Battery pack and vehicle

Abstract

The utility model relates to the field of batteries, in particular to a battery pack and a vehicle. The utility model provides a battery pack and a vehicle. The battery pack comprises a box body; the battery module is arranged in the box body, the battery module comprises a plurality of battery cells which are sequentially arranged in the second direction, and an anti-explosion valve is arranged at one end, in the third direction, of each battery cell; wherein at least one side of the battery module along the first direction is provided with a structural sheet, the side surface of the battery cell along the first direction is connected with the structural sheet, and the structural sheet is higher than the end surface of the anti-explosion valve along the third direction. According to the battery pack and the vehicle provided by the utility model, the probability that the electrolyte is sprayed or spread to other positions of the battery module when the battery cell sprays the electrolyte can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery field, concretely relates to a battery pack and vehicle. BACKGROUND

[0002] The battery pack is composed of a box body and battery cells, wherein the box body comprises a bottom plate, side plates and a cover plate, which are tightly matched to jointly form a cavity structure for accommodating the battery cells. A plurality of battery cells are combined into a plurality of battery modules through connection, and the battery modules are arranged in the box body to provide protection for the battery modules.

[0003] However, in the related art, when the internal pressure of the battery cell abnormally rises to or exceeds the preset threshold of the explosion-proof valve, the explosion-proof valve is forced to open to release the high pressure. In this process, the electrolyte in the battery cell may be sprayed out. Once the electrolyte is accidentally sprayed or spread to other positions of the battery module, a series of chain reactions may be triggered, eventually leading to the occurrence of thermal runaway arc phenomenon, which seriously threatens the overall safety of the battery pack.

[0004] Therefore, how to reduce the probability of electrolyte spraying or spreading to other positions of the battery module when the electrolyte of the battery cell is sprayed out has become an important technical problem to be solved by those skilled in the art. SUMMARY

[0005] The utility model provides a battery pack and vehicle, can reduce the probability that electrolyte is sprayed or spread to other positions of battery module when the electrolyte of battery cell is sprayed out.

[0006] In a first aspect, the utility model provides a battery pack, comprising:

[0007] a box body;

[0008] a battery module arranged in the box body, the battery module comprising a plurality of battery cells arranged in a second direction, each battery cell being provided with an explosion-proof valve at one end along a third direction;

[0009] wherein the battery module is provided with a structural sheet on at least one side along a first direction, the side surface of the battery cell along the first direction is connected with the structural sheet, and the structural sheet is higher than the end surface of the explosion-proof valve along the third direction.

[0010] Advantages:

[0011] In this application, the battery pack includes a battery module with multiple battery cells arranged sequentially along a second direction. These cells are connected together by structural plates. Specifically, the cells can be adhered to the structural plates, forming a single unit. By first connecting the cells into a single unit using structural plates, and then installing them into the housing, the battery module can be effectively prevented from deforming due to relative displacement in the direction of gravity caused by the cells' weight during installation, thus improving packing accuracy. Furthermore, in the battery pack provided in this application, the structural plates are positioned between adjacent battery modules, and their height along a third direction is higher than the end face of the explosion-proof valve. When the explosion-proof valve bursts, electrolyte is ejected, and the structural plates act as a barrier, preventing the electrolyte from spreading to other parts of the battery module, thereby reducing the probability of electrolyte spraying or spreading to other parts of the battery module.

[0012] According to the battery pack provided by this utility model, the battery modules are configured as a plurality of battery modules, and the plurality of battery modules are arranged in the housing along the first direction.

[0013] According to the battery pack provided by this utility model, the battery module is provided with the structural pieces on both sides along the first direction, and the battery cell is connected to the structural pieces on both sides along the first direction.

[0014] Beneficial effects:

[0015] The battery module has structural plates on both sides along the first direction, and the battery cells are connected to the structural plates on both sides along the first direction. This makes the connection between the battery cells more stable, the overall integrity of the battery module is stronger, and it can further avoid relative displacement between the battery cells, improve the packing accuracy, and prevent the battery module from deforming when the vehicle is bumpy or vibrating.

[0016] According to the battery pack provided by this utility model, the structural piece is connected to the inner wall of the housing;

[0017] And / or, the inner wall of the box is provided with a reinforcing beam, and the structural piece is connected to the reinforcing beam.

[0018] Beneficial effects:

[0019] It should be noted that, because the battery modules provided in this application are connected to each other via structural plates, they possess good connection strength and integrity, resulting in excellent resistance to deformation for both the battery modules and the battery pack. Based on this, the design of reinforcing beams inside the housing can be reduced or eliminated to improve space utilization. To further enhance the stability of the battery modules within the housing, the structural plates can be connected to the inner wall of the housing or the internal reinforcing beams using welding, screw connections, or adhesive bonding, thereby improving the stability of the battery modules within the housing.

[0020] According to the battery pack provided by this utility model, the cross-sectional shape of the structural piece is "I" or "L" shaped, and the bottom surface of the battery cell partially overlaps the bottom of the structural piece.

[0021] According to the battery pack provided by this utility model, the bottom surface of the battery cell is not attached to the bottom of the structural piece, but is bonded to the bottom plate of the housing.

[0022] According to the battery pack provided by this utility model, the structural piece includes a plurality of sub-structural pieces, and the battery cell is connected to each of the sub-structural pieces along the side of the first direction.

[0023] According to the battery pack provided by this utility model, the structural piece is a solid structure;

[0024] Alternatively, the structural sheet may have a cavity inside, and the cavity may contain a heat-absorbing phase change material.

[0025] Beneficial effects:

[0026] In some embodiments, the structural sheet may be a solid structure. In other embodiments, the structural sheet may also be constructed as a plate with an internal cavity, for example, an aluminum plate filled with a heat-absorbing phase change material. For example, when the internal temperature of the battery pack is high, the heat-absorbing phase change material can absorb heat and change from a first phase to a second phase; when the internal temperature of the battery pack decreases, the heat-absorbing phase change material can release heat and change from the second phase to the first phase. Through the phase change of the phase change material, heat within the battery pack can be quickly absorbed, avoiding the problem of thermal runaway due to excessive temperature.

[0027] According to the battery pack provided by this utility model, a battery module is provided with a battery cell assembly at one end along the third direction, and the battery cells of the battery module are electrically connected through the battery cell assembly.

[0028] The structural piece has clearance openings at both ends along the second direction, which are used to avoid the tab assembly.

[0029] According to the battery pack provided by this utility model, a heat insulation component is provided between adjacent battery cells;

[0030] The thermal insulation component includes a frame and an elastic thermal insulation element, wherein the elastic thermal insulation element is disposed within the frame.

[0031] Secondly, the present invention provides a vehicle comprising the battery pack described in any of the above claims. Attached Figure Description

[0032] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the exploded structure of the battery pack according to an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the battery pack housing and part of the battery module structure according to an embodiment of the present utility model.

[0035] Figure 3 This is a schematic diagram of the exploded structure of the battery module according to an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the overall structure of the battery module according to an embodiment of the present utility model;

[0037] Figure 5 This is a schematic diagram of a structural piece according to another embodiment of the present invention;

[0038] Figure 6 This is a schematic diagram of a structural piece according to another embodiment of the present invention;

[0039] Figure 7 This is a schematic diagram of the connection structure between the structural sheet and the battery cell according to another embodiment of the present invention.

[0040] Explanation of reference numerals in the attached figures:

[0041] 11. Housing; 111. Side panel; 112. Bottom plate; 113. Cover plate; 114. Reinforcing beam; 12. Battery module; 121. Battery cell; 1211. Explosion-proof valve; 122. Structural piece; 1221. Circumvention opening; 1222. Bottom of structural piece; 1223. Sub-structural piece; 123. Bar plate assembly; 124. Mica tape; 125. Thermal insulation component; 1251. Frame; 1252. Elastic thermal insulation component. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0043] When an abnormal pressure occurs in a cell within the battery pack, causing the explosion-proof valve to open, electrolyte is ejected from the cell. If this electrolyte is accidentally sprayed onto other parts of the battery module, such as other sides of the battery module without explosion-proof valves, narrow spaces between battery modules, or spreads to other battery modules, it may trigger a series of chain reactions, ultimately leading to thermal runaway and arcing, posing a serious threat to the overall safety of the battery pack.

[0044] Therefore, embodiments of this utility model provide a battery pack and a vehicle to reduce the probability of electrolyte entering the gaps between battery modules or spreading to other battery modules when electrolyte is sprayed from the battery cell.

[0045] In this embodiment, as Figure 1 As shown, the battery pack has a housing 11 and a battery module 12. Wherein, as... Figure 1 and Figure 2 As shown, the housing 11 can be designed as a robust outer shell, specifically including a base plate 112, side plates 111, and a cover plate 113. The base plate 112 serves as the basic support, and the side plates 111 are vertically arranged around the edge of the base plate 112 and tightly connected to the base plate 112, together forming a cavity with an opening. The cover plate 113 closes the opening of this cavity, ensuring the airtightness of the internal environment of the battery pack.

[0046] The battery module 12 in the battery pack can be configured as a single unit, or multiple units can be configured according to power requirements, such as... Figure 1 and Figure 2 As shown, at least two battery modules 2 are disposed within the battery pack, and at least two battery modules 12 are arranged parallel to each other within the housing 11 along a first direction (e.g., the length direction of the housing 11). Each battery module 12 contains multiple battery cells 121, which are closely arranged along a second direction (e.g., the width direction of the housing 11) to form a compact battery module 12, as shown. Figures 1 to 3 As shown. Each cell 121 is provided with an explosion-proof valve 1211 at one end along a third direction (e.g., the height direction of the housing 11) to release internal pressure and prevent explosion in case of battery malfunction.

[0047] To enhance the structural stability and safety of the battery module 12, this embodiment provides a structural piece 122 on at least one side of the battery module 12 along the first direction. For example, the structural piece 122 can be provided on one side of the battery module 12 along the first direction, or the structural piece 122 can be provided on both sides of the battery module 12 along the first direction.

[0048] In a preferred embodiment, structural pieces 122 can be provided on both sides of the battery module 12 along the first direction. When there are multiple battery modules 12, the structural pieces 122 can be distributed on both sides of any battery module 12, or they can be distributed only between two adjacent battery modules 12.

[0049] These structural pieces 122 are tightly connected to the side of the battery cell 121 along the first direction by adhesive or other fixing methods. It is worth noting that the extension height of the structural pieces 122 in the third direction is intentionally designed to be higher than the end face of the explosion-proof valve 1211. For example, in some embodiments, the height of the structural pieces 122 in the third direction is 1-5 mm higher than the end face of the explosion-proof valve 1211.

[0050] Before the battery cells 121 are assembled into the housing 11, they are first connected into a whole by structural pieces 122. This pre-assembly method significantly reduces the relative displacement of the battery cells 121 in the vertical direction due to gravity during the subsequent installation into the housing 11, thereby effectively avoiding the problem of uneven vertical alignment of multiple battery cells 121 in the battery module 12 and poor consistency after subsequent connection of electrical connectors.

[0051] Meanwhile, since multiple battery cells 121 are connected together by structural pieces 122, the cells 121 are no longer simply arranged together, but form a more compact and integrated battery module 12. Based on this, the number of reinforcing beams 114 within the battery pack can be reduced, thereby increasing the energy density of the battery pack.

[0052] Furthermore, when the explosion-proof valve 1211 of a certain cell 121 opens and releases due to excessive internal pressure, the electrolyte sprayed from the cell 121 will be blocked by the structural plate 122, which is higher than the end face of the explosion-proof valve 1211 in a third direction, preventing it from easily spreading to other parts of the battery module 12. This design greatly reduces the probability of electrolyte seeping into other parts of the battery module 12, thereby reducing the probability of thermal runaway and arcing, and improving the overall safety performance of the battery pack.

[0053] In summary, by introducing structural piece 122 and specially designing its height, the battery pack of this embodiment not only optimizes the assembly process of battery module 12 and improves packing accuracy, but also effectively enhances the safety protection capability of the battery pack.

[0054] In a further embodiment, the battery module 12 is provided with structural pieces 122 on both sides along the first direction, and the battery cell 121 is connected to the structural pieces 122 on both sides along the first direction.

[0055] The battery modules 12 are arranged along a first direction, and each battery module 12 consists of multiple battery cells 121 arranged sequentially along a second direction perpendicular to the first direction. Notably, structural plates 122 are disposed on both sides of the battery module 12 along the first direction. The battery cells 121 can be tightly connected to the structural plates 122 on both sides of the battery module 12 along the first direction using connection methods such as adhesives, bolts, or welding.

[0056] With this configuration, structural plates 122 are connected to both sides of the battery cell 121, significantly enhancing the structural stability between the cells 121. The cells 121 are no longer simply arranged together, but form a more compact and integrated battery module 12. This structure not only improves the connection strength between the cells 121, but also effectively prevents relative displacement of the cells 121 within the battery pack. Even when encountering bumps or vibrations during vehicle operation, the battery module 12 can maintain its original shape and structural integrity, greatly reducing the risk of deformation or damage.

[0057] Furthermore, due to the tight connection between the battery cell 121 and the structural piece 122, the battery module 12 can be positioned more accurately during packaging, avoiding packaging accuracy problems caused by the positional deviation of the battery cell 121. At the same time, the battery cell 121 is tightly connected through the structural piece 122, and the battery cells 121 constrain each other, which can reduce the problem of expansion of the narrow or large surface of the battery cell 121.

[0058] In a further embodiment, since the cells 121 of the battery module 12 are connected by structural pieces 122, they have good connection strength and integrity, giving the battery module 12 and the battery pack good resistance to deformation. Based on this, the design of reinforcing beams 114 inside the housing 11 can be reduced or eliminated to improve the space utilization within the housing 11. In this embodiment, the structural pieces 122 are connected to the inner wall of the housing 11. In some embodiments, the structural pieces 122 are in direct contact with the inner wall surface of the housing 11, and a high-strength connection process such as welding or riveting is used to ensure a tight bond between the two, thereby enhancing the overall stability of the battery module 12 and utilizing the structure of the housing 11 itself as support, reducing the need for additional reinforcing components.

[0059] In another embodiment, to cope with more intensive usage scenarios, such as Figure 1As shown, a reinforcing beam 114 structure is pre-designed inside the box body 11 to improve the bearing capacity and anti-deformation ability of the box body 11. In this embodiment, the structural piece 122 is connected to the reinforcing beam 114. Specifically, a flanging can be provided at the position where the structural piece 122 is close to the reinforcing beam 114, and corresponding connection holes are provided on the reinforcing beam 114. The connection between the two is achieved by bolts inserted into the connection holes. Of course, the connection method between the structural piece 122 and the reinforcing beam 114 is not limited to bolt fastening. In other embodiments, high-strength structural adhesives, riveting, etc. can also be used to ensure a firm connection between the structural piece 122 and the reinforcing beam 114. Such a design not only maintains the high stability of the battery module 12, but also effectively prevents the displacement between the battery cells 121 even under extreme conditions, ensuring the performance and safety of the battery pack.

[0060] In some embodiments, the structural piece 122 can be a flat structure, or the cross-sectional shape of the structural piece 122 is like Figure 5 shown in the "I" shape, or like Figure 6 shown in the "L" shape.

[0061] Among them, the structural piece 122 is designed to be a simple flat shape. This design is relatively simple, easy to manufacture, and easy to assemble with the battery cell 121. In some embodiments, the thickness of the structural piece 122 is from 0.5 to 10 mm. For example, the specific thickness of the structural piece 122 can be 0.5 mm, 1 mm, 5 mm, 10 mm, etc. The height of the structural piece 122 along the third direction can be specifically set according to the actual situation. For example, its height can be 5 mm, 10 mm, 20 mm, etc.

[0062] The cross-sectional shape of the structural piece 122 is set to the "I" shape or the "L" shape. This design increases the rigidity and strength of the structural piece 122, enabling it to better withstand the impacts or vibrations that the battery pack may encounter during use. Moreover, connection structures such as connection holes can be provided at the bottom 1222 of the "I" shape or "L" shape structural piece 122 for connection with the inner wall of the box body 11 or the reinforcing beam 114 inside the box body 11. In this embodiment, the side surface of the battery cell 121 along the first direction is connected to the structural piece, and at the same time, the bottom surface of the battery cell 121 can be partially overlapped on the bottom 1222 of the structural piece 122 to improve the connection reliability between the battery cell 121 and the structural piece 122.

[0063] At the same time, the bottom 1222 of the structural piece 122 can play a supporting role, so that there is a gap between the battery cell 121 and the bottom plate 112 of the box body 11. This gap can be used to accommodate enough structural adhesive to reliably bond the bottom surface of the battery cell 121 to the bottom plate 112 of the box body 11.

[0064] In some embodiments, the structural piece 122 is a solid structure, such as a solid plate-like structure. The solid structural piece 122 can be made of a high-strength, high-thermal-conductivity material, such as aluminum alloy or stainless steel, to ensure both sufficient mechanical strength and effective heat conduction within the battery pack. Of course, in other embodiments, the structural piece 122 can also be made of insulating materials such as silicone foam, PPS, XPP, PC, PA66, or epoxy resin. The solid structural piece 122 provides robust mechanical support, enhances the overall structural strength of the battery pack, and is easy to manufacture and process, reducing production costs.

[0065] In a further embodiment, the structural sheet 122 may have a cavity, within which a heat-absorbing phase change material is disposed. In this embodiment, the structural sheet 122 is designed as a plate-like body with an internal cavity, specifically using an aluminum sheet as the substrate. The aluminum sheet has one or more closed cavities filled with a heat-absorbing phase change material.

[0066] Endothermic phase change materials are selected from substances that exhibit significant phase change characteristics within the normal operating temperature range of the battery pack, such as waxy substances, salt mixtures, or polymeric materials. When the internal temperature of the battery pack rises, the endothermic phase change material absorbs heat and undergoes a phase change (e.g., from solid to liquid), thereby lowering the internal temperature of the battery pack. When the temperature decreases, the phase change material releases heat and returns to its original phase state, achieving both heat storage and release.

[0067] By leveraging the phase change properties of phase change materials, rapid absorption and release of heat within the battery pack are achieved, effectively improving the thermal management performance of the battery pack. It should be noted that both solid structural plates 122 and hollow structural plates 122 have their own advantages in battery pack applications. In practical applications, the appropriate type of structural plate 122 can be selected based on the specific needs and design conditions of the battery pack.

[0068] Furthermore, in some other embodiments, each battery module 12 may have multiple sub-structural pieces 1223 disposed on one side along the first direction, and the multiple sub-structural pieces 1223 constitute a structural piece 122. The multiple sub-structural pieces 1223 are arranged along a third direction, and each sub-structural piece 1223 is connected to the narrow face of the battery cell 121, specifically as follows: Figure 7 As shown, multiple substructure pieces 1223 are arranged on the same side of the cell 121, which can also play a role in stable connection.

[0069] In some embodiments, such as Figures 1 to 3 As shown, a battery module 12 is provided with a flap assembly 123 at one end along a third direction, and the battery cells 121 of the battery module 12 are electrically connected through the flap assembly 123.

[0070] In some embodiments, the electrode assembly 123 includes an electrode and a conductive sheet connected to the electrode. The electrode is typically made of a highly conductive metal, such as copper or aluminum, to ensure good electrical connection. The conductive sheet is connected to the tabs of the battery cell 121, specifically by welding, crimping, or other reliable methods.

[0071] The battery pack assembly 123 is installed at one end of the battery module 12 by welding or fasteners (such as screws, clips, etc.) to ensure a stable connection between the battery pack and the cell 121. By setting the battery pack assembly 123 at one end of the battery module 12, a reliable electrical connection between the cells 121 is achieved, improving the electrical performance of the battery pack.

[0072] In a further embodiment, to avoid mutual interference between the structural piece 122 and the plate assembly 123, clearance openings 1221 may be provided at both ends of the structural piece 122 along the second direction, such as... Figure 3 and Figure 4 As shown, the clearance opening 1221 is used to avoid the tablet assembly 123, and the size of the clearance opening 1221 can be set according to the actual installation position or size of the tablet assembly 123. In other embodiments, if there is no mutual interference between the structural piece 122 and the tablet assembly 123, the structural piece 122 does not need to be provided with the aforementioned clearance opening 1221.

[0073] In a further embodiment, an insulating and heat-insulating material layer is provided on the side of the pad assembly 123 away from the cell 121, and the structural piece 122 is in contact with the insulating and heat-insulating material layer, or a gap is provided between the two. Figure 2 and Figure 3 As shown, the insulating and heat-insulating material layer can specifically be mica tape 124, which is adhered to the side of the battery cell assembly 123 away from the battery cell 121. The structural sheet 122 can be in contact with the mica tape 124, or a certain gap can be provided between the structural sheet 122 and the mica tape 124, for example, a gap of 0.05-0.15 mm.

[0074] In a further embodiment, a heat insulation component 125 is provided between adjacent battery cells 121 to prevent heat transfer between adjacent battery cells 121 and to prevent adjacent battery cells 121 from overheating when a battery cell 121 overheats. In some embodiments, such as Figure 3As shown, the heat insulation component 125 may specifically include a frame 1251 and an elastic heat insulation element 1252, with the elastic heat insulation element 1252 connected within the frame 1251. The elastic heat insulation element 1252 is made of aerogel material. The frame 1251 may be a rectangular frame 1251, made of a rigid polymer material or metal. The aerogel material is fixed within the frame 1251. The aerogel material has good heat insulation properties, reducing heat conduction between the battery cells 121 and heat conduction from the engine to the battery cells 121 in hybrid or range-extended vehicles. Furthermore, when the battery cells 121 expand and deform, the aerogel material can buffer the deformation, preventing compression of adjacent battery cells 121 and avoiding excessive internal pressure within the battery cells 121.

[0075] Furthermore, the bottom plate 112 of the housing 11 can be equipped with a liquid cooling plate, and the bottom surface of each battery cell 121 is connected to the liquid cooling plate. The narrow surfaces of each battery cell 121 are connected by structural plates 122, and the top surfaces are connected by mica tape 124. A heat insulation component 125 with aerogel is provided between the large surfaces of the battery cells 121. The heat insulation component 125, the bottom plate 112, the structural plates 122, and the heat insulation component 123 achieve an enclosure effect for the battery module 12, improve the structural stability of the battery module 12, and provide multi-faceted protection for the battery cells 121 inside the battery module 12, reducing the risk of heat spread of the battery cells 121.

[0076] An embodiment of this utility model also provides a vehicle including the battery pack of any of the above embodiments.

[0077] With this configuration, the vehicle provided in this embodiment can reduce the likelihood of electrolyte ejected from the battery cells 121 entering the gaps between battery modules 12 or spreading to other battery modules 12 when thermal runaway occurs, thus mitigating the degree of thermal runaway. The derivation process of this beneficial effect is largely similar to the derivation process of the beneficial effects brought by the battery pack described above, and will not be repeated here.

[0078] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery pack, characterized in that, include: Box (11); A battery module (12) is disposed inside the housing (11). The battery module (12) includes a plurality of battery cells (121) arranged sequentially along a second direction. Each battery cell (121) has an explosion-proof valve (1211) at one end along a third direction. The battery module (12) has a structural piece (122) on at least one side along the first direction, the battery cell (121) is connected to the structural piece (122) along the side of the first direction, and the structural piece (122) is higher than the end face of the explosion-proof valve (1211) along the third direction.

2. The battery pack according to claim 1, characterized in that, The battery module (12) is configured as a plurality of units, and the plurality of battery modules (12) are arranged in the housing (11) along the first direction.

3. The battery pack according to claim 1 or 2, characterized in that, The battery module (12) has structural pieces (122) on both sides along the first direction, and the battery cell (121) is connected to the structural pieces (122) on both sides along the first direction.

4. The battery pack according to claim 3, characterized in that, The structural piece (122) is connected to the inner wall of the box (11); And / or, the inner wall of the box (11) is provided with a reinforcing beam (114), and the structural piece (122) is connected to the reinforcing beam (114).

5. The battery pack according to claim 1 or 2, characterized in that, The cross-sectional shape of the structural piece (122) is "I" or "L" shaped, and the bottom surface of the battery cell (121) partially overlaps the bottom (1222) of the structural piece (122).

6. The battery pack according to claim 5, characterized in that, The bottom surface of the battery cell (121) is not attached to the bottom (1222) of the structural piece (122), but is bonded to the bottom plate (112) of the housing (11).

7. The battery pack according to claim 1, characterized in that, The structural piece (122) includes a plurality of sub-structural pieces (1223), and the battery cell (121) is connected to each of the sub-structural pieces (1223) along the side of the first direction.

8. The battery pack according to claim 1, characterized in that, The structural piece (122) is a solid structure; Alternatively, the structural piece (122) may have a cavity inside, and the cavity may contain a heat-absorbing phase change material.

9. The battery pack according to claim 1, characterized in that, The battery module (12) is provided with a flap assembly (123) at one end along the third direction, and the battery cell (121) of the battery module (12) is electrically connected through the flap assembly (123); The structural piece (122) has clearance openings (1221) at both ends along the second direction, and the clearance openings (1221) are used to avoid the diaphragm assembly (123).

10. The battery pack according to claim 1, characterized in that, A heat insulation component (125) is provided between adjacent battery cells (121); The heat insulation component (125) includes a frame (1251) and an elastic heat insulation element (1252), wherein the elastic heat insulation element (1252) is disposed within the frame (1251).

11. A vehicle, characterized in that, Includes the battery pack as described in any one of claims 1-10.

Images