Battery and engineering vehicle

Abstract

The invention relates to a battery and an engineering vehicle, the battery comprises at least two layers of battery packs (100) which are arranged in a stacked mode, and each battery pack (100) comprises a box body (10), a partition plate assembly (30) and at least two battery cell modules (20). The box body (10) comprises a frame (11) and a heat exchange plate (12), the heat exchange plate (12) is connected to the bottom of the frame (11), and a containing space is defined by the frame (11) and the heat exchange plate (12); the partition plate assembly (30) is arranged in the containing space and connected with the heat exchange plate (12) so as to divide the containing space into at least two sub-spaces, and one battery cell module (20) is contained in each sub-space. Wherein the distance between the end, far away from the heat exchange plate (12), of the partition plate assembly (30) and the heat exchange plate (12) of the adjacent battery pack (100) is smaller than or equal to a preset distance, or the end, far away from the heat exchange plate (12), of the partition plate assembly (30) is connected with the heat exchange plate (12) of the adjacent battery pack (100). The engineering vehicle comprises the battery.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery and an engineering vehicle. Background Art

[0002] As the electrification of construction machinery accelerates, the industry is urgently demanding the development of ultra-high-capacity power battery systems, driven by their continuous operation and low-frequency charging requirements. To overcome the energy limitations of a single battery pack, the industry has developed a multi-layer battery system stacked in series, increasing overall capacity through three-dimensional integration.

[0003] However, construction machinery often faces harsh working conditions such as extreme terrains in mountains and plateaus, as well as heavy loads and high-intensity operations, which pose severe challenges to the safety of the battery system: when the stacking height of the battery system increases, the pressure and stress on the lower batteries will also increase accordingly, which may cause the battery casing to deform, rupture or damage the internal structure, and the stability of the entire battery system will also deteriorate accordingly.

[0004] It should be noted that the information disclosed in the background technology section of the present invention is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of implication that the information constitutes prior art already known to those skilled in the art. Summary of the Invention

[0005] The present invention provides a battery and an engineering vehicle, which optimize the structure of the battery and improve the stability of the overall structure.

[0006] According to one aspect of the present invention, there is provided a battery comprising at least two stacked battery packs, the battery pack comprising:

[0007] The box body includes a frame and a heat exchange plate, wherein the heat exchange plate is connected to the bottom of the frame, and the frame and the heat exchange plate enclose an accommodating space;

[0008] At least two battery cell modules are disposed in the accommodating space; and

[0009] A partition assembly is disposed in the accommodating space and connected to the heat exchange plate to divide the accommodating space into at least two subspaces, each subspace containing a battery module;

[0010] The distance between the end of the partition assembly away from the heat exchange plate and the heat exchange plate of the adjacent battery pack is less than or equal to the preset distance, or the end of the partition assembly away from the heat exchange plate is connected to the heat exchange plate of the adjacent battery pack.

[0011] In some embodiments, the battery pack further includes a cover plate connected to the top of the frame, and a side of the cover plate facing the accommodating space is connected to the partition assembly.

[0012] In some embodiments, the heat exchange plate is sealed to the bottom of the frame, and the cover plate is sealed to the top of the frame.

[0013] In some embodiments, one end of the partition assembly away from the heat exchange plate is coated with structural adhesive so as to bond the partition assembly to the heat exchange plate of an adjacent battery pack through the structural adhesive.

[0014] In some embodiments, a surface of one end of the partition assembly away from the heat exchange plate is provided with a groove, and the groove is used to accommodate at least a portion of the structural adhesive.

[0015] In some embodiments, the partition assembly includes a first partition and a second partition, the first partition is connected to the heat exchange plate, and the second partition is detachably connected to the end of the first partition away from the heat exchange plate. In the sub-space, a buffer space is formed between the frame, the first partition and the battery cell module, and the buffer space is filled with potting glue.

[0016] In some embodiments, the partition assembly also includes a first bolt, a through connecting hole is provided on the second partition, a threaded hole coaxial with the connecting hole is provided on the first partition, the first bolt passes through the connecting hole and is threadedly connected to the threaded hole to connect the first partition and the second partition.

[0017] In some embodiments, the battery cell module includes multiple battery cells, each of which is provided with a pole, an explosion-proof valve, and an injection valve. The distance between the end of the first partition away from the heat exchange plate and the heat exchange plate is less than the minimum distance between any one of the pole, explosion-proof valve, and injection valve and the heat exchange plate.

[0018] In some embodiments, the outlet of the explosion-proof valve faces the second partition.

[0019] In some embodiments, the top of the frame is provided with a top flange arranged around its edge, and the bottom of the frame is provided with a bottom flange arranged around its edge, the top flange is used to connect with the bottom flange of an adjacent battery pack, and the bottom flange is used to connect with the top flange of an adjacent battery pack.

[0020] In some embodiments, the battery pack further includes a plurality of second bolts, a plurality of first through holes are provided on the top flange, and a plurality of second through holes corresponding to the positions of the first through holes are provided on the bottom flange. Each second bolt passes through a first through hole and a second through hole corresponding to the positions in adjacent battery packs to connect the top flanges and bottom flanges of two adjacent battery packs.

[0021] In some embodiments, the battery pack further includes a locking washer disposed between the bolt head of the second bolt and the top flange or the bottom flange pressed by the bolt head.

[0022] According to another aspect of the present invention, there is provided an engineering vehicle comprising the above-mentioned battery.

[0023] Based on the above technical solution, the present invention provides a battery having a stacked battery pack, wherein a partition assembly is provided in the box of the battery pack. In the present invention, the distance between the end of the partition assembly away from the heat exchange plate at the bottom of the box and the heat exchange plate of the adjacent battery pack is less than or equal to a preset distance, or the end of the partition assembly away from the heat exchange plate at the bottom of the box is connected to the heat exchange plate of the adjacent battery pack. Thus, when the battery undergoes local deformation under the influence of its own gravity or impact by external forces, especially when the heat exchange plate of the upper battery pack is deformed, the partition assembly of the lower layer can come into direct or indirect contact with the heat exchange plate of the upper layer, thereby providing support for the upper battery pack, avoiding further serious deformation of the heat exchange plate that damages its own structure, and thus ensuring the reliability and stability of the overall structure of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 FIG. 1 is a schematic structural diagram of a battery in one embodiment of the present invention.

[0026] Figure 2 A schematic structural diagram of a battery pack in one embodiment of the present invention is shown.

[0027] Figure 3 A schematic structural diagram of a battery pack in another embodiment of the present invention is shown.

[0028] Figure 4 An exploded view of a battery pack according to an embodiment of the present invention is shown.

[0029] Figure 5 A schematic structural diagram of a partition assembly in one embodiment of the present invention is shown.

[0030] Figure 6 A schematic structural diagram of the second partition in one embodiment of the present invention is shown.

[0031] Figure 7 A schematic structural diagram of a battery pack in another embodiment of the present invention is shown.

[0032] Figure 8 The figure shows the arrangement of cells in a cell module according to one embodiment of the present invention.

[0033] Figure 9 A diagram showing the arrangement of cells in a cell module according to another embodiment of the present invention is shown. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0036] As the electrification of construction machinery accelerates, the demand for ultra-high power, high safety, and compact space is growing. This has led the industry to propose multi-layer battery stacking technology. Some related technologies employ external support structures to enhance the structural strength of stacked batteries, but this significantly increases the overall weight and volume of the battery system, sacrificing the core advantage of stacking technology, high energy density.

[0037] Based on this, the present invention provides a battery, especially a battery with a multi-layer stacked structure, which ensures the overall structural strength of the battery while preventing a significant increase in the weight and volume of the battery.

[0038] refer to Figure 1 、 Figure 2 and Figure 3 As shown, in some embodiments of the present invention, the battery includes at least two stacked battery packs 100. The battery pack 100 includes a box 10, at least two battery cell modules 20 and a separator assembly 30. Figure 4 The box body 10 includes a frame 11 and a heat exchange plate 12. The heat exchange plate 12 is connected to the bottom of the frame 11. The frame 11 and the heat exchange plate 12 enclose a storage space. Here, the heat exchange plate 12 constitutes the bottom of the box body 10, and the frame 11 constitutes the side of the box body 10. The battery cell module 20 is arranged in the storage space. The partition assembly 30 is arranged in the storage space and connected to the heat exchange plate 12 to divide the storage space into at least two subspaces. A battery cell module 20 is accommodated in each subspace. The distance between the end of the partition assembly 30 away from the heat exchange plate 12 and the heat exchange plate 12 of the adjacent battery pack 100 is less than or equal to the preset distance, or the end of the partition assembly 30 away from the heat exchange plate 12 is connected to the heat exchange plate 12 of the adjacent battery pack 100.

[0039] In ultra-large capacity batteries, especially those used in engineering machinery, there is a high demand for the capacity of a single battery pack 100, so the area of ​​the box 10 also needs to be designed to be correspondingly larger, which in turn results in a larger overall span of the heat exchange plate 12 in the length or width direction, which is not conducive to ensuring its structural stability. Moreover, when multiple battery packs 100 are stacked, the structural stability of a single battery pack 100 will also affect the structural stability of the battery as a whole. Based on this, the present invention provides a partition assembly 30 in the battery pack 100, which not only serves to separate the multiple battery cell modules 20 in the accommodating space of the box 10, but also provides support for the overall structure of the battery pack 100.

[0040] Specifically, during the use of the battery, it may be affected by its own weight or external impact force, and local structural imbalance may occur. For example, in the vertical direction, the heat exchange plate 12 of the upper battery pack 100 may deform downward. In this case, the partition assembly 30 can provide support for the upper battery pack 100 through its contact with the heat exchange plate 12, thereby preventing the heat exchange plate 12 from undergoing severe deformation that would damage its own structure, thereby ensuring the reliability and stability of the overall structure of the battery. And because the partition assembly 30 is arranged in the accommodation space of the battery pack 100 and is also located inside the battery as a whole, it does not increase the overall volume of the battery while providing support, which helps to achieve a compact design of the battery. Optionally, the partition assembly 30 can be made of lightweight materials, or a hollow structure can be provided in the partition assembly 30 to reduce its weight while ensuring that it has sufficient structural strength, thereby helping to achieve a lightweight design of the battery.

[0041] In some of the above-mentioned embodiments, the end of the partition assembly 30 away from the heat exchange plate 12 is connected to the heat exchange plate 12 of the adjacent battery pack 100, so that the partition assembly 30 in each battery pack 100 can continuously provide support to the adjacent battery pack 100, which helps to improve the overall structural strength of the battery.

[0042] In some examples, such as Figure 5 As shown, one end of the partition assembly 30 away from the heat exchange plate 12 is coated with a structural adhesive 50 so as to bond the partition assembly 30 to the heat exchange plate 12 of the adjacent battery pack 100 through the structural adhesive 50 .

[0043] Optionally, the structural adhesive 50 is a high-strength thermal conductive structural adhesive that can provide sufficient thermal conductivity and sufficient connection strength.

[0044] In some examples, such as Figure 6As shown, a groove 301 is provided on the surface of one end of the partition assembly 30 away from the heat exchange plate 12 , and the groove 301 is used to accommodate at least a portion of the structural adhesive 50 .

[0045] During the stacking and assembly of multiple battery packs 100, the groove 301 can limit the structural adhesive 50, improve the assembly accuracy, and facilitate standardized control of mass production. In addition, the groove 301 has a concave surface, which increases the contact area between the structural adhesive 50 and the partition assembly 30, thereby improving its bonding strength and shear resistance, and further enhancing the stability of the interlayer connection between adjacent battery packs 100. Specifically, during the assembly process, glue is first applied to the groove 301 so that the structural adhesive 50 is in a convex state in the groove 301. When another battery pack 100 is stacked on the partition assembly 30 of a battery pack 100 that has been glued, the convex structural adhesive 50 will be flattened by the heat exchange plate 12 of the upper battery pack 12, as shown in FIG. Figure 6 As shown, the structural adhesive 50 covers the top surface of the partition assembly 30 to ensure that the top side of the partition assembly 30 is stably bonded to the bottom side of the heat exchange plate 12 of the adjacent battery pack 100 .

[0046] In some other embodiments described above, the distance between the end of the partition assembly 30 away from the heat exchange plate 12 and the heat exchange plate 12 of the adjacent battery pack 100 is less than or equal to the preset distance. Then, when the heat exchange plate 12 deforms downward, it can abut against the partition assembly 30 within the preset distance. At this time, the partition assembly 30 can support the deformed heat exchange plate 12, thereby preventing the heat exchange plate 12 from further deformation that may cause structural damage. Leaving a certain preset distance between the partition assembly 30 and the heat exchange plate 12 of the upper battery pack 100 also leaves a certain deformation margin. When the battery is subjected to external impact, a certain degree of controllable deformation of the internal structure of the battery can buffer the impact force and reduce the impact damage to the battery. Here, the size of the preset distance can be adjusted according to actual conditions. For example, different sizes of preset distances can be set according to battery packs 100 of different weights and heat exchange plates 12 of different materials. Furthermore, according to different requirements (such as sealing protection, thermal management, electrical connection, mechanical support, etc.), other components can be set between the partition assembly 30 and the heat exchange plate 12 of the upper battery pack 100.

[0047] In some embodiments, as Figure 4 As shown, the battery pack 100 further includes a cover plate 40, which is connected to the top of the frame 11, and the side of the cover plate 40 facing the accommodating space is connected to the partition assembly 30. In embodiments provided with the cover plate 40, when the heat exchange plate of the upper battery pack 100 deforms, the cover plate 40 of the lower battery pack 100 can support it.

[0048] The cover plate 40 creates a relatively enclosed space within the battery pack 100, facilitating thermal management of the individual battery packs 100. Furthermore, the protective effect of the cover plate 40 reduces the ingress of external pollutants such as dust and moisture into the battery pack 100, thereby enhancing the battery's protection level. This effectively ensures the battery's operational reliability, particularly when operating in harsh environments.

[0049] Here, there are various options for connecting the cover plate 40 and the partition assembly 30, such as bolt connection, bonding, snap connection, etc. Optionally, the end of the partition assembly 30 away from the heat exchange plate 12 is coated with structural adhesive 50 to bond the partition assembly 30 and the cover plate 40 together.

[0050] In some embodiments, the heat exchange plate 12 is sealed to the bottom of the frame 11 , and the cover plate 40 is sealed to the top of the frame 11 .

[0051] Based on this, a single battery pack 100 can be sealed, while also improving the structural integrity of the individual battery packs 100. During the battery production and use cycle, battery pack 100 stacking, disassembly, and airtightness testing can all be performed on a single pack basis, effectively increasing the flexibility of battery manufacturing and subsequent maintenance processes.

[0052] According to the battery pack 100 of the embodiment of the present invention, its housing 10, partition assembly 30, and cover plate 40 can be made of aluminum or aluminum alloy. This ensures the structural strength of the battery pack 100 while keeping its overall weight low, thus contributing to a lightweight design of the battery.

[0053] In the battery pack 100 according to the embodiment of the present invention, the heat exchange plate 12 is used to achieve heat exchange with the battery cell module 20. For example, the heat exchange process can cool or heat the battery cell module 20. The present invention does not limit the specific structure of the heat exchange plate 12 or the specific method for achieving heat exchange.

[0054] In some implementations, a heat exchange medium circulates within the heat exchange plate 12 to exchange heat with the battery cell module 20 to cool or heat the battery cell module 20. When the battery operating temperature is high, coolant can be introduced into the heat exchange plate 12 to cool the battery cell module 20 to ensure operational safety and reliability. Of course, when the ambient temperature is low, a higher temperature medium can also be introduced into the heat exchange plate 12 to heat the battery cell module 20 to improve battery efficiency.

[0055] Optional, such as Figure 4As shown, thermally conductive adhesive 80 is applied between the cell module 20 and the heat exchange plate 12. The thermally conductive adhesive 80 bonds the cell module 20 and the heat exchange plate 12 and conducts heat. Furthermore, the thermally conductive adhesive 80 can be made of an adhesive with high thermal conductivity and a certain structural strength to ensure sufficient connection strength between the cell module 20 and the heat exchange plate 12 while achieving heat conduction.

[0056] Batteries according to embodiments of the present invention may include multiple layers of battery packs 100, such as two, three, four, five, or even more layers. The number of layers of battery packs 100 stacked in the battery can be flexibly adjusted based on the required battery power, the power of a single-layer battery pack 100, and the structural layout requirements of the battery or battery pack 100.

[0057] According to an embodiment of the present invention, the battery pack 100 may include multiple cell modules 20, such as two, three, four, or even more. The number and layout of the subspaces within the battery pack 100 for accommodating the cell modules 20 also offer a variety of options to accommodate different battery applications. For example, the battery pack 100 may be designed to adapt to the internal spatial layout of the construction machinery or vehicle in which it is to be installed.

[0058] For some implementations, see Figure 2 A battery pack 100 includes three battery cell modules 20 arranged side by side. Optionally, the battery pack 100 includes two spacer assemblies 30 arranged at intervals to divide the internal accommodation space thereof into three sub-spaces arranged side by side.

[0059] For other implementations, see Figure 3 A battery pack 100 includes four battery cell modules 20, and the four battery cell modules 20 are arranged in two rows and two columns.

[0060] In practical applications, the spacing between the partition assemblies 30, or the length or width of the subspaces formed by the partition assemblies 30, can be adjusted according to the design requirements of the battery pack 100. It is sufficient to ensure that the battery pack 100 has sufficient structural strength while meeting the layout requirements of the battery cell modules 20.

[0061] In some examples, the distance between two adjacent parallel partition assemblies 30 is 560 mm to 600 mm. In some examples, the distance between the battery cell module 20 and the partition assembly 30 or the frame 11 in its circumferential direction is 20 mm to 30 mm.

[0062] In some embodiments, as Figure 4 、 Figure 5 and Figure 7As shown, the partition assembly 30 includes a first partition 31 and a second partition 32. The first partition 31 is connected to the heat exchange plate 12, and the second partition 32 is detachably connected to the end of the first partition 31 away from the heat exchange plate 12. In the sub-space, a buffer space is formed between the frame 11, the first partition 31 and the battery cell module 20, and the buffer space is filled with potting glue 60.

[0063] The potting compound 60 has a certain structural strength and a certain degree of deformation ability when subjected to external forces. The placement of the potting compound 60 within the buffer space helps strengthen the integrity of the components within the battery pack 100, providing both fixation and cushioning, thereby improving the overall resistance of the battery pack 100 to external impact and vibration.

[0064] Designing the partition assembly 30 to include a first partition 31 and a second partition 32 that is detachable relative to the first partition 31 helps to improve the assembly convenience of the battery pack 100 during the production process on the one hand, and helps to improve the maintainability of various components inside the battery pack 100 (such as the battery cell module 20) on the other hand.

[0065] For example, in some examples, the first partition 31 can be used to limit the filling height of the potting compound 60. During the actual assembly process of the battery pack 100, the potting compound 60 generally needs to be poured according to a predetermined height to ensure that it can effectively play a buffering and protective role without affecting the assembly of other components or subsequent work due to overfilling. Optionally, the first partition 31 can be pre-installed on the heat exchange plate 12 (for example, welded to the heat exchange plate 12) before the potting compound 60 is filled. After the potting compound 60 is filled, the second partition 32 is connected to the first partition 31. Here, the edge of the first partition 31 can naturally form a physical boundary during the potting process, limiting the upper limit of the filling of the potting compound 60.

[0066] For example, in some examples, during the use of the battery, the cell module 20 needs to be repaired. At this time, the second partition 32 can be removed to provide sufficient space for maintenance between adjacent cell modules 20. After the maintenance is completed, the second partition 32 can be reinstalled.

[0067] In the embodiment of the present invention, the connection method between the first partition plate 31 and the second partition plate 32 is not limited and can be selected according to actual conditions.

[0068] In some embodiments, as Figure 5 As shown, the partition assembly 30 also includes a first bolt 33, a through connecting hole is provided on the second partition 32, and a threaded hole coaxial with the connecting hole is provided on the first partition 31. The first bolt 33 passes through the connecting hole and is threadedly connected to the threaded hole to connect the first partition 31 and the second partition 32.

[0069] Here, the first separator 31 and the second separator 32 may be configured to have Figure 5 The hollow internal structure shown can, on the one hand, reduce the overall weight of the partition assembly 30, and on the other hand, facilitate the connection structure (such as the first bolt 33) used to connect the two to be at least partially set inside the first partition 31 and the second partition 32, thereby reducing the installation space occupied by the entire partition assembly 30.

[0070] In some embodiments, the battery cell module 20 includes a plurality of battery cells 21. Figure 8 and Figure 9 As shown, the battery cell 21 is provided with a pole 211, an explosion-proof valve 212 and a liquid injection valve 213, and the distance between the end of the first partition 31 away from the heat exchange plate 12 and the heat exchange plate 12 is less than the minimum distance between any one of the pole 211, the explosion-proof valve 212 and the liquid injection valve 213 and the heat exchange plate 12.

[0071] Based on this, the first separator 31 serves to physically separate the battery cell modules 20 and, in some embodiments, to limit and control the potting compound 60 in the buffer space. Furthermore, the first separator 31 does not interfere with operations such as terminal connection, gas exhaust, and electrolyte injection in the battery cells 21.

[0072] In some embodiments, as Figure 4 As shown, the battery module 20 further includes a pull plate 22. The pull plate 22 is bonded to the same side of multiple battery cells 21 in a battery module 20, which helps to improve the structural integrity of the battery module 20. Figure 4 As shown, a structural adhesive 50 is applied between the pull plate 22 and the plurality of battery cells 21, so as to bond the pull plate 22 to the plurality of battery cells 21 through the structural adhesive 50. The structural adhesive 50 may be, for example, a high-strength thermally conductive structural adhesive.

[0073] refer to Figure 8 As shown, in some examples, the battery cell 21 is arranged with the explosion-proof valve 212 and the injection valve 213 above the pole 211. In this case, the upper edge of the first separator 31 can be set below the pole 211, thereby controlling the potting compound 60 to be injected below the pole 211.

[0074] refer to Figure 9 As shown, in other examples, the battery cell 21 is arranged with the explosion-proof valve 212 and the injection valve 213 below the electrode 211. In this case, the upper edge of the first partition 31 can be set below the explosion-proof valve 212 and the injection valve 213, thereby controlling the potting compound 60 to be injected below the valve openings of the explosion-proof valve 212 and the injection valve 213.

[0075] As some implementations, the polarities of the poles 211 provided on two adjacently arranged battery cells 21 are opposite. Figure 9 In the example shown, the pole provided on the left battery cell 21 is a positive pole 211 a , and the pole provided on the right battery cell 21 is a negative pole 211 b .

[0076] In some embodiments, the outlet of the explosion-proof valve 212 faces the second partition 32 .

[0077] During battery operation, the internal pressure of a cell 21 may abnormally increase. In this case, the explosion-proof valve 212 releases pressure, and the ejected electrolyte or other gaseous substances directly impacts the second separator 32. The second separator 32 effectively prevents further splashing of the ejected substances, thereby preventing the normal operation of the cell module 20 in the adjacent subspace from being affected. Furthermore, by observing or detecting the distribution of the electrolyte ejected onto the surface of the second separator 32, it is also possible to effectively determine whether the cell 21 at the corresponding position in the cell module 20 has experienced an abnormality or failure.

[0078] In some embodiments, reference Figure 1 As shown, the top of the frame 11 is provided with a top flange 111 arranged around its edge, and the bottom of the frame 11 is provided with a bottom flange 112 arranged around its edge. The top flange 111 is used to connect with the bottom flange 112 of the adjacent battery pack 100, and the bottom flange 112 is used to connect with the top flange 111 of the adjacent battery pack 100.

[0079] That is, in a structure where multiple layers of battery packs 100 are stacked, the bottom flange 112 of a battery pack 100 located in an upper layer is connected to the top flange 111 of an adjacent battery pack 100 located in a lower layer.

[0080] The flange arrangement provides additional support for adjacent battery packs 100, helping to improve the stacking stability of multiple battery packs 100. The bottom flanges 112 and top flanges 111 of adjacent battery packs 100 can be connected in a variety of ways, such as bolting or snap-fit ​​connections, to ensure a secure connection between adjacent battery packs 100 and ensure the stability of the overall battery structure.

[0081] In some embodiments, as Figure 7 As shown, the battery pack 100 further includes a plurality of second bolts 70. The top flange 111 is provided with a plurality of first through-holes, and the bottom flange 112 is provided with a plurality of second through-holes corresponding to the positions of the first through-holes. Each second bolt 70 passes through a first through-hole and a second through-hole corresponding to the positions of adjacent battery packs 100, thereby connecting the top flange 111 and the bottom flange 112 of the two adjacent battery packs 100.

[0082] Here, the number and intervals of the first through holes and the second through holes can be set according to actual conditions to meet the connection requirements between multiple battery packs 100 of different specifications and different layouts.

[0083] In some examples, the distance between two adjacent first through holes on the top flange 111 is set to 160 mm to 200 mm. Optionally, the plurality of first through holes are evenly distributed on the top flange 111.

[0084] In some examples, the distance between two adjacent second through holes on the bottom flange 112 is set to 160 mm to 200 mm. Optionally, the plurality of second through holes are evenly distributed on the bottom flange 112.

[0085] In some examples, the length of the second bolt 70 is set to 40 mm to 50 mm.

[0086] In some embodiments, the battery pack 100 further includes a locking washer disposed between the bolt head of the second bolt 70 and the top flange 111 or bottom flange 112 against which the bolt head presses. The locking washer increases friction to prevent the second bolt 70 from loosening due to impact or vibration, thereby ensuring the reliability of the connection between the battery packs 100 layers.

[0087] In some embodiments, a raised positioning pin 1101 is provided on the top flange 111 of the frame 11, and a positioning hole corresponding to the position of the positioning pin 1101 is provided on the bottom flange 112. During the stacking and assembly of multiple battery packs 100, the positioning pin 1101 cooperates with the positioning hole to assist in positioning adjacent battery packs 100. Figure 1 As shown, the frame 11 is provided with two positioning pins 1101 at diagonal positions.

[0088] In some embodiments, as Figure 7 As shown, the frame 11 includes a first panel 101 and a second panel 102 arranged opposite each other. The first panel 101 can serve as an interface for the battery pack 100 or a mounting panel for valve components. Components such as the coolant inlet / outlet, explosion-proof valve, high-voltage connector, and low-voltage connector can be located on the first panel 101, facilitating centralized layout of the battery pack 100's wiring harness based on the first panel 101.

[0089] In some embodiments, as Figure 1 and Figure 7As shown, the frame 11 also includes a third panel 103 connected between the first panel 101 and the second panel 102. The third panel 103 is provided with a hook hole 103a and a bolt mounting hole 103b. During the battery assembly process, the battery pack 100 can be hoisted through the hook hole 103a. When connecting adjacent battery packs 100, the bolt mounting holes 103b can be used to tighten bolts or nuts.

[0090] Based on the above-mentioned battery, the present invention further provides an engineering vehicle, which includes the above-mentioned battery. The positive technical effects of the battery in each of the above-mentioned embodiments are also applicable to the engineering vehicle and will not be described in detail here.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to preferred embodiments, ordinary technicians in the field should understand that without departing from the principles of the present invention, the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents. These modifications and equivalent replacements should all be included in the scope of the technical solutions claimed for protection by the present invention.

Claims

1. A battery, characterized in that: The invention comprises at least two layers of battery packs (100) arranged in a stacked manner, wherein the battery pack (100) comprises: A box body (10) comprises a frame (11) and a heat exchange plate (12), wherein the heat exchange plate (12) is connected to the bottom of the frame (11), and the frame (11) and the heat exchange plate (12) enclose a receiving space; At least two battery core modules (20) are arranged in the accommodating space; and a partition assembly (30) disposed in the accommodating space and connected to the heat exchange plate (12) to separate the accommodating space into at least two subspaces, each of the subspaces containing one of the battery core modules (20); The distance between the end of the partition assembly (30) away from the heat exchange plate (12) and the heat exchange plate (12) of the adjacent battery pack (100) is less than or equal to a preset distance, or the end of the partition assembly (30) away from the heat exchange plate (12) is connected to the heat exchange plate (12) of the adjacent battery pack (100).

2. The battery according to claim 1, characterized in that The battery pack (100) further comprises a cover plate (40), wherein the cover plate (40) is connected to the top of the frame (11), and a side of the cover plate (40) facing the accommodating space is connected to the partition assembly (30).

3. The battery according to claim 2, characterized in that The heat exchange plate (12) is sealed to the bottom of the frame (11), and the cover plate (40) is sealed to the top of the frame (11).

4. The battery according to claim 1, characterized in that One end of the partition assembly (30) away from the heat exchange plate (12) is coated with structural adhesive (50), so as to bond the partition assembly (30) to the heat exchange plate (12) of the adjacent battery pack (100) through the structural adhesive (50).

5. The battery according to claim 4, characterized in that A surface of one end of the partition assembly (30) away from the heat exchange plate (12) is provided with a groove (301), and the groove (301) is used to accommodate at least a portion of the structural adhesive (50).

6. The battery according to claim 1, characterized in that The partition assembly (30) includes a first partition (31) and a second partition (32), wherein the first partition (31) is connected to the heat exchange plate (12), and the second partition (32) is detachably connected to an end of the first partition (31) away from the heat exchange plate (12). Within the subspace, a buffer space is formed between the frame (11), the first partition (31) and the battery module (20), and the buffer space is filled with potting glue (60).

7. The battery according to claim 6, characterized in that The partition assembly (30) further includes a first bolt (33), a through-connection hole is provided on the second partition (32), a threaded hole coaxial with the connection hole is provided on the first partition (31), and the first bolt (33) passes through the connection hole and is threadedly connected to the threaded hole to connect the first partition (31) and the second partition (32).

8. The battery according to claim 6, characterized in that The battery cell module (20) includes a plurality of battery cells (21), each of the battery cells (21) being provided with a pole (211), an explosion-proof valve (212), and a liquid injection valve (213), and a distance between an end of the first partition (31) away from the heat exchange plate (12) and the heat exchange plate (12) being less than a minimum distance between any one of the pole (211), the explosion-proof valve (212), and the liquid injection valve (213) and the heat exchange plate (12).

9. The battery according to claim 8, characterized in that The outlet of the explosion-proof valve (212) faces the second partition (32).

10. The battery according to claim 1, characterized in that The top of the frame (11) is provided with a top flange (111) arranged around its edge, and the bottom of the frame (11) is provided with a bottom flange (112) arranged around its edge. The top flange (111) is used to connect with the bottom flange (112) of the adjacent battery pack (100), and the bottom flange (112) is used to connect with the top flange (111) of the adjacent battery pack (100).

11. The battery according to claim 10, characterized in that The battery pack (100) further includes a plurality of second bolts (70), the top flange (111) is provided with a plurality of first through holes, the bottom flange (112) is provided with a plurality of second through holes corresponding to the positions of the first through holes, and each second bolt (70) penetrates one of the first through holes and one of the second through holes corresponding to the positions in adjacent battery packs (100) to connect the top flanges (111) and the bottom flanges (112) of two adjacent battery packs (100).

12. The battery according to claim 11, characterized in that The battery pack (100) further includes an anti-loosening washer, which is arranged between the bolt head of the second bolt (70) and the top flange (111) or the bottom flange (112) pressed by the bolt head.

13. An engineering vehicle, characterized in that: The invention comprises a battery as claimed in any one of claims 1 to 12.

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