Modularization-free battery pack integration device

Abstract

The utility model discloses a modularization-free battery pack integration device, which comprises a battery pack box body, a battery cell accommodating cavity is arranged in the battery pack box body, and a battery cell mounting space is reserved on one side, close to the battery pack box body, of the battery cell accommodating cavity; the expansion part is arranged in the battery cell mounting space so as to expand when being separated from a vacuum environment; and the anti-expansion end plate is arranged at the end part of the battery pack box body so as to prevent expansion in the battery cell accommodating cavity. By utilizing the non-modular battery pack integration device disclosed by the utility model, the space utilization rate can be improved, the production efficiency can be improved, the cost can be reduced, the installation difficulty and the welding and size requirements on the box body can be effectively reduced, and the process equipment requirements of the battery pack in production and manufacturing can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium batteries, and in particular relates to a non-modular battery pack integration device. Background Art

[0002] When integrating battery cells into battery packs, the main solution currently used is to integrate the battery cells into battery cell modules, and then integrate the battery cell modules into the battery packs. However, this battery pack integration solution has low space utilization, low production efficiency and high cost.

[0003] There is also a solution to integrate the battery cells directly into the battery pack. This solution mainly fixes the battery cells with structural adhesive and installs thick end plates at both ends of the battery pack formed by the battery cells to prevent the battery cells from expanding. However, this battery pack integration solution has high requirements for process equipment in production and manufacturing, and also has high requirements for the welding and size of the box.

[0004] In summary, the art urgently needs a battery pack integration solution that can overcome the above-mentioned shortcomings. Utility Model Content

[0005] The utility model provides a non-modular battery pack integration device, which is used to solve the problems existing in the battery pack integration solution in the prior art.

[0006] In order to solve the above technical problems, the utility model provides a non-modular battery pack integration device, comprising:

[0007] A battery pack case, wherein the battery pack case has a cell accommodating cavity inside, and a cell installation space is reserved on a side of the cell accommodating cavity close to the battery pack case;

[0008] An expansion member, the expansion member is arranged in the battery cell installation space so as to expand when leaving the vacuum environment;

[0009] An anti-expansion end plate is arranged at the end of the battery pack body to prevent expansion in the battery cell accommodating cavity.

[0010] Optionally, the expansion member is a vacuum heat shrinkable foam.

[0011] Optionally, the battery pack case is square.

[0012] Optionally, the non-modular battery pack integrated device further includes a first insulating film, which is disposed around the battery cell accommodating cavity, and the expansion member is located between the first insulating film and the battery pack case.

[0013] Optionally, the non-modular battery pack integration device further includes structural adhesive, which is disposed on the bottom plate of the battery pack case, and the structural adhesive is located on a side of the bottom plate close to the battery cell accommodating cavity.

[0014] Optionally, the non-modular battery pack integration device also includes a second insulating film, which is arranged on the bottom plate of the battery pack case, and the second insulating film and the structural adhesive are located on the same side of the bottom plate, and the second insulating film and the structural adhesive are located in different areas on the bottom plate.

[0015] Optionally, the extrusion force generated by the expansion of the expansion member is 3000 Newtons.

[0016] Optionally, the top cover of the battery pack box has a first cover plate and a second cover plate, and the first cover plate is detachably connected to the second cover plate;

[0017] The battery pack integrated device also includes a buckle, which is overlapped between the first cover plate and the second cover plate, and the buckle is detachably connected to the first cover plate and fixedly connected to the second cover plate.

[0018] Optionally, the non-modularized battery pack integration device further includes a high-voltage device module, which is disposed on one side of the battery cell accommodating space close to the top cover, and includes a battery management system, a relay, and a fuse.

[0019] Optionally, the non-modular battery pack integration device further includes an external interface connector module, which is disposed on the battery pack case, and includes an external power connector and an external communication connector.

[0020] Compared with the prior art, the non-module battery pack integration device provided by the utility model has the following beneficial effects:

[0021] The battery cells can be placed directly in the battery pack box of the utility model. Since the expansion piece can expand when it leaves the vacuum environment, when the expansion piece is set in the battery cell installation space, the expansion piece will expand under normal atmospheric pressure conditions to squeeze the battery cells, so that there is a squeezing force between adjacent battery cells, which meets the requirements of grouping multiple battery cells to form a battery pack. In this way, the battery cells can be directly integrated into the battery pack, thereby avoiding the disadvantages of the battery pack integration solution of first integrating the battery cells into the battery cell module and then integrating the battery cell module into the battery pack; and when the battery cells are directly integrated into the battery pack of the utility model, it is only necessary to install the battery cells and the expansion piece into the battery pack box, and since the battery cell installation space is reserved, it is possible to effectively reduce the installation difficulty and the welding and size requirements of the box (under normal circumstances, the box welding requirements and size requirements need to make the shape and volume of the box match the battery cells in the box), reduce the process equipment requirements of the battery pack in the production and manufacturing, as well as the welding and size requirements of the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only part of the embodiments of the utility model, rather than all of the embodiments. For ordinary technicians in this field, without paying creative work, other drawings obtained based on these drawings all fall within the scope of protection of the utility model.

[0023] Figure 1 It is an exploded diagram of a non-modular battery pack integration device provided by an embodiment of the utility model;

[0024] Figure 2 This is another exploded view of a non-modular battery pack integration device provided by an embodiment of the utility model;

[0025] Figure 3 It is a three-dimensional structural diagram of a non-modular battery pack integration device provided by an embodiment of the utility model in a certain direction;

[0026] Figure 4 It is a three-dimensional structural diagram of a non-modular battery pack integration device provided by an embodiment of the utility model in another direction;

[0027] Figure 5 It is a three-dimensional structural diagram of a non-modular battery pack integration device provided by an embodiment of the utility model in another direction.

[0028] Explanation of the accompanying drawings: 100 - battery pack body, 110 - battery accommodating cavity, 120 - bottom plate, 130 - top cover, 131 - first cover plate, 132 - second cover plate, 133 - buckle, 200 - expansion piece, 300 - anti-expansion end plate, 400 - battery cell, 500 - first insulating film, 600 - second insulating film, 700 - high-voltage device module, 800 - external interface connector module, 900 - busbar module. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] In order to make the description of the disclosed content more detailed and complete, the following is an illustrative description of the implementation methods and specific examples of the utility model; however, this is not the only form of implementing or using the specific examples of the utility model. Based on the examples in the utility model, all other examples obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein.

[0032] In the description of the embodiments of the present invention, "multiple" means two or more than two, and other quantifiers are similar and should be understood. The preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In addition, the embodiments of the present invention and the features therein may be combined with each other if there is no conflict.

[0033] like Figure 1 and Figure 2Shown are two exploded views of a non-modular battery pack integrated device provided by an embodiment of the utility model, the integrated device comprising: a battery pack case 100, wherein the battery pack case 100 has a battery cell accommodating cavity 110 inside, and a battery cell installation space is reserved on a side of the battery pack case 100 close to the battery pack case 100; an expansion member 200, wherein the expansion member 200 is arranged in the battery cell installation space to expand when leaving the vacuum environment; and an anti-expansion end plate 300, wherein the anti-expansion end plate 300 is arranged at the end of the battery pack case 100 to prevent expansion in the battery cell accommodating cavity 110.

[0034] It should be noted that the battery pack case 100 can be any box structure that can accommodate the battery cell 400, and the volume of the battery pack case 100 can be determined according to the volume of the accommodated battery cell 400. For example, the height and width of the battery pack case 100 can be greater than the height and width of the battery cell 400.

[0035] It should be noted that the volume of the cell installation space reserved in the cell accommodating cavity 110 can be set according to specific needs during application. For example, the volume of the cell installation space can be a volume that allows the battery cell 400 to be easily installed into the battery cell accommodating cavity 110. The volume of the cell installation space can also be the same as the volume of the expansion piece 200 after expansion, so that after the expansion piece 200 expands, each battery cell 400 in the battery accommodating cavity 110 can be tightened, so that multiple battery cells 400 form a battery pack.

[0036] It should be noted that the expansion member 200 can be any structural member that can be compressed when in a vacuum and expand when the vacuum is released. For example, the expansion member 200 can be a hollow bag provided with a valve. When the valve is closed, the internal pressure of the expansion member 200 is relatively high and is in a vacuum state, and the expansion member 200 is compressed as a whole. When the valve is opened, air enters the expansion member 200, so that the vacuum state inside the expansion member 200 is released and the expansion member 200 expands. It can be understood that in order to maintain the vacuum state inside the expansion member 200, the material of the hollow bag needs to be dense.

[0037] It should be noted that in order to make the anti-expansion effect of the anti-expansion end plate 300 better, the thickness of the anti-expansion end plate 300 can be made thicker. For example, the thickness of the anti-expansion end plate 300 can be made greater than a preset thickness threshold, and the thickness direction of the anti-expansion end plate 300 is the expansion direction of the battery cell 400.

[0038] The battery cell 400 can be directly placed in the battery pack box 100 of the utility model embodiment. Since the expansion member 200 can expand when leaving the vacuum environment, when the expansion member 200 is set in the battery cell installation space, the expansion member 200 will expand under normal atmospheric pressure conditions to squeeze the battery cell 400, so that there is a squeezing force between adjacent battery cells 400, which meets the grouping requirements of multiple battery cells 400 to form a battery pack. In this way, the battery cell 400 can be directly integrated into the battery pack, thereby avoiding the need to first integrate the battery cell 400 into the battery cell module and then integrate the battery cell module. The disadvantages brought by the battery pack integration solution of integrating into the battery pack; and when the utility model directly integrates the battery cell 400 into the battery pack, it is only necessary to install the battery cell 400 and the expansion piece 200 into the battery pack box 100, and because the battery cell installation space is reserved, it can effectively reduce the installation difficulty and the welding and size requirements of the box (under normal circumstances, the box welding requirements and size requirements require that the shape and volume of the box match the battery cells in the box), reduce the process equipment requirements for the battery pack in the production and manufacturing, as well as the welding and size requirements of the box.

[0039] In an optional implementation, the expansion member 200 is a vacuum heat shrinkable foam.

[0040] It should be noted that before the vacuum heat shrink foam in this implementation is installed into the battery cell installation space, the elastic foam will be evacuated and the elastic foam will be shrunk to the required size by means of heat shrink coating. After the vacuum heat shrink foam is installed into the battery cell installation space, the film on the outside of the vacuum heat shrink foam is cut to allow air to enter the vacuum heat shrink foam, causing it to expand and squeeze the battery cell 400.

[0041] It should be noted that vacuum heat shrink foam has excellent sealing properties, which can prevent gas release and atomization; it also has excellent resistance to compression deformation, that is, the elasticity is durable, which can ensure long-term shock protection of accessories; it is flame retardant, does not contain harmful and toxic substances, will not leave residue, will not pollute equipment and is non-corrosive to metal; it can also be used in a variety of temperature ranges, from minus 40 degrees Celsius to 90 degrees; its surface has excellent wettability, is easy to bond, easy to make and easy to punch.

[0042] In an optional implementation, Figures 1 to 5 As shown, the battery pack case 100 is square.

[0043] It is understandable that, since the battery cell 100 is usually square, setting the battery pack case 100 to a square shape can, on the one hand, enable the battery pack case 100 to better fix the battery cell 400, and on the other hand, can effectively suppress the expansion of the battery cell 400.

[0044] In an optional implementation, Figure 1and Figure 2 As shown, the non-modular battery pack integrated device further includes a first insulating film 500 , which is disposed around the battery cell accommodating cavity 110 , and the expansion member 200 is located between the first insulating film 500 and the battery pack case 100 .

[0045] It can be understood that the first insulating film 500 is made of insulating material.

[0046] It is understandable that providing an insulating film around the battery cell accommodating cavity 110 can prevent the electrical energy in the battery cell package from being conducted to the outside, thereby avoiding the risk of electric shock to the user.

[0047] In an optional implementation, Figure 3 The figure shows a three-dimensional structural diagram of a non-modular battery pack integration device in a certain direction provided by an embodiment of the utility model. The non-modular battery pack integration device also includes a structural adhesive (not shown in the figure), which is arranged on the bottom plate 120 of the battery pack case 100, and the structural adhesive is located on the side of the bottom plate 120 close to the battery cell accommodating cavity 110.

[0048] It is understandable that by providing structural adhesive on the bottom plate 120 of the battery pack case 100, the battery pack case 100 and the battery cell 400 can be bonded together, so that the connection between the battery pack case 100 and the battery cell 400 is more stable, and the battery pack structure formed by the battery cell 400 is more stable, thereby improving the vibration-proof properties of the battery pack structure.

[0049] In an optional implementation, Figure 1 and Figure 3 As shown, the non-modular battery pack integration device also includes a second insulating film 600, which is arranged on the bottom plate 120 of the battery pack case 100, and the second insulating film 600 and the structural adhesive are located on the same side of the bottom plate 120, and the second insulating film 600 and the structural adhesive are located in different areas on the bottom plate 120.

[0050] It is understandable that the second insulating film 600 is disposed on a side of the bottom plate 120 close to the battery cell 400 , so as to provide insulation between the battery cell 400 and the bottom plate 120 , thereby preventing the battery cell 400 from leaking electricity to the bottom plate 120 .

[0051] It is understandable that since the structural adhesive and the insulating film 600 are mixed together, the insulating property of the insulating film 600 will be affected. Therefore, the structural adhesive and the insulating film 600 are located in different areas of the base plate 120 to avoid the structural adhesive affecting the insulating property of the insulating film 600.

[0052] In an optional implementation, the extrusion force generated by the expansion of the expansion member 200 is 3000 Newtons.

[0053] It should be noted that since the extrusion pressure between the battery cells 400 when forming a battery pack is approximately 3000 Newtons, the extrusion pressure generated by the expansion of the expansion piece 200 is 3000 Newtons, which can make the pressure between the battery cells 400 meet the conditions for the battery cells 400 to be squeezed into a battery pack, thereby allowing the battery cells 400 to be integrated into the battery pack.

[0054] It should be noted that since the extrusion pressure generated by the expansion piece 200 may have error fluctuations, the extrusion pressure generated by the expansion of the expansion piece 200 may also be between the first preset threshold and the second preset threshold, wherein the first preset threshold may be greater than 3000 Newtons and the second preset threshold may be less than 3000 Newtons.

[0055] In an optional implementation, Figure 4 and Figure 5 The figure shows a three-dimensional structure diagram of a non-modular integrated device provided by the utility model in two other directions, such as Figure 2 , Figure 4 and Figure 5 As shown, the top cover 130 of the battery pack box 100 has a first cover plate 131 and a second cover plate 132, and the first cover plate 131 and the second cover plate 132 are detachably connected;

[0056] The battery pack integrated device further includes a buckle 133 , which is overlapped between the first cover plate 131 and the second cover plate 132 , and the buckle 133 is detachably connected to the first cover plate 131 and fixedly connected to the second cover plate 132 .

[0057] It can be understood that the first cover plate 131 and the second cover plate 132 are detachably connected, and the first cover plate 131 can be removed from the second cover plate 132. In this way, an opening can be provided on the top cover 130, which is convenient for technicians to repair and inspect the battery cells contained in the battery pack body 100.

[0058] It should be noted that the manner in which the first cover plate 131 and the second cover plate 132 are detachably connected can be any feasible manner. For example, since the buckle 133 is detachably connected to the first cover plate 131 and fixedly connected to the second cover plate 132, the detachable connection between the first cover plate 131 and the second cover plate 132 can be achieved through the buckle 133.

[0059] In an optional implementation, Figure 1As shown, the non-modularized battery pack integrated device also includes a high-voltage device module 700, which is arranged on one side of the battery cell accommodating space 110 close to the top cover 130, and the high-voltage device module 700 includes a battery management system, a relay and a fuse.

[0060] It can be understood that the high-voltage device module 700 can be set at the power output end of the battery cell 400 and electrically connected to the battery cell 400, and the high-voltage device module 700 includes a battery management system, a relay and a fuse, so that the battery cell 400 can be monitored and controlled and protected through the high-voltage device module 700.

[0061] In an optional implementation, a busbar module 900 is further provided between the high-voltage device module 700 and the battery cell 400 to introduce the electrical energy of the battery cell 400 into the high-voltage device module 700 .

[0062] It is understandable that since the first cover plate 131 on the top cover 130 is detachable and the high-voltage device module 700 is arranged on a side close to the top cover 130, when the first cover plate 131 is removed from the top cover 130, the operator can inspect and repair the high-voltage device module 700.

[0063] In an optional implementation, Figure 1 and Figure 5 As shown, the non-modular battery pack integration device also includes an external interface connector module 800, which is disposed on the battery pack case 100, and includes an external power connector and an external communication connector.

[0064] It should be noted that the position of the external interface connector module 800 in the battery pack case 100 can be set directly opposite the position of the high-voltage device module 700 in the battery cell accommodating cavity 110 to form a unified electrical unit, thereby supplying power to the outside world or transmitting the working status of the battery pack to the outside world.

[0065] The technical solution provided by the present invention is introduced in detail above. The principle and implementation mode of the present invention are explained by using specific examples in the present invention. The description of the above embodiments is only used to help understand the structure and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

[0066] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A non-modular battery pack integration device, characterized in that: include: A battery pack case, wherein the battery pack case has a cell accommodating cavity inside, and a cell installation space is reserved on a side of the cell accommodating cavity close to the battery pack case; An expansion member, the expansion member is arranged in the battery cell installation space so as to expand when leaving the vacuum environment; An anti-expansion end plate is arranged at the end of the battery pack body to prevent expansion in the battery cell accommodating cavity.

2. The non-modular battery pack integration device according to claim 1, characterized in that: The expansion piece is vacuum heat shrinkable foam.

3. The non-modular battery pack integration device according to claim 1, characterized in that: The battery pack box is square.

4. The non-modular battery pack integration device according to claim 1, characterized in that: It also includes a first insulating film, which is arranged around the battery cell accommodating cavity, and the expansion member is located between the first insulating film and the battery pack body.

5. The non-modular battery pack integration device according to claim 1, characterized in that: It also includes structural adhesive, which is arranged on the bottom plate of the battery pack body, and the structural adhesive is located on a side of the bottom plate close to the battery cell accommodating cavity.

6. The non-modular battery pack integration device according to claim 5, characterized in that: It also includes a second insulating film, which is arranged on the bottom plate of the battery pack body, the second insulating film and the structural adhesive are located on the same side of the bottom plate, and the second insulating film and the structural adhesive are located in different areas of the bottom plate.

7. The non-modular battery pack integration device according to claim 1, characterized in that: The extrusion force generated by the expansion of the expansion piece is 3000 Newtons.

8. The non-modular battery pack integration device according to claim 1, characterized in that: The top cover of the battery pack box has a first cover plate and a second cover plate, and the first cover plate is detachably connected to the second cover plate; The battery pack integrated device also includes a buckle, which is overlapped between the first cover plate and the second cover plate, and the buckle is detachably connected to the first cover plate and fixedly connected to the second cover plate.

9. The non-modular battery pack integration device according to claim 8, characterized in that: It also includes a high-voltage device module, which is arranged on one side of the battery cell accommodating space close to the top cover, and includes a battery management system, a relay and a fuse.

10. The non-modular battery pack integration device according to claim 9, characterized in that: It also includes an external interface connector module, which is arranged on the battery pack body and includes an external power connector and an external communication connector.

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