Soft package battery pack structure

Abstract

According to the soft package battery pack structure, in the structure, a first battery pack comprises first partition plates which are transversely stacked, a plurality of first battery cells, a plurality of first foams arranged between the adjacent first battery cells and a plurality of second partition plates; the second battery pack is arranged at the top or the bottom of the first battery pack; the second battery pack comprises a third partition plate, a plurality of second battery cells, a plurality of second foams and a fourth partition plate, which are longitudinally stacked, and a plurality of second foams and fourth partition plates, which are arranged between adjacent second battery cells; the first carrier and the second carrier are arranged on the two sides of the first battery pack and the second battery pack respectively to form an integral structure, the first carrier comprises a first carrier body and a first copper bar, and the second carrier comprises a second carrier body and a second copper bar. According to the structure, when the battery cells cannot be stacked in the transverse direction, the battery cells can be continuously stacked in the longitudinal direction, so that the utilization of the space of the battery compartment is maximized.

Description

Technical Field

[0001] The utility model relates to the technical field of soft-pack battery cells, in particular to a soft-pack battery pack structure. Background Art

[0002] Currently, low-speed electric vehicles primarily use lead-acid and cylindrical batteries. With technological advancements, these vehicles are beginning to utilize soft-pack cells. Compared to lead-acid and cylindrical lithium batteries, soft-pack cells offer greater charge and discharge rates, longer cycle life, and higher energy density. However, traditional soft-pack battery packs are mostly stacked in one direction. Due to the limited battery compartment in a vehicle, stacking cells in only one direction would result in the battery pack being unable to fit.

[0003] The above information disclosed in the background technology section is only used to enhance understanding of the background of the present invention and therefore may contain information that does not constitute the prior art known to ordinary technicians in this field. Utility Model Content

[0004] The purpose of the utility model is to provide a soft-pack battery pack structure capable of stacking battery cells in multiple directions.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] A soft-pack battery pack structure of the utility model includes:

[0007] A first battery pack includes a first separator, a plurality of first battery cells stacked laterally, and a plurality of first foams and a second separator disposed between adjacent first battery cells;

[0008] a second battery pack disposed on top or bottom of the first battery pack, the second battery pack comprising a third separator stacked longitudinally, a plurality of second battery cells, and a plurality of second foams and a fourth separator disposed between adjacent second battery cells;

[0009] The first carrier and the second carrier are respectively arranged on both sides of the first battery group and the second battery group to form an integral structure. The first carrier includes a first carrier body and a first copper busbar, and the second carrier includes a second carrier body and a second copper busbar.

[0010] In the soft-pack battery structure, both the first carrier body and the second carrier body are provided with guide holes passing through the tabs of the first battery cell and the second battery cell.

[0011] In the soft-pack battery structure, the tabs are connected to the first copper bar and the second copper bar respectively.

[0012] In the soft-pack battery pack structure, the first separator, the second separator, the third separator and the fourth separator are all provided with claws.

[0013] In the soft-pack battery pack structure, both the first carrier body and the second carrier body are provided with mounting holes that match the clamping claws.

[0014] In the soft-pack battery pack structure, the first battery pack and the second battery pack have the same length.

[0015] In the soft-pack battery pack structure, both the first battery pack and the second battery pack are rectangular parallelepiped structures.

[0016] In the soft-pack battery pack structure, the first carrier body and the second carrier body are both trapezoidal structures.

[0017] In the soft-pack battery structure, both the first foam and the second foam are provided with double-sided adhesive layers.

[0018] In the soft-pack battery pack structure, the soft-pack battery pack structure is a symmetrical structure.

[0019] In the above technical solution, the present invention provides a soft-pack battery pack structure with the following beneficial effects: the voltage of the soft-pack battery cell is generally 3.2V, and vehicle batteries generally have 48V, 60V, 72V, and 96V, corresponding to the number of soft-pack battery cells of 15, 19, 23, and 30. Due to the size limitations of the battery compartment, when the battery cells cannot be stacked horizontally, this structure can be stacked vertically to maximize the utilization of the battery compartment space. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 This is a structural schematic diagram of a soft-pack battery pack structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the exploded structure of a soft-pack battery pack structure of the present invention.

[0023] Figure 3 This is a schematic diagram of the first battery pack structure of a soft-pack battery pack structure of the present invention.

[0024] Figure 4 This is a structural schematic diagram of a second battery pack of a soft-pack battery pack structure of the present invention.

[0025] Figure 5 This is a structural schematic diagram of the first carrier of a soft-pack battery structure of the present invention.

[0026] Figure 6 This is a structural schematic diagram of the second carrier of a soft-pack battery structure of the present invention.

[0027] The figure is marked as follows: first separator 1, first battery cell 2, first foam 3, second separator 4, third separator 5, second battery cell 6, second foam 7, fourth separator 8, first carrier 9, second carrier 10, tab 11, claw 12, first copper bus 13, first carrier body 14, second carrier body 15, second copper bus 16, guide hole 17. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0033] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0035] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] like Figure 1-6 As shown, in one embodiment, a soft pack battery pack structure of the present invention includes:

[0037] A first battery pack includes a transversely stacked first separator 1, a plurality of first battery cells 2, and a plurality of first foams 3 and second separators 4 disposed between adjacent first battery cells 2;

[0038] A second battery pack is provided on the top or bottom of the first battery pack, the second battery pack comprising a third separator 5 stacked longitudinally, a plurality of second battery cells 6, and a plurality of second foams 7 and a fourth separator 8 provided between adjacent second battery cells 6;

[0039] The first carrier 9 and the second carrier 10 are respectively arranged on both sides of the first battery group and the second battery group to form an integral structure. The first carrier 9 includes a first carrier body 14 and a first copper busbar 13, and the second carrier 10 includes a second carrier body 15 and a second copper busbar 16.

[0040] In a preferred embodiment of the soft-pack battery structure, both the first carrier body 14 and the second carrier body 15 are provided with guide holes 17 passing through the tabs 11 of the first battery cell 2 and the second battery cell 6 .

[0041] In a preferred embodiment of the soft-pack battery structure, the tabs 11 are connected to the first copper bar 13 and the second copper bar 16 respectively.

[0042] In a preferred embodiment of the soft-pack battery structure, the first separator 1 , the second separator 4 , the third separator 5 and the fourth separator 8 are all provided with claws 12 .

[0043] In a preferred embodiment of the soft-pack battery structure, both the first carrier body 14 and the second carrier body 15 are provided with mounting holes that match the clamping claws 12 .

[0044] In a preferred embodiment of the soft-pack battery pack structure, the first battery pack and the second battery pack are the same length.

[0045] In a preferred embodiment of the soft-pack battery pack structure, both the first battery pack and the second battery pack are rectangular parallelepiped structures.

[0046] In a preferred embodiment of the soft-pack battery structure, the first carrier body 14 and the second carrier body 15 are both trapezoidal structures.

[0047] In a preferred embodiment of the soft-pack battery structure, both the first foam 3 and the second foam 7 are provided with a double-sided adhesive layer.

[0048] In a preferred embodiment of the soft-pack battery pack structure, the soft-pack battery pack structure is a symmetrical structure.

[0049] In one embodiment, a first copper busbar 13 and a second copper busbar 16 connect the positive and negative electrodes of the first battery cell 2 and the second battery cell 6 to ensure current flow. The first battery pack is stacked horizontally, and a first foam 3 is placed between the first battery cells 2 of each soft pack of the first battery pack to ensure expansion space for the first battery cells 2 and isolate heat transfer to prevent thermal runaway. The first separator 1 and the second separator 4 of the first battery pack are used to clamp the first battery cells 2 on both sides of the first battery pack to prevent them from moving. The first separator 1 and the second separator 4 are provided with claws 12, and the first carrier 9 and the second carrier 10 are provided with mounting holes that match the claws 12, so that the two can be firmly connected.

[0050] The second battery pack is stacked vertically, and a second foam 7 is placed between the second battery cells 6 of each soft pack of the second battery pack to ensure expansion space for the battery cells and isolate heat transfer to prevent thermal runaway; the third partition 5 and the fourth partition 8 of the second battery pack are on both sides of the second battery pack to clamp the battery cells to prevent them from moving; the third partition 5 and the fourth partition 8 are designed with claws 12, and the first carrier 9 and the second carrier 10 are provided with mounting holes matching the claws 12, so that the two can be firmly connected.

[0051] Guide holes 17 are provided on the first and second carriers 9, 10 to facilitate the passage of the cell tabs 11. After passing through the carriers, the cell tabs 11 are welded to the first and second copper bars 13, 16. Mounting structures are designed on the first and second carriers 9, 10 to secure the first and second copper bars 13, 16. The cell tabs 11 are in a folded state after welding; prior to welding, they are straight and unfolded.

[0052] In one embodiment, the first battery pack is stacked horizontally. The first separator 1 is placed first, followed by the soft-packed first battery cell 2 and the first foam 3. A piece of first foam 3 is placed between each soft-packed first battery cell 2. The foam has double-sided adhesive and is adhered to the soft-packed battery cells on both sides. After the battery cells are placed, the second separator 4 is placed last, and the second battery pack is stacked vertically on top of the first battery pack. The stacking method is the same as the first battery pack. The battery pack tabs 11 are respectively passed through the guide holes 17 of the first carrier 9 and the second carrier 10, and then the battery cell tabs 11 are laser welded to the first carrier 9 and the second carrier 10.

[0053] Finally, it should be noted that the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of this application.

[0054] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A soft pack battery structure, characterized in that: These include, A first battery pack includes a first separator, a plurality of first battery cells stacked laterally, and a plurality of first foams and a second separator disposed between adjacent first battery cells; a second battery pack disposed on top or bottom of the first battery pack, the second battery pack comprising a third separator stacked longitudinally, a plurality of second battery cells, and a plurality of second foams and a fourth separator disposed between adjacent second battery cells; The first carrier and the second carrier are respectively arranged on both sides of the first battery group and the second battery group to form an integral structure. The first carrier includes a first carrier body and a first copper busbar, and the second carrier includes a second carrier body and a second copper busbar.

2. The soft pack battery structure according to claim 1, characterized in that: The first carrier body and the second carrier body both define guide holes that pass through the tabs of the first battery cell and the second battery cell.

3. The soft pack battery structure according to claim 2, characterized in that: The tabs are connected to the first copper bar and the second copper bar respectively.

4. The soft pack battery structure according to claim 1, characterized in that: The first partition plate, the second partition plate, the third partition plate and the fourth partition plate are all provided with claws.

5. The soft pack battery structure according to claim 4, characterized in that: The first carrier body and the second carrier body are both provided with mounting holes that match the claws.

6. The soft pack battery structure according to claim 1, characterized in that: The first battery pack and the second battery pack have the same length.

7. The soft pack battery structure according to claim 1, characterized in that: The first battery pack and the second battery pack are both rectangular parallelepiped structures.

8. The soft pack battery structure according to claim 1, characterized in that: The first carrier body and the second carrier body both have a trapezoidal structure.

9. The soft pack battery structure according to claim 1, characterized in that: The first foam and the second foam are both provided with double-sided adhesive layers.

10. The soft pack battery structure according to claim 1, characterized in that: The soft-pack battery pack structure is a symmetrical structure.

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