Battery box body, system, power utilization device and battery box body expansion method

Abstract

The invention relates to a battery box body, a battery system, a power utilization device and a battery box body expansion method, the battery box body comprises a frame assembly (1) comprising a first frame (11) and a second frame (12) which are oppositely arranged along a first direction (X), and a third frame (13) and a fourth frame (14) which are oppositely arranged along a second direction (Y); the heat exchange plate (2) is vertically connected with the frame assembly (1), and an accommodating space is formed by the heat exchange plate (2) and the frame assembly (1); the battery module (3) is arranged in the accommodating space; the first frame (11), the second frame (12), the third frame (13), the fourth frame (14) and the heat exchange plate (2) are formed through extrusion. The first direction (X) is perpendicular to the second direction (Y).

Description

Technical Field

[0001] The present disclosure relates to the field of power batteries, and in particular to a battery box, a battery system, an electrical device, and a battery box expansion method. Background Art

[0002] With the promotion of electrification in the field of commercial vehicles and construction machinery, battery adaptation has always been a problem that plagues the promotion of electrification. However, due to the large number of commercial vehicles and construction machinery models and complex customer needs, it is difficult to meet the needs of all models through one or several standard solutions.

[0003] Especially in the field of construction machinery, products are characterized by small batches and multiple varieties. Each generation of products needs to adjust the battery solution according to the needs of different customers and the structure of the vehicle body. This kind of tedious work raises the threshold of product development and increases the difficulty of promoting the electrification of related products.

[0004] The standard box solution in the relevant technology is developed for mainstream products on the market, emphasizing versatility rather than exclusivity. It is often more in line with the needs of some high-selling products and is difficult to be compatible with so many car models. Summary of the invention

[0005] In view of this, the embodiments of the present disclosure provide a battery box, a battery system, an electrical device and a battery box expansion method, which can improve the adaptability.

[0006] In one aspect of the present disclosure, a battery box is provided, comprising:

[0007] A frame assembly, comprising a first frame and a second frame arranged opposite to each other along a first direction, and a third frame and a fourth frame arranged opposite to each other along a second direction;

[0008] A heat exchange plate is vertically connected to the frame assembly and forms a receiving space together with the frame assembly; and

[0009] A battery module is arranged in the accommodation space;

[0010] Wherein, the first frame, the second frame, the third frame, the fourth frame and the heat exchange plate are formed by extrusion;

[0011] The first direction is perpendicular to the second direction.

[0012] In some embodiments, the battery case further comprises:

[0013] A first beam extending along a first direction and connected to the third frame and the fourth frame respectively;

[0014] A second beam extending along a second direction and disposed between the first frame and the second frame;

[0015] The first beam and the second beam are formed by extrusion.

[0016] In some embodiments, the first beam is spaced apart from the heat exchange plate along the third direction;

[0017] The third direction is perpendicular to the first direction and the second direction.

[0018] In some embodiments, the number of heat exchange plates is equal to the number of battery modules.

[0019] In some embodiments, the battery case further comprises:

[0020] an end plate assembly connected to the heat exchange plate, comprising a first end plate and a second end plate spaced apart along the second direction;

[0021] The battery module is arranged between the first end plate and the second end plate along the second direction, and the number of the end plate assemblies is equal to the number of the battery modules.

[0022] In some embodiments, the first frame, the second frame, the third frame, the fourth frame, the heat exchange plate, the first beam and / or the second beam are formed by aluminum extrusion.

[0023] In another aspect of the present disclosure, there is provided a battery system, comprising:

[0024] A battery box as in any of the above embodiments.

[0025] In another aspect of the present disclosure, there is provided an electric device, comprising:

[0026] As the battery system described above.

[0027] In another aspect of the present disclosure, a battery box expansion method based on any one of the above embodiments is provided, comprising:

[0028] Adjust the profile length of the frame assembly and heat exchange plate according to the size of the battery module.

[0029] In some embodiments, the battery box expansion method further includes:

[0030] According to the number of battery modules, adjust the profile length of the frame assembly and the heat exchange plate, as well as the number of heat exchange plates.

[0031] Therefore, according to the embodiment of the present disclosure, the first frame, the second frame, the third frame, the fourth frame and the heat exchange plate are made of profiles, which can adapt to the assembly requirements of different sizes and numbers of cells and modules without changing the profile mold and fully or partially using the processing tooling, thereby improving the adaptability of the battery box. Under the premise of using the same set of molds, the development requirements of several or even dozens of battery packs can be met, thereby improving the utilization rate of the profile extrusion mold and reducing the development cost of serialized products. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0033] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0034] Figure 1 is a schematic structural diagram of some embodiments of a battery box according to the present disclosure;

[0035] Figure 2 is a partial structural schematic diagram of some embodiments of the battery box according to the present disclosure;

[0036] Figure 3 is a schematic diagram of the structural decomposition of some embodiments of the battery box according to the present disclosure;

[0037] Figure 4 is a schematic structural diagram of a heat exchange plate according to some embodiments of a battery box disclosed herein;

[0038] Figure 5 is a cross-sectional view of a heat exchange plate according to some embodiments of the battery case of the present disclosure;

[0039] Fig. 6A is a schematic structural diagram of a frame assembly according to some embodiments of a battery box of the present disclosure;

[0040] Figure 6B is a cross-sectional view of a frame assembly according to some embodiments of the battery box of the present disclosure;

[0041] Fig. 7A is a schematic structural diagram of a frame assembly according to other embodiments of a battery box of the present disclosure;

[0042] Figure 7B is a cross-sectional view of a frame assembly according to some embodiments of the battery box of the present disclosure;

[0043] Fig. 8A is a top view of some embodiments of a battery case according to the present disclosure;

[0044] Figure 8B is a top view of some embodiments of a battery case according to the present disclosure;

[0045] Figure 8C is a top view of some embodiments of a battery case according to the present disclosure;

[0046] Fig.8D is a top view of some embodiments of a battery case according to the present disclosure;

[0047] Fig. 9 It is a flow chart of some embodiments of the battery box expansion method according to the present disclosure.

[0048] In the figure:

[0049] 1. Frame assembly; 11. First frame; 12. Second frame; 13. Third frame; 14. Fourth frame; 2. Heat exchange plate; 21. Water inlet; 22. Water outlet; 23. Front plug; 24. Rear plug; 3. Battery module; 41. First beam; 42. Second beam; 421. Longitudinal beam; 422. Reinforcement beam; 5. End plate assembly; 51. First end plate; 52. Second end plate.

[0050] It should be understood that the size of each part shown in the accompanying drawings is not drawn according to the actual proportional relationship. In addition, the same or similar reference numerals represent the same or similar components. DETAILED DESCRIPTION

[0051] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0052] The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0053] In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other device without an intermediate device, or may not be directly connected to the other device but have an intermediate device.

[0054] All terms (including technical terms or scientific terms) used in the present disclosure have the same meanings as those understood by ordinary technicians in the field to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0055] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0056] The standard box in the relevant technology will lead to insufficient space utilization in smaller models, resulting in poor endurance performance of the product on the client side and failing to fully meet customer needs. In addition, due to rapid technological breakthroughs in the industry and the gradual increase in the penetration rate of electrification, in the process of remodeling some models, how to arrange the appropriate battery solution has always been a problem that troubles developers.

[0057] The standard box solution in the relevant technology is difficult to be compatible with so many models, and the new development not only prolongs the R&D cycle, but also increases the development cost of the battery. Among the structural parts of the battery, the box accounts for a large proportion. At the same time, in the mass production plan, in order to ensure the consistency and reliability of the product, it is also necessary to equip with reliable quality molds and tooling. The cost of molds and tooling is often millions, and it is difficult to recover the cost when faced with small batches of multiple types of products.

[0058] In view of this, in one aspect of an embodiment of the present disclosure, a battery box is provided to improve adaptability.

[0059] Figure 1 is a schematic structural diagram of some embodiments of the battery box according to the present disclosure, Figure 2 is a partial structural schematic diagram of some embodiments of the battery box according to the present disclosure, Figure 3 is a schematic diagram of the structure of some embodiments of the battery box according to the present disclosure, referring to Figure 1~Figure 3 The battery box includes: a frame assembly 1, a heat exchange plate 2 and a battery module 3.

[0060] The frame assembly 1 includes a first frame 11 and a second frame 12 arranged opposite to each other along a first direction X, and a third frame 13 and a fourth frame 14 arranged opposite to each other along a second direction Y. The heat exchange plate 2 is vertically connected to the frame assembly 1 and forms a receiving space together with the frame assembly 1 .

[0061] The battery module 3 is arranged in the accommodation space, and the battery module 3 includes but is not limited to a blade module, and a low-voltage collection module is assembled at the end. The first frame 11, the second frame 12, the third frame 13, the fourth frame 14 and the heat exchange plate 2 are formed by extrusion, which can maintain the profile section unchanged and allow the profile length to change as required. The first direction X is perpendicular to the second direction Y.

[0062] The first frame 11, the second frame 12, the third frame 13, and the fourth frame 14 can be connected by arc welding, and the first frame 11 can be used to install high-pressure and low-pressure plug-ins. The heat exchange plate 2 is an extruded profile structure, including but not limited to a liquid cooling plate, and the flow uniformity is controlled by the size of the cavity.

[0063] In this embodiment, the first frame 11, the second frame 12, the third frame 13, the fourth frame 14 and the heat exchange plate 2 are made of profiles, which can adapt to the assembly requirements of battery cells and modules of different sizes and quantities without changing the profile mold and fully or partially reusing the processing tooling, thereby improving the adaptability of the battery box.

[0064] On the premise of using the same set of molds, it can meet the development needs of several or even dozens of battery packs, improve the utilization rate of profile extrusion molds, and greatly reduce the development cost of series products.

[0065] Figure 4 is a schematic diagram of the structure of the heat exchange plate according to some embodiments of the battery box of the present disclosure, Figure 5 is a cross-sectional view of a heat exchange plate according to some embodiments of the battery case of the present disclosure, with reference to Figure 4 and Figure 5 The heat exchange plate 2 uses the side milling method to process the length of the isolation ribs in the flow channel to control the flow distribution during the flow process. The heat exchange plate 2 includes a front plug 23, a rear plug 24, a water inlet nozzle 21 and a water outlet nozzle 22. The front plug 23 and the rear plug 24 are connected to the heat exchange plate 2 by stir friction welding, so that each heat exchange plate 2 can achieve independent sealing.

[0066] refer to Figure 1~Figure 3 In some embodiments, the battery box further includes: a first beam 41 and a second beam 42 .

[0067] The first beam 41 extends along the first direction X and is respectively connected to the third frame 13 and the fourth frame 14. The second beam 42 extends along the second direction Y and is disposed between the first frame 11 and the second frame 12. The first beam 41 and the second beam 42 are formed by extrusion.

[0068] The first beam 41 and the second beam 42 are reinforcing beams to strengthen the structural strength of the battery box. The second beam 42 may include a longitudinal beam 421 and a reinforcing beam 422, the longitudinal beam 421 is lower than the reinforcing beam 422 along the third direction, the reinforcing beam 422 is arranged on a side close to the second frame 12, and the longitudinal beam 421 and the reinforcing beam 422 are connected by arc welding.

[0069] In this embodiment, the first beam 41 and the second beam 42 are made of profiles, which can be adjusted to suitable sizes according to the assembly requirements of battery cells and modules of different sizes and numbers, and can meet diverse product requirements.

[0070] In some embodiments, the first beam 41 is spaced apart from the heat exchange plate 2 along the third direction Z. The third direction Z is perpendicular to the first direction X and the second direction Y.

[0071] In this embodiment, the first beam 41 is raised to facilitate assembly of the first beam 41 .

[0072] refer to Figure 1~Figure 3 In some embodiments, the number of heat exchange plates 2 is equal to the number of battery modules 3. In this embodiment, the number of heat exchange plates 2 corresponds to the number of battery modules 3. When the number of battery modules 3 needs to be adjusted, the number of heat exchange plates 2 is adjusted accordingly, which can meet the diverse battery pack development needs.

[0073] refer to Figure 1~Figure 3 In some embodiments, the battery box further includes an end plate assembly 5, which is connected to the heat exchange plate 2 and includes a first end plate 51 and a second end plate 52 spaced apart along the second direction Y. The battery module 3 is disposed between the first end plate 51 and the second end plate 52 along the second direction Y, and the number of the end plate assemblies 5 is equal to the number of the battery modules 3.

[0074] The end plate assembly 5 is configured to suppress expansion of the battery module 3, and each end plate assembly 5 has two end plates. The first end plate 51 and the second end plate 52 are connected to the first beam 41 and the second frame 12 by bolt locking.

[0075] In this embodiment, the number of end plate assemblies 5 matches the number of battery modules 3, and each end plate assembly 5 is independently arranged to facilitate adaptive adjustment as the number of battery modules 3 increases or decreases, thereby reducing R&D and manufacturing costs and meeting diverse needs.

[0076] In some embodiments, the first frame 11, the second frame 12, the third frame 13, the fourth frame 14, the heat exchange plate 2, the first beam 41 and / or the second beam 42 are formed by aluminum extrusion. In this embodiment, the first frame 11, the second frame 12, the third frame 13, the fourth frame 14, the heat exchange plate 2, the first beam 41 and / or the second beam 42 are formed by aluminum extrusion, which helps to achieve lightweight.

[0077] refer to Figure 1~Figure 5 , the following are some examples of the connection sequence and method between the components of the battery box:

[0078] 1) The first frame 11, the second frame 12, the third frame 13, and the fourth frame 14 are connected by arc welding;

[0079] 2) The heat exchange plate 2 and the longitudinal beam 421 are connected by friction stir welding;

[0080] 3) The frame assembly is connected to the processed heat exchange plate 2 by friction stir welding;

[0081] 4) The reinforcing beam 422, the longitudinal beam 421 and the second frame 12 are connected by arc welding;

[0082] 5) The first beam 41 is connected to the heat exchange plate 2 and the third frame 13 and the fourth frame 14 by arc welding;

[0083] 6) The end plate assembly 5 is finally assembled by bolt locking.

[0084] Fig. 6A 6B is a schematic diagram of the structure of the frame assembly of some embodiments of the battery box according to the present disclosure, and 6C is a cross-sectional view of the frame assembly of some embodiments of the battery box according to the present disclosure. Fig. 7A is a schematic structural diagram of a frame assembly according to other embodiments of a battery box of the present disclosure, Figure 7B is a cross-sectional view of a frame assembly according to some embodiments of the battery box of the present disclosure, with reference to Figure 6A to Figure 7B The battery box has a variety of assembly methods to meet the differences in assembly of different vehicles.

[0085] Fig. 6A , Figure 6B It is an assembly structure based on wire thread inserts. Fig. 7A , Figure 7B It is an assembly structure based on welding screw sleeves. Fig. 6A , Figure 6B The bottom frame is partially thickened to provide a mounting hole for the vehicle. Since the screw sleeves that meet the fastening requirements have length requirements, the weight of the box is not greatly affected by the local thickening method, and the processing of the box is relatively simple. When the vehicle can provide mounting holes, the locally thickened area and screw sleeves can be eliminated, and only the through holes can be processed. The solution of partially thickening the bottom frame can be applied to some battery packs with smaller sizes and lower power.

[0086] When the power is large, you can use Fig. 7A , Figure 7BThe welding screw sleeve method shown in the demonstration increases the size of the matching bolt by welding a larger screw sleeve. This method has little effect on the weight of the box and can also reduce the assembly difficulty of the whole vehicle. It can be applied to larger battery packs and whole vehicle products with more complex working conditions.

[0087] Fig. 8A is a top view of some embodiments of the battery case according to the present disclosure, Figure 8B is a top view of some embodiments of the battery case according to the present disclosure, Figure 8C is a top view of some embodiments of the battery case according to the present disclosure, Fig.8D is a top view of some embodiments of the battery box according to the present disclosure, referring to Figure 8A to Figure 8D , the following are some battery box expansion methods in some embodiments:

[0088] refer to Fig. 8A Different types of cells can be accommodated in the same battery box. The cells are developed in series, and the thickness of cells of different types along the second direction Y is different, and the length along the first direction X and the width along the third direction Z are the same. Fig. 8A The two battery modules 3 are blade batteries developed in series.

[0089] The distance between the second frame 12 and the first beam 41 meets the preset distance, that is, u=N1t1+(N1-1)d+K1=N2t2+(N2-1)d+K2, where u is the distance between the second frame 12 and the first beam 41, N1 and N2 are the numbers of battery cells in the two battery modules 3 respectively, t1 and t2 are the thicknesses of the battery cells in the two battery modules 3, d is the distance between the battery cells, and K1 and K2 are the gaps between the battery module 3 and the box body.

[0090] On the premise that the structure and spacing u of the battery case remain unchanged, the number of battery cells that can be accommodated is similar and the energy density of the battery cells is close. Under the battery case expansion plan that allows for the accommodation of different types of battery cells, the power of a single battery pack is similar, which can play a role in adjusting the voltage platform.

[0091] When the frame assembly structure of the battery box remains unchanged, by adjusting the position of the first beam 41 in the second direction Y and the length of the second beam 42 along the second direction Y, the battery box can also adapt to a shorter battery module 3, where the length of the battery module 3 refers to the dimension along the second direction Y.

[0092] The first beam 41 is connected to the heat exchange plate 2 and the third frame 13 and the fourth frame 14 by arc welding, and its position can be changed. Therefore, under the premise that the frame assembly 1 of the box body remains unchanged, the length of the battery module 3 can be adjusted to increase the power to a certain extent. Only the processing tooling of the first beam 41 and the second beam 42 needs to be adjusted, and the other structures of the box body can be used.

[0093] refer to Figure 8B and Figure 8C The cross-section of the profile used for the battery box remains unchanged, but it can adapt to different numbers of battery modules 3, which can achieve a significant expansion of power and effectively increase or reduce power.

[0094] Figure 8B What is shown is a solution for reducing the number of modules. The first beam 41 and the second beam 42 are eliminated. The number of heat exchange plates 2 and end plate assemblies 5 decreases as the number of battery modules 3 decreases. The length of the second frame 12 and the first frame 11 along the first direction X is shortened accordingly, and other components and assembly methods remain unchanged.

[0095] Figure 8C What is shown is a solution for increasing the number of modules. A plurality of first beams 41 and second beams 42 are provided. The number of heat exchange plates 2 and end plate assemblies 5 increases as the number of battery modules 3 increases. The lengths of the second frame 12 and the first frame 11 are extended accordingly, while other components and assembly methods remain unchanged.

[0096] refer to Fig.8D The cross section of the profile used for the battery box remains unchanged, but it can adapt to battery modules 3 of different lengths. The length of the battery module 3 refers to the dimension along the second direction Y. The lengths of the third frame 13 and the fourth frame 14 are extended, and the lengths of the first beam 41, the second beam 42 and the heat exchange plate 2 are also extended accordingly, while other components and assembly methods remain unchanged. By extending the battery box, the upper limit of the power can be increased.

[0097] The above four expansion methods based on the battery box are all based on the premise that the extrusion die does not need to be adjusted. The cost of tooling modification is evaluated according to the adjustment range of the overall size, which greatly reduces the cost of box modification.

[0098] The above four solutions can also be combined with each other. For example, by increasing the extrusion of the battery module 3 and adjusting the spacing between the cells to change the type of cells in the battery module 3, the power can be increased without making a significant change to the voltage platform.

[0099] For another example, by reducing the number of battery modules 3 and changing to a single module, and then lengthening the battery box along the second direction Y, the size can be adjusted to fit under the premise of a small change in power.

[0100] In another aspect of the embodiments of the present disclosure, a battery system is provided, including a battery box as described in any of the above embodiments. In this embodiment, the battery box includes but is not limited to being assembled in layers by stacking.

[0101] In another aspect of the disclosed embodiment, an electric device is provided, comprising the battery system as described above. The electric device includes but is not limited to engineering machinery such as a loader. In this embodiment, the battery system can meet the diverse power consumption and size requirements of the electric device, and has high adaptability and low cost.

[0102] Fig. 9 is a flowchart of some embodiments of the battery box expansion method disclosed in the present invention, referring to Figure 1 to Figure 9 In another aspect of the embodiments of the present disclosure, a battery box expansion method based on any of the above embodiments is provided, the battery box expansion method comprising: step S1. In step S1, the profile lengths of the frame assembly 1 and the heat exchange plate 2 are adjusted according to the size of the battery module 3.

[0103] refer to Fig.8D The cross section of the profile used for the battery box remains unchanged, but it can adapt to battery modules 3 of different lengths. The length of the battery module 3 refers to the dimension along the second direction Y. The lengths of the third frame 13 and the fourth frame 14 are extended, and the lengths of the first beam 41, the second beam 42 and the heat exchange plate 2 are also extended accordingly, while other components and assembly methods remain unchanged. By extending the battery box, the upper limit of the power can be increased.

[0104] In addition, when the frame assembly structure of the battery box remains unchanged, by adjusting the position of the first beam 41 in the second direction Y and the length of the second beam 42 along the second direction Y, the battery box can also adapt to a battery module 3 with a shorter length.

[0105] The first beam 41 is connected to the heat exchange plate 2 and the third frame 13 and the fourth frame 14 by arc welding, and its position can be changed. Therefore, under the premise that the frame assembly 1 of the box body remains unchanged, the length of the battery module 3 can be adjusted to increase the power to a certain extent. Only the processing tooling of the first beam 41 and the second beam 42 needs to be adjusted, and the other structures of the box body can be used.

[0106] In this embodiment, by adjusting the length of the battery box profile, it is possible to adapt to electrical devices with different power requirements and installation requirements at a lower cost and lower assembly difficulty to meet diverse power requirements. Fewer molds and tooling can be used to develop battery packs of more sizes and power, effectively reducing the development cost and development cycle of the battery pack.

[0107] refer to Figure 1 to Figure 9In some embodiments, the battery box expansion method further includes: step S2. In step S2, the profile lengths of the frame assembly 1 and the heat exchange plate 2, as well as the number of the heat exchange plates 2, are adjusted according to the number of the battery modules 3.

[0108] refer to Figure 8B and Figure 8C The cross-section of the profile used for the battery box remains unchanged, but it can adapt to different numbers of battery modules 3, which can achieve a significant expansion of power and effectively increase or reduce power.

[0109] Figure 8B What is shown is a solution for reducing the number of modules. The first beam 41 and the second beam 42 are eliminated. The number of heat exchange plates 2 and end plate assemblies 5 decreases as the number of battery modules 3 decreases. The length of the second frame 12 and the first frame 11 along the first direction X is shortened accordingly, and other components and assembly methods remain unchanged.

[0110] Figure 8C What is shown is a solution for increasing the number of modules. A plurality of first beams 41 and second beams 42 are provided. The number of heat exchange plates 2 and end plate assemblies 5 increases as the number of battery modules 3 increases. The lengths of the second frame 12 and the first frame 11 are extended accordingly, while other components and assembly methods remain unchanged.

[0111] In this embodiment, by adjusting the length and quantity of the battery box profile, different numbers of battery modules 3 can be adapted, which has good expansion performance and can meet the power demand of personalized products at a lower cost. Under the premise of using the same set of molds, the development needs of several or even dozens of battery packs can be met, the utilization rate of the profile extrusion mold is improved, and the development cost of serialized products is greatly reduced.

[0112] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0113] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A battery box, characterized in that: include: A frame assembly (1), comprising a first frame (11) and a second frame (12) arranged opposite to each other along a first direction (X), and a third frame (13) and a fourth frame (14) arranged opposite to each other along a second direction (Y); A heat exchange plate (2) vertically connected to the frame assembly (1) and forming a receiving space together with the frame assembly (1); and A battery module (3) is arranged in the accommodation space; Wherein, the first frame (11), the second frame (12), the third frame (13), the fourth frame (14) and the heat exchange plate (2) are formed by extrusion; The first direction (X) is perpendicular to the second direction (Y).

2. The battery box according to claim 1, characterized in that: Also includes: A first beam (41) extending along the first direction (X) and connected to the third frame (13) and the fourth frame (14) respectively; A second beam (42), extending along the second direction (Y), and arranged between the first frame (11) and the second frame (12); Wherein, the first beam (41) and the second beam (42) are formed by extrusion.

3. The battery case according to claim 2, characterized in that: The first beam (41) is arranged spaced apart from the heat exchange plate (2) along the third direction (Z); Wherein, the third direction (Z) is perpendicular to the first direction (X) and the second direction (Y).

4. The battery case according to claim 1, characterized in that: The number of the heat exchange plates (2) is equal to the number of the battery modules (3).

5. The battery case according to any one of claims 1 to 4, characterized in that: Also includes: an end plate assembly (5), connected to the heat exchange plate (2), comprising a first end plate (51) and a second end plate (52) arranged at intervals along the second direction (Y); The battery module (3) is arranged between the first end plate (51) and the second end plate (52) along the second direction (Y), and the number of the end plate assemblies (5) is equal to the number of the battery modules (3).

6. The battery case according to claim 2, characterized in that: The first frame (11), the second frame (12), the third frame (13), the fourth frame (14), the heat exchange plate (2), the first beam (41) and / or the second beam (42) are formed by aluminum extrusion.

7. A battery system, characterized in that: include: A battery case as claimed in any one of claims 1 to 6.

8. An electrical device, characterized in that: include: The battery system as claimed in claim 7.

9. A battery box expansion method based on the battery box according to any one of claims 1 to 6, characterized in that: include: The profile lengths of the frame assembly (1) and the heat exchange plate (2) are adjusted according to the size of the battery module (3).

10. The battery box expansion method according to claim 9, characterized in that: Also includes: According to the number of the battery modules (3), the profile lengths of the frame assembly (1) and the heat exchange plates (2), as well as the number of the heat exchange plates (2) are adjusted.

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