battery cells 21.

[0082] Reference Figure 7 and Figure 8According to some embodiments of the present invention, the cell buffer layer 211 is a foam layer. For example, the cell buffer layer 211 can be an XPP foam layer. By making the cell buffer layer 211 a foam layer, since foam has a good ability to absorb deformation and buffer, the cell buffer layer 211 can have a good deformation capacity, thus enabling the cell buffer layer 211 to better absorb and buffer the expansion deformation of the battery cell 21.

[0083] Reference Figure 7 and Figure 8 In some embodiments, in the second direction, the cell buffer layer 211 is located between two adjacent battery cells 21, and in the first direction and the third direction, the side of the cell buffer layer 211 does not protrude beyond the side of the battery cell 21 located on the same side. The first direction, the second direction, and the third direction intersect each other. By ensuring that the side of the cell buffer layer 211 does not protrude beyond the side of the battery cell 21 located on the same side in the first direction and the third direction, interference with the tooling or housing 1 can be avoided by preventing the cell buffer layer 211 from protruding beyond the end of the battery cell 21 in the first direction or the third direction, thus making the assembly of the cell buffer layer 211 and the battery cell 21 as a whole smoother.

[0084] Reference Figure 7 and Figure 8 In some embodiments, in the first direction, the distance between the side edges of the large surface 212 of the cell buffer layer 211 on the same side is b1, and the size of b1 ranges from 3mm to 5mm. For example, the size of b1 can be 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc. By making the distance b1 between the side edges of the large surface 212 of the cell buffer layer 211 on the same side range from 3mm to 5mm, a certain distance can be maintained between the side edges of the large surface 212 of the cell buffer layer 211 on the same side in the first direction. This avoids the cell buffer layer 211 protruding from the end of the battery cell 21 in the first direction and interfering with the tooling or housing 1. It also allows for a certain assembly error in the cell buffer layer 211, making the assembly of the cell buffer layer 211 on the battery cell 21 smoother.

[0085] Reference Figure 7 and Figure 8In some embodiments, in the third-party direction, the side of the large surface 212 includes a first side 2121 and a second side 2122. The first side 2121 is located on the side of the large surface 212 near the open opening of the housing 1, and the second side 2122 is located on the side of the large surface 212 near the bottom of the housing 1. The distance between the second side 2122 and the side of the battery cell plug-in plate located on the same side is b2, and the distance between the first side 2121 and the side of the battery cell plug-in plate located on the same side is b3. The size of b2 ranges from 2mm to 4mm, and the size of b3 ranges from 4mm to 6mm. For example, the size of b2 can be 2mm, 2.5mm, 3mm, 3.5mm, 4mm, etc., and the size of b3 can be 4mm, 4.5mm, 5mm, 5.5mm, 6mm, etc.

[0086] By making the distance b2 between the second side 2122 and the side of the cell plug on the same side range from 2mm to 4mm, and the distance b3 between the first side 2121 and the side of the cell plug on the same side range from 4mm to 6mm, in the third direction, there can be a certain distance between the side of the large surface 212 of the cell buffer layer 211 that is close to the same side and the side of the large surface 212, so as to avoid the cell buffer layer 211 protruding from the end of the battery cell 21 in the third direction and interfering with the tooling or housing 1. It can also allow for a certain assembly error of the cell buffer layer 211, so that the assembly of the cell buffer layer 211 on the battery cell 21 is smoother.

[0087] Reference Figure 7 and Figure 8 According to some embodiments of the present invention, the side of the battery module 2 opposite to the module insert plate 3 along the first direction is fixedly connected to the housing 1 by the second adhesive layer 42, which makes the connection between the battery module 2 and the housing 1 simple and has strong stability.

[0088] Reference Figure 7 and Figure 8 According to some embodiments of the present invention, the battery module 2 is fixedly connected to the housing 1 along the third direction by a third adhesive layer 43, and the first direction intersects with the third direction. This makes the connection between the battery module 2 and the housing 1 simple and has strong stability.

[0089] Reference Figure 7 and Figure 8According to some embodiments of the present invention, the second adhesive layer 42 is a foamed adhesive layer. By making the second adhesive layer 42 a foamed adhesive layer, the deformation characteristics of the foamed adhesive layer itself can be used to fill the gap between the battery module 2 and the housing 1 more fully, effectively enhancing the stability and reliability of the connection between the battery module 2 and the housing 1; furthermore, the foamed adhesive layer can also absorb vibration and impact, weaken the vibration transmission between the housing 1 and the battery module 2, and effectively reduce the deformation or frictional wear of the battery module 2.

[0090] For example, in the third direction, when the housing 1 is deformed by an external impact, by making the second adhesive layer 42 a foam layer, the foam layer can absorb the energy of the external impact through collapse deformation, effectively reducing the degree of squeezing and intrusion of the housing 1 deformation on the battery module 2, and playing a certain protective effect on the structure of the battery module 2, so that the structure of the battery module 2 is relatively intact.

[0091] Reference Figure 7 and Figure 8 According to some embodiments of the present invention, the third adhesive layer 43 is a thermally conductive structural adhesive layer, and the housing 1 includes a cold plate, with the third adhesive layer 43 connected to the cold plate. By connecting the third adhesive layer 43 to the cold plate, a fixed connection between the battery module 2 and the cold plate can be achieved, which facilitates the cold plate in regulating the temperature of the battery module 2, thereby improving the service life of the battery module 2.

[0092] For example, the heat generated by the battery module 2 can be transferred to the cold plate to reduce the temperature of the battery module 2 and achieve heat dissipation. Alternatively, when the ambient temperature is low, the heat released by the cold plate can be transferred to the battery module 2 to heat the battery module 2 so that the battery module 2 can work normally in a low-temperature environment.

[0093] Furthermore, the third adhesive layer 43 is a thermally conductive structural adhesive layer. The thermally conductive structural adhesive layer has a strong thermal conductivity and can play a role in conducting and transferring the heat generated by the battery cell 21 of the battery module 2, which is beneficial to improving the heat dissipation efficiency of the battery module 2. It can also transfer the heat released by the cold plate to the battery module 2 through the thermally conductive structural adhesive layer to quickly heat the battery cell 21.

[0094] Reference Figure 7 and Figure 8In some embodiments, on the third-party side, the side of the housing 1 facing the battery cell 21 is provided with multiple sets of limiting ribs 44. These multiple limiting ribs 44 are arranged at intervals along the first direction. The battery cell 21 is supported on at least one set of limiting ribs 44. The limiting ribs 44 can support the battery cell 21, and the height of the limiting ribs 44 protruding from the inner surface of the housing 1 allows for a certain amount of space to be reserved for the third adhesive layer 43, ensuring that the third adhesive layer 43 has a certain height to facilitate heat transfer to the battery cell 21 and prevent the battery cell 21 from excessively encroaching on the space of the third adhesive layer 43. Furthermore, the limiting ribs 44 can enhance the structural strength of the housing 1 to a certain extent.

[0095] Each set of limiting ribs 44 includes multiple limiting ribs 441, which are arranged at intervals along the first direction. This makes the force distribution of the limiting ribs 44 more uniform, reduces the possibility of deformation or even damage of a single limiting rib 441 due to excessive force, helps to extend the service life of the limiting ribs 441, and also enhances the support strength of the limiting ribs 44 to the battery cell 21.

[0096] Reference Figure 13 According to a second aspect embodiment of the present invention, the electrical device 1000 includes the battery device 100 according to the first aspect embodiment of the present invention described above.

[0097] Optionally, the electrical device 1000 can be a vehicle; for example, the battery device 100 can be located at the bottom of the vehicle body 200.

[0098] According to the embodiments of the present invention, the power device 1000, by providing the above-mentioned battery device 100, has a better working life and performance, which is beneficial to improving the performance of the power device 1000.

[0099] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they can be understood as limitations on this invention.

[0100] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0101] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0102] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0103] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that, include: Box; Multiple battery modules are disposed inside the housing, and at least some of the battery modules are arranged sequentially along a first direction; In the first direction, the module insert is sandwiched between two adjacent battery modules, and the module insert is connected to both adjacent battery modules.

2. The battery device according to claim 1, characterized in that, At least a portion of the module insert is made of polymer material.

3. The battery device according to claim 1, characterized in that, The module insert includes an insert body and a module buffer layer. The module buffer layer is located on opposite sides of the insert body along a first direction, and the hardness of the module buffer layer is less than that of the insert body.

4. The battery device according to claim 3, characterized in that, The insert plate body is made of metal or polymer, and the module buffer layer is made of polymer.

5. The battery device according to claim 4, characterized in that, The insert plate body is an epoxy resin component; and / or, the module buffer layer is a foam layer.

6. The battery device according to claim 3, characterized in that, The module buffer layer includes two rows of foam groups, which are respectively located at both ends of the insert body along a third direction. Each row of foam groups includes multiple foam strips spaced apart along a second direction. The first direction, the second direction, and the third direction intersect each other.

7. The battery device according to claim 3, characterized in that, The thickness of the insert body along the first direction is in the range of 0.9mm to 1.1mm; and / or, when the module buffer layer is in its natural state, the thickness of the module buffer layer along the first direction is in the range of 0.4mm to 0.7mm.

8. The battery device according to claim 3, characterized in that, The thickness of the insert body along the first direction is greater than the thickness of the module buffer layer along the first direction.

9. The battery device according to claim 1, characterized in that, The module insert plate is bonded and fixed to the battery module through a first adhesive layer; The first adhesive layer is a potting compound layer.

10. The battery device according to claim 1, characterized in that, The length of the battery module along the second direction is a1, and the length of the module insert along the second direction is a2. a1 and a2 satisfy: 8mm≤a1-a2≤12mm. The second direction intersects with the first direction. And / or, the height dimension of the battery module along the third direction is h1, and the height dimension of the module insert along the third direction is h2, h1 and h2 satisfy: h1≥h2≥0.5h1, and the first direction, the second direction and the third direction intersect each other.

11. An electrical appliance, characterized in that, include: The battery device according to any one of claims 1-10.

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