Battery pack of horizontal battery cell

Abstract

The utility model relates to the technical field of battery packs, and provides a battery pack of a horizontal battery cell, which comprises a battery cell module, a box body, a limiting support block and a pre-tightening pressure plate, the box body comprises an upper cover and a bottom plate, the upper cover is arranged on the bottom plate and forms an accommodating space, and the battery cell module is arranged in the accommodating space; fixing plates are arranged on the two sides of the bottom plate; each fixing plate is connected with a limiting support block, and the battery cell module is arranged between the limiting support blocks; the two ends of the pre-tightening pressing plate are connected with the limiting supporting blocks, and the pre-tightening pressing plate abuts against the top face of the battery cell module so as to apply vertically-downward pre-tightening acting force to the top face of the battery cell module. The whole battery pack is of a flat structure due to the overall arrangement of the battery cells, the space occupation of the battery pack is reduced, and the pre-tightening pressing plate can apply pre-tightening acting force to the top surfaces of the battery cell modules through the connection of the pre-tightening pressing plate, so that the battery cell modules can continuously ensure higher pre-tightening force in the working process, and the working efficiency of the battery pack is improved. Therefore, the battery has stable and high battery performance.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to a battery pack with horizontal battery cells. Background Art

[0002] A battery pack generally consists of multiple stacked battery cells and a housing for accommodating these battery cells. With the increasing market demand for performance and the need for miniaturization of the external dimensions, the industry has started to adopt horizontal battery packs for layout.

[0003] In related technologies, the pre-tightening measures for horizontal battery packs need to be improved, and the stability and reliability of pre-tightening are weak, making it difficult to efficiently exert the performance of the battery cells during use. Summary of the Utility Model

[0004] The utility model provides a battery pack with horizontal battery cells to solve the defects in the prior art that the pre-tightening force is weak and it is difficult to achieve overall miniaturization.

[0005] The utility model provides a battery pack with horizontal battery cells, including: a battery cell module, a box body, a limit support block and a pre-tightening pressure plate; the box body includes an upper cover and a bottom plate, the upper cover is arranged on the bottom plate and forms an accommodation space, and the battery cell module is horizontally arranged in the accommodation space; fixing plates are arranged on both sides of the bottom plate; the limit support blocks are connected to each fixing plate, and the battery cell module is arranged between the limit support blocks; both ends of the pre-tightening pressure plate are connected to the limit support blocks, and the pre-tightening pressure plate abuts against the top surface of the battery cell module to apply a vertically downward pre-tightening force to the top surface of the battery cell module.

[0006] According to the battery pack with horizontal battery cells provided by the utility model, a plurality of battery cell modules are arranged in the accommodation space, and the end faces of the polarity columns on adjacent battery cell modules are arranged opposite to each other.

[0007] According to the battery pack with horizontal battery cells provided by the utility model, an insulating separator is arranged between adjacent battery cell modules, and a plurality of strengthening parts are arranged on the separator, and the plurality of strengthening parts are arranged at intervals.

[0008] According to the battery pack with horizontal battery cells provided by the utility model, a connection row is arranged between adjacent battery cell modules, and the connection row is used to realize the series connection between adjacent battery cell modules.

[0009] According to the battery pack with horizontal battery cells provided by the utility model, an insulating protection plate is arranged on each surface of the battery cell module; wherein, a process hole is opened on the protection plate located on the side of the battery cell module with polarity columns.

[0010] According to the battery pack with horizontal battery cells provided by the present utility model, an opening is provided on one side of the accommodating space, and a panel is provided in the opening.

[0011] According to the battery pack with horizontal battery cells provided by the present utility model, the fixing plates are provided on both sides of the bottom plate in the first direction, baffles are provided on both sides of the bottom plate in the second direction, the upper cover is connected to the baffles, and the first direction is perpendicular to the second direction.

[0012] According to the battery pack with horizontal battery cells provided by the present utility model, the battery cell module is formed by stacking a plurality of battery cells, and connection pieces are provided between adjacent battery cells. The connection pieces are used to fix adjacent two battery cells and form a circuit.

[0013] According to the battery pack with horizontal battery cells provided by the present utility model, a connecting portion is provided on the connection piece, and the connecting portion is used to connect with a collection wire harness.

[0014] According to the battery pack with horizontal battery cells provided by the present utility model, it further includes a battery management and protection board, and the battery management and protection board is connected to the panel and is located in the opening.

[0015] For the battery pack with horizontal battery cells provided by the present utility model, the setting of the limit support blocks can realize the limit of the front and rear sides of the battery cell module. The overall arrangement of the battery cells makes the whole battery pack have a flat structure, reduces the space occupied by the battery pack, and through the connection of the pre-tightening pressing plate, the pre-tightening pressing plate can apply a pre-tightening force to the top surface of the battery cell module, so that the battery cell module can continuously maintain a high pre-tightening force during the working process, thereby enabling it to have stable and high battery performance. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is the overall structural schematic diagram of the battery pack provided by the present utility model.

[0018] Figure 2 It is the exploded structural schematic diagram of the battery pack provided by the present utility model.

[0019] Figure 3 It is the overall structural schematic diagram of the battery cell module in the battery pack provided by the present utility model.

[0020] Figure 4It is a schematic exploded view of the battery cell module in the battery pack provided by the present utility model.

[0021] Figure 5 It is a schematic exploded view of one side battery cell module in the battery pack provided by the present utility model.

[0022] Figure 6 It is a schematic view of the bottom plate in the battery pack provided by the present utility model.

[0023] Figure 7 It is a schematic view of the panel in the battery pack provided by the present utility model.

[0024] Reference numerals:

[0025] 1, box body; 11, upper cover; 12, bottom plate; 2, battery cell module; 21, connecting piece; 211, connecting part; 3, limit support block; 4, pre-tightening pressing plate; 5, panel; 51, handle; 6, battery management and protection board; 7, wiring terminal; 8, partition board; 9, protection board; 10, connecting row. Specific embodiments

[0026] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0027] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0028] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0029] In the embodiments of the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0030] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0031] In the related art, the battery cells mostly adopt a vertical structure, that is, one end of the polarity column of the battery cell faces upward. In this way, the overall layout has a relatively thick thickness and poor overall heat dissipation ability, and it is difficult to meet the current high requirements for size and performance.

[0032] Regarding the problems in the related art, such as Figure 1 、 Figure 2As shown in the figure, a battery pack of a horizontal battery cell in the present utility model includes a battery cell module 2, a box body 1, a limit support block 3, and a pre-tightening pressing plate 4; the box body 1 includes an upper cover 11 and a bottom plate 12, the upper cover 11 is arranged on the bottom plate 12, and a receiving space for installing the battery cell module 2 is formed. The battery cell module 2 is horizontally arranged in the receiving space; fixing plates are provided on both sides of the bottom plate 12; a limit support block 3 is connected to each fixing plate, and the battery cell module 2 is arranged between the limit support blocks 3; both ends of the pre-tightening pressing plate 4 are connected to the limit support blocks 3, and the pre-tightening pressing plate 4 abuts against the top surface of the battery cell module 2 to apply a vertically downward pre-tightening force to the top surface of the battery cell module 2. The battery pack needs to meet smaller dimensions and also needs to have good performance. In this embodiment, by arranging the battery cell module 2 in the receiving space and fixing both sides of the battery cell module 2 through the fixing plates, the overall structure is compact and occupies a small space. And through the action of the pre-tightening pressing plate 4, the working performance of the battery can be continuously improved.

[0033] When specifically arranged, the box body 1 is of an overall flat structure, that is, both the length and width of the box body 1 are greater than the thickness. The upper cover 11 and the bottom plate 12 are connected to form the main part of the box body 1, and a receiving space is formed inside the box body 1.

[0034] It can be understood that the battery cell will expand during use, thus affecting the service life and performance of the battery cell. In this embodiment, through the pre-tightening pressing plate 4, a force can be applied to the top surface of the battery cell, that is, the larger contact surface of the battery cell, so as to generate a pre-tightening force on the battery cell module 2, realize the pre-tightening of the battery cell module 2, improve the service life of the battery cell, and enhance the performance of the battery cell.

[0035] Such as Figure 2 、 Figure 6 As shown in the figure, the entire battery cell module 2 is located between two fixing plates. Through the fixing plates, the overall limitation of the battery cell module 2 can be realized to prevent the battery cell module 2 from shaking. Among them, the battery cell module 2 refers to an overall structure formed by stacking multiple battery cells, and the battery cells are stacked in a horizontal manner, that is, the end face of one end of the polarity column of the battery cell is horizontally placed in the installation space, so that the two plane sides with the larger area of the battery cell are parallel to the bottom plate plane, and the end face of one end of the polarity column is parallel to the side wall surface of the box body 1. In this way, the two surfaces in the thickness direction Z of the stacked battery cell module 2 abut against the fixing plates to realize the limitation of the battery cell module 2.

[0036] When specifically arranged, the overall structure of the pre-tightening pressing plate 4 is a strip-shaped structure. Connecting ends are provided at both ends of the pre-tightening pressing plate 4, and the two connecting ends are connected to the limit support blocks 3 on both sides to apply a pre-tightening force to the upper surface of the battery cell module 2, realize continuous pre-tightening of the battery module, improve the stability of the battery cell module 2, and the overall structure is flat, which can facilitate the rapid heat dissipation of the battery during use and improve the use performance of the battery.

[0037] Further, both ends of the pre-tightening pressing plate 4 are connected to the limit support blocks 3 to form a limit space for the battery cell module 2, and the distance between the bottom surface of the pre-tightening pressing plate 4 and the bottom plate 12 is less than the height of the battery cell module 2. That is, the height of the limit space is less than the height after multiple battery cells are stacked, which can apply a pre-tightening force to the upper surface of the battery cell module 2, so that during use, the battery cell module 2 continuously applies a pre-tightening force through the pre-tightening pressing plate 4 to ensure that the battery cells have good performance during use.

[0038] In a specific embodiment, the pre-tightening pressing plate 4 includes a main body plate and "U"-shaped structural plates formed by connecting side plates at both ends. When connecting, the side plates at both ends are connected to the limit support blocks 3, so as to be able to apply a pre-tightening force to the battery cell module 2 to ensure the stability of the battery cell module 2 and the stability of its performance.

[0039] In the embodiment provided by the present utility model, as Figure 2 shown, fixing plates are arranged on both sides of the bottom plate 12 in the first direction X, baffles are arranged on both sides of the bottom plate 12 in the second direction Y, the upper cover 11 is connected to the baffles, and the first direction X is perpendicular to the second direction Y. When arranging the battery pack, it is necessary to reduce the overall volume occupation, be as miniaturized as possible and meet the heat dissipation requirements. In this embodiment, the bottom plate 12 is a square structure as a whole. Fixing plates are arranged on both sides of the bottom plate 12 in the first direction X, and baffles are arranged on both sides of the bottom plate 12 in the second direction Y, so that a limit space can be formed, thereby realizing the limitation of the battery cell module 2, ensuring the stability of the battery cell module 2, with high overall space utilization rate, and the overall shape tending to be flat, which is beneficial to heat dissipation and improves the use performance of the battery pack.

[0040] Specifically, as Figure 6 shown, the first direction X is the front-back direction in the view. That is, fixing plates are arranged at the edge positions on the front and back sides of the bottom plate 12, and bolt holes are arranged on the fixing plates for connecting the limit support blocks 3 to realize the connection between the limit support blocks 3 and the fixing plates, so as to be able to limit the side surfaces on the front and back sides of the battery cell module 2 and prevent the battery cell module 2 from shaking back and forth.

[0041] In a specific example, as Figure 5 shown, the battery cell module 2 is formed by stacking multiple battery cells, and connection pieces 21 are arranged between adjacent battery cells. The connection pieces 21 are used to fix adjacent two battery cells and form a circuit. Usually, the battery cell module 2 is formed by stacking and connecting multiple battery cells. In this embodiment, multiple battery cells are stacked to form a battery cell stack group, and multiple battery cell stack groups are arranged side by side, so that the width and length of the battery cell module 2 are both greater than the thickness of the battery cell module 2, forming a flat structure, which can reduce the overall space occupation of the battery pack and is beneficial to the heat dissipation of the battery cell module 2.

[0042] It can be understood that in this embodiment, the arrangement method of multiple battery cell groups (the parts where multiple single battery cells are stacked separately) can arrange as many battery cells as possible within a flat structure, and a stable pre-tightening structure can be formed through the cooperation and connection of the limit support block 3 and the pre-tightening pressure plate 4, realizing the stable connection of the battery cell module 2 and taking into account the heat dissipation of the battery cells and the overall size requirements.

[0043] In a specific implementation manner, one side of the accommodation space is provided with an opening, and a panel 5 is arranged in the opening. The overall interior of the box body 1 has an accommodation space for the battery cell module 2 and various components. In this embodiment, an opening is arranged on one side of the accommodation space, and the arrangement of the opening can facilitate disassembly and maintenance and the inspection of internal circuits.

[0044] It can be understood that on the overall structure of the battery pack, a stop block or other functional modules are arranged in the opening to block the opening. In this embodiment, the panel 5 is arranged in the opening. On the one hand, it can close the opening, making the internal space of the box body 1 relatively stable. On the other hand, it can realize the quick wiring and corresponding control of the battery cell module 2 by controlling the panel 5.

[0045] When specifically setting, the panel 5 is of a sheet metal structure. Handles 51 are arranged at both ends of the outer surface of the panel 5. The handles 51 are used for convenient holding and carrying. A wiring terminal 7 is arranged on the outer surface of the panel 5 near one end. The wiring terminal 7 is used to realize the connection between the external wire and the internal circuit. Of course, other wiring ports and indicator light display holes are also arranged on the panel 5.

[0046] Specifically, as Figure 2 shown, the battery pack further includes a battery management and protection board 6. The battery management and protection board 6 is connected to the bottom plate 12 and is located in the opening. When connecting, the battery management and protection board 6 is connected to the inner surface of the panel 5. The battery management and protection board 6 is connected to the sensing components inside the battery cell module 2. The sensing components can collect the working states of the battery cells and process them through the battery management and protection board 6 to collect the working information of all battery cells and circuits.

[0047] It can be understood that through the battery management and protection board 6, some corresponding measures can be taken based on the collected information to maintain or manage the battery pack, so as to improve the service life of the battery pack or enhance the performance.

[0048] In a specific implementation manner, as Figure 5 shown, a connecting part 211 is connected to the connecting piece 21 of each battery cell during quality inspection. The connecting part 211 is used to connect with the acquisition wire harness. The connecting part 211 can facilitate the connection of the acquisition wire harness, realize the input of the acquisition information into the battery management and protection board 6, and collect the working information of all battery cell circuits through the battery management and protection board 6.

[0049] Optionally, the connecting portion 211 may be a fixed convex point for connection or other connecting columns or the like, which facilitates the connection of the harness and realizes quick and stable connection.

[0050] In the example provided by the present utility model, a plurality of battery cell modules 2 are provided in the accommodation space, and the end faces of the polarity columns on adjacent battery cell modules 2 are arranged opposite to each other. By providing a plurality of battery cell modules 2, the performance of the battery pack can be improved. In this embodiment, the adjacent battery cell modules 2 are arranged in an opposed manner, which enables the end faces of the polarity columns to be arranged opposite to each other, enables the edge circuit layout, reduces the space occupied by the plurality of battery cell modules 2, and makes the overall structure more compact.

[0051] It can be understood that, as Figure 3 , Figure 4 shown, connection pieces 21 and other wires need to be provided on the end faces of the polarity columns of the battery cells, so that a part of the space needs to be occupied on this side. In this embodiment, the end faces of the polarity columns of the two battery cell modules 2 are arranged opposite to each other, which can reduce the length of the series connection wire row between the adjacent two battery cell modules 2, make full use of the corresponding space, enable the two battery cell modules 2 to share the layout space of the end faces of the polarity columns, and make the overall structure more compact.

[0052] In an embodiment of the present utility model, as Figure 4 shown, an insulating separator 8 is provided between adjacent battery cell modules 2, and a plurality of strengthening portions are provided on the separator 8, and the plurality of strengthening portions are arranged at intervals. When the polar end faces of the two battery cell modules 2 are arranged opposite to each other, it is necessary to avoid the influence between the two end faces. In this embodiment, by providing the separator 8 between the two, the distinction between the two battery cell modules 2 can be realized, so as to ensure the stable operation of the two battery cell modules 2.

[0053] It can be understood that by providing the strengthening portions, the structural strength of the separator 8 can be improved, making the separator 8 more stable. And the separator 8 can be made of epoxy resin material to provide good insulation performance.

[0054] Specifically, a connection row 10 is provided between adjacent battery cell modules 2, and the connection row 10 is used to realize the series connection between adjacent battery cell modules 2. In this embodiment, the plurality of battery cells in the battery cell module 2 are connected in series. In this embodiment, the plurality of battery cell modules 2 are connected in series through the connection row 10 to form a complete circuit.

[0055] As Figure 4 shown, it includes two battery cell modules 2, the two battery cell modules 2 are arranged opposite to each other, the battery cells in the two battery cell modules 2 are all connected in series by the method of "positive electrode" and "negative electrode" connection, and the two battery cell modules 2 are connected in series through the connection row 10 to form a loop.

[0056] In the specific implementation provided by the present utility model, an insulating protection plate 9 is provided on each side of the battery cell module 2; among them, a process hole is formed in the protection plate 9 on the side of the battery cell module 2 where the polar columns are located. Through the setting of the protection plate 9, the battery cell module 2 can be effectively protected, and the service life of the battery cell module 2 can be improved.

[0057] Specifically, a first protection plate 9 is provided on the bottom plate 12 in one layer, a second protection plate 9 is provided at the position of the fixing plate on the front and rear sides of the battery module, a third protection plate 9 is provided on the upper surface of the top of the battery module, a fourth protection plate 9 is provided on the side of the battery cell module 2 facing away from the polar end face, and a fifth protection plate 9 is provided on the polar end face of the battery cell module 2. Among them, the first protection plate 9, the second protection plate 9, the third protection plate 9, and the fourth protection plate 9 are all made of propylene insulating protection plates 9, and the thicknesses of the first protection plate 9, the second protection plate 9, the third protection plate 9, and the fourth protection plate 9 are approximately 0.5 millimeters to play an insulating role when the battery is limited. Among them, the fifth protection plate 9 is made of an epoxy resin plate to achieve good insulation.

[0058] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be closely arranged by arranging multiple battery cell modules 2 relatively, so that the size of the battery pack can be smaller and the overall structure is flat, and the battery pack is used for heat dissipation to ensure the stability of the battery cell performance. Further, through the limiting space formed by the limiting support block 3 and the pre-tightening pressure plate 4, a pre-tightening force is applied to the battery cell module 2 through the pre-tightening pressure plate 4, so as to ensure the stability of the battery cell module 2 and provide a stable pre-tightening force, and improve the performance stability during its use.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A battery pack for a horizontal battery cell, characterized in that, Comprising: Cell module; A box body, the box body includes an upper cover and a bottom plate, the upper cover is arranged on the bottom plate and forms a receiving space, the cell module is horizontally arranged in the receiving space; fixing plates are arranged on both sides of the bottom plate; Limit support blocks, each fixing plate is connected with a limit support block, and the cell module is arranged between the limit support blocks; A pre-tightening pressing plate, both ends of the pre-tightening pressing plate are connected with the limit support blocks, and the pre-tightening pressing plate abuts against the top surface of the cell module to apply a vertically downward pre-tightening force to the top surface of the cell module.

2. The battery pack of the horizontal battery cell according to claim 1, wherein, A plurality of cell modules are arranged in the receiving space, and the end faces of the polarity columns on adjacent cell modules are arranged opposite to each other.

3. The battery pack of the horizontal battery cell according to claim 2, wherein An insulating separator is arranged between adjacent cell modules, and a plurality of strengthening parts are arranged on the separator, and the plurality of strengthening parts are arranged at intervals.

4. The battery pack of the horizontal battery cell according to claim 2, wherein A connection row is arranged between adjacent cell modules, and the connection row is used to realize the series connection between adjacent cell modules.

5. The battery pack of the horizontal battery cell according to claim 1, characterized in that, An insulating protection plate is arranged on each surface of the cell module; wherein, a process hole is formed in the protection plate on the side of the cell module where the polarity column is located.

6. The battery pack of the horizontal battery cell according to claim 1, wherein, An opening is arranged on one side of the receiving space, and a panel is arranged in the opening.

7. The battery pack of the horizontal battery cell according to claim 1 or 6, characterized in that, The fixing plates are arranged on both sides of the bottom plate in the first direction, baffles are arranged on both sides of the bottom plate in the second direction, the upper cover is connected with the baffles, and the first direction is perpendicular to the second direction.

8. The battery pack of the horizontal battery cell according to claim 6, wherein, The cell module is formed by stacking a plurality of cells, and a connection piece is arranged between adjacent cells, and the connection piece is used to fix adjacent two cells and form a circuit.

9. The battery pack of the horizontal battery cell according to claim 8, wherein A connection part is arranged on the connection piece, and the connection part is used to connect with a collection wire harness.

10. The battery pack of the horizontal battery cell according to claim 9, characterized in that, It further includes a battery management and protection board, and the battery management and protection board is connected with the panel and is located in the opening.

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