Stacked battery system

Abstract

The utility model discloses a stacked battery system. The stacked battery system comprises a plurality of battery single packs, a plurality of fasteners and a plurality of supporting pieces, the plurality of single battery packs are stacked along a first direction; the plurality of fasteners are respectively connected with two adjacent single battery packs; the plurality of supporting pieces are connected with the single battery packs, and the supporting pieces support adjacent single battery packs in the plurality of single battery packs along a first direction; according to the stacked battery system disclosed by the utility model, a fixed frame structure is not needed between the adjacent single battery packs, the single battery packs are directly interlocked, and the box bodies of the single battery packs are used as carriers for bearing weight, so that the fixed frame structure of the single battery packs is omitted, and the integration level and the space utilization rate of the stacked battery system are improved; and the stacked battery system is more convenient to assemble or disassemble.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a stacked battery system. Background Technology

[0002] Traditional heavy-duty truck stacked battery systems use multiple individual battery packs mounted on a support frame to form a battery system. This design has the following drawbacks: 1. The structure of the fixed support frame for each battery pack is complex and heavy, resulting in low space utilization and low energy density of the battery system; 2. The battery components stacked on the support frame are numerous and complex, making it inconvenient to assemble or disassemble the system. Utility Model Content

[0003] One objective of this invention is to provide a stacked battery system that addresses the technical problems of low space utilization, low energy density, and inconvenient disassembly in stacked battery systems.

[0004] To achieve the above objectives, the present invention provides a solution as follows: a stacked battery system, which includes multiple battery packs, multiple fasteners, and multiple support members; the multiple battery packs are stacked along a first direction; the multiple fasteners are respectively connected to two adjacent battery packs; the multiple support members are connected to the battery packs, and the support members support adjacent battery packs in the multiple battery packs along the first direction.

[0005] Optionally, the support includes a vertical part and a horizontal part, with the horizontal part disposed at opposite ends of the vertical part and abutting against opposite sides of the battery pack along a first direction.

[0006] Optionally, the support member further includes a first inclined portion and a second inclined portion that intersect each other, the first inclined portion passing through the vertical portion and connecting to the horizontal portions located at opposite ends of the vertical portion, and the second inclined portion passing through the vertical portion and connecting to the horizontal portions located at opposite ends of the vertical portion.

[0007] Optionally, the support member also includes a reinforcing part, which is disposed at the junction of the first inclined part, the second inclined part, and the vertical part.

[0008] Optionally, the fastener is connected to the transverse portion located on the adjacent battery pack, and connects two adjacent battery packs respectively.

[0009] Optionally, the battery pack includes a housing and multiple individual batteries, with the multiple individual batteries arranged in the housing and the housing stacked along a first direction; the housing includes side walls, a bottom wall and a skirt, the side walls and the bottom wall are connected to form a receiving cavity for accommodating multiple individual batteries, the opposite ends of the skirt and the side walls are connected and extend away from the receiving cavity, the skirt and the side walls together form a limiting groove for accommodating multiple support members, and the support members abut against the skirt.

[0010] Optionally, the support is fitted to the sidewall.

[0011] Optionally, the housing also includes a hook, which and the skirt are connected to form a sliding groove. The opening of the sliding groove is opposite to the opening of the limiting groove, and the skirt on the adjacent housing is slidably fitted into the sliding groove.

[0012] Optionally, finite grooves are formed along both the second and third directions, with the first, second, and third directions being perpendicular to each other.

[0013] Optionally, the end of the single cell with the terminal post is placed along the first direction; the stacked battery system also includes a top cover plate, which covers the receiving cavity located on top of the stacked battery system, and the top cover plate, side walls and bottom walls are provided with flow channels for liquid flow.

[0014] The beneficial effects of this utility model are as follows:

[0015] Multiple battery packs are stacked together along a first direction and then locked together with fasteners. Support members are connected to the battery packs and support adjacent battery packs along the stacking direction. No fixed frame structure is required between adjacent battery packs; they are directly interlocked, with the battery pack housing acting as the weight-bearing carrier. This eliminates the need for a fixed frame structure, improving the integration and space utilization of the stacked battery system, freeing up more space for battery assembly, and thus increasing energy density. Furthermore, it makes assembling and disassembling the stacked battery system more convenient. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the stacked battery system provided in an embodiment of the present invention;

[0018] Figure 2 This is provided by the embodiment of the present utility model. Figure 1 A magnified schematic diagram of a portion of region A in the middle;

[0019] Figure 3 This is a schematic diagram of the structure of a single battery pack provided in an embodiment of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of two battery packs stacked together according to an embodiment of the present invention.

[0021] Reference numerals: Flow channel 000, Battery pack 100, Box body 10, Side wall 11, Skirt 13, Limiting groove 14, Hook 15, Slide groove 16, Individual battery 20, Fastener 200, Support 300, Vertical part 310, Horizontal part 320, First inclined part 330, Second inclined part 340, Reinforcing part 350

[0022] Top cover plate 400. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1 to 3 As shown, Figure 1 This is a schematic diagram of the stacked battery system provided in an embodiment of the present invention. Figure 2 This is provided by the embodiment of the present utility model. Figure 1 A magnified schematic diagram of a portion of region A in the middle. Figure 3 This is a schematic diagram of the structure of the battery pack 100 provided in this embodiment of the utility model.

[0025] This utility model provides a stacked battery system, which includes multiple battery packs 100, multiple fasteners 200, and multiple support members 300. The multiple battery packs 100 are stacked along a first direction, where each battery pack 100 is a sub-energy storage unit. The first direction can be the thickness direction of the battery pack 100, allowing the stacked battery system to stack more battery packs 100 at the same height. The multiple fasteners 200 connect adjacent battery packs 100 respectively; each fastener 200 connects two adjacent battery packs 100. Each pair of battery packs 100 can be connected together by multiple fasteners 200. The number of fasteners 200 can be 2, 5, 10, 20, etc., and the fasteners 200 can be screws, rivets, etc. Multiple support members 300 are connected to battery packs 100. The support members 300 support adjacent battery packs 100 in the first direction and support adjacent battery packs 100 in the stacking direction of the multiple battery packs 100.

[0026] In this embodiment, multiple battery packs 100 are stacked together along a first direction and then locked together by fasteners 200. A support member 300 is connected to the battery packs 100 and supports adjacent battery packs 100 along the stacking direction. No fixed frame structure is required between adjacent battery packs 100; they are directly interlocked, with the housing 10 of each battery pack serving as the weight-bearing carrier. This eliminates the need for a fixed frame structure, thereby improving the integration and space utilization of the stacked battery system, freeing up more space for battery assembly, and thus increasing energy density. Furthermore, it makes assembling or disassembling the stacked battery system more convenient.

[0027] Specifically, the support member 300 includes a vertical portion 310 and a horizontal portion 320. The horizontal portions 320 are disposed at opposite ends of the vertical portion 310. Each end of the vertical portion 310 may have one or two horizontal portions 320, etc. The vertical portion 310 and the horizontal portions 320 can form an I-shape. The horizontal portions 320 abut against opposite sides of the battery pack 100 along a first direction. In this embodiment, the opposite ends of the vertical portion 310 are connected to the horizontal portions 320. The vertical portion 310 extends along the first direction, and the horizontal portion 320 extends perpendicular to the first direction. The vertical portion 310 supports the battery pack 100 in the first direction through the horizontal portions 320, and the horizontal portions 320 ensure the contact area between the support member 300 and the battery pack 100.

[0028] Furthermore, the support member 300 also includes a first inclined portion 330 and a second inclined portion 340 that intersect each other. The first inclined portion 330 passes through the vertical portion 310 and connects to the horizontal portions 320 located at opposite ends of the vertical portion 310. The second inclined portion 340 passes through the vertical portion 310 and connects to the horizontal portions 320 located at opposite ends of the vertical portion 310. Understandably, the first inclined portion 330 and the second inclined portion 340 support the opposite ends of the horizontal portions 320, and the vertical portion 310 supports the middle of the horizontal portions 320. Their cooperation improves the stability of the horizontal portions 320. In addition, the first inclined portion 330 and the second inclined portion 340 also share the pressure borne by the vertical portion 310 to a certain extent, preventing deformation of the vertical portion 310. The terms "first inclined portion 330" and "second inclined portion 340" are used here only as designations, not as a quantity limitation. The number of first inclined portions 330 and the number of second inclined portions 340 can be one or more.

[0029] Furthermore, the support member 300 also includes a reinforcing portion 350, which is disposed at the junction of the first inclined portion 330, the second inclined portion 340, and the vertical portion 310. The reinforcing portion 350 has a block structure and acts as a fulcrum to support the first inclined portion 330, the second inclined portion 340, and the vertical portion 310 respectively, thereby improving the overall stability of the support member 300. The reinforcing portion 350 can be circular, square, etc., and can also be a solid or hollow structure.

[0030] In one embodiment, the fastener 200 is connected to the horizontal portion 320 located on an adjacent battery pack 100, and connects two adjacent battery packs 100 respectively. The fastener 200 passes through the horizontal portion 320, the two battery packs 100, and the horizontal portion 320 in sequence. The fastener 200 simultaneously fixes the two support members 300 and the two battery packs 100, thereby fixing the support members 300 while fixing the two adjacent battery packs 100, eliminating the need for a separate fixing process for the support members 300. Of course, the support members 300 can also be fixed to the battery packs 100 by adhesive or welding.

[0031] Specifically, the battery pack 100 includes a housing 10 and multiple individual batteries 20. The multiple individual batteries 20 are arranged in the housing 10. The multiple individual batteries 20 can be connected in series, in parallel, or in a series-parallel configuration. The housing 10 is stacked along a first direction. The housing 10 can not only accommodate multiple individual batteries 20, but also serve as a frame structure to support the multiple individual batteries 20 and other multiple individual batteries 20 stacked together.

[0032] The housing 10 includes a side wall 11, a bottom wall, and a skirt 13. The side wall 11 and the bottom wall are connected to form a cavity for accommodating multiple individual batteries 20. The skirt 13 is connected to the opposite ends of the side wall 11 and extends away from the cavity. The skirt 13 and the side wall 11 together form a limiting groove 14 for accommodating multiple support members 300. The support members 300 abut against the skirt 13, thereby supporting the skirt 13 from a first direction. As described in the above embodiment, the horizontal portion 320 contacts the skirt 13 at both ends of the side wall 11, and the vertical portion 310 supports the skirt 13 through the horizontal portion 320. In this embodiment, by providing a skirt 13 extending away from the cavity on the side wall 11, and forming a limiting groove 14 for accommodating the support member 300 on the side of the side wall 11 away from the cavity, the support member 300 and the individual battery 20 are separated. The support member 300 supports the housing 10 along the first direction without occupying the installation space of the individual battery 20.

[0033] The support member 300 is further fitted to the side wall 11, with the side of the support member 300 facing the side wall 11 fitting against it. The support member 300 and the side wall 11 form an integral unit, thereby providing lateral support to the support member 300 from the side wall 11 and preventing lateral deformation of the support member 300. The support member 300 and the side wall 11 can be fitted together by bonding, welding, or by directly resting against the side wall 11.

[0034] In one embodiment, limiting grooves 14 are formed along both the second and third directions, and the first, second, and third directions are perpendicular to each other. Specifically, the second direction can be the width direction of the battery pack 100, and the third direction can be the length direction of the battery pack 100. In this embodiment, the sidewalls 11 surrounding the receiving cavity form limiting grooves 14 with the skirt 13, and each limiting groove 14 is equipped with at least one support member 300, so that the housing 10 is supported in both the second and third directions, the overall strength of the housing 10 is enhanced, and there are no weak points.

[0035] Furthermore, the end of the individual battery 20 with the terminal post is positioned along the first direction, and the terminal post end of the individual battery 20 can face the opening of the receiving cavity. After multiple housings 10 are stacked, the terminal post end of the individual battery 20 faces the bottom wall of the adjacent housing 10, and the bottom of the individual battery 20 faces the bottom wall. Flow channels 000 are provided on both the side wall 11 and the bottom wall. The flow channels 000 are used to supply liquid flow, thereby playing a role in cooling, and thus cooling the individual battery 20 that is in contact with the side wall 11 and the bottom wall.

[0036] The stacked battery system also includes a top cover 400, which covers the receiving cavity located at the top of the stacked battery system. The top cover 400 is provided with a flow channel 000 for liquid flow. Multiple housings 10 are stacked together along a first direction. The housing 10 at the first position is in an open state, and the openings of the receiving cavities of the subsequent housings 10 are covered by adjacent bottom walls, thereby reusing the bottom walls and further reducing the number of components. In addition, the bottom walls also serve a cooling function. The top cover 400 can close the housing 10 at the first position, so that the housings 10 in the stacked state are closed from top to bottom. All surfaces of the individual battery cells 20 can be cooled to allow the individual battery cells 20 to operate at a suitable temperature.

[0037] Please see Figures 1 to 4 As shown, Figure 4 This is a schematic diagram of the structure of two battery packs 100 stacked together according to an embodiment of the present invention.

[0038] The housing 10 also includes a hook 15, which, together with the skirt 13, forms a groove 16. The opening of the groove 16 is opposite to the opening of the limiting groove 14, and the opening of the groove 16 is perpendicular to the first direction. The skirt 13 on adjacent housings 10 slides into the groove 16. During assembly, housings 10 are slidably fitted together with other housings 10 along the extension direction of the groove 16. Housings 10 and other housings 10 are constrained in the first direction, thereby preventing displacement between housings 10, so that fasteners 200 can connect adjacent housings 10 together.

[0039] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0040] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0041] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0042] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A stacked battery system, characterized in that, include: Multiple battery packs are stacked along a first direction; Multiple fasteners are used to connect two adjacent battery packs, respectively. as well as Multiple support members are connected to the battery pack, and the support members support adjacent battery packs among the multiple battery packs along the first direction.

2. The stacked battery system according to claim 1, characterized in that, The support member includes a vertical part and a horizontal part, the horizontal part is disposed at opposite ends of the vertical part, and the horizontal part abuts against opposite sides of the battery pack along the first direction.

3. The stacked battery system according to claim 2, characterized in that, The support member further includes a first inclined portion and a second inclined portion that intersect each other. The first inclined portion passes through the vertical portion and is connected to the horizontal portions located at opposite ends of the vertical portion. The second inclined portion passes through the vertical portion and is connected to the horizontal portions located at opposite ends of the vertical portion.

4. The stacked battery system according to claim 3, characterized in that, The support member also includes a reinforcing part, which is disposed at the junction of the first inclined part, the second inclined part, and the vertical part.

5. The stacked battery system according to claim 2, characterized in that, The fastener is connected to the transverse portion located on the adjacent battery pack, and connects to two adjacent battery packs respectively.

6. The stacked battery system according to claim 1, characterized in that, The battery pack includes a housing and multiple individual batteries, the multiple individual batteries being arranged in the housing, and the housing being stacked along the first direction; The housing includes side walls, a bottom wall, and a skirt. The side walls and the bottom wall are connected to form a cavity for accommodating the multiple individual batteries. The skirt and the opposite ends of the side walls are connected and extend away from the cavity. The skirt and the side walls together form a limiting groove for accommodating the multiple support members. The support members abut against the skirt.

7. The stacked battery system according to claim 6, characterized in that, The support member is attached to the side wall.

8. The stacked battery system according to claim 6, characterized in that, The box body also includes a hook, which and the skirt are connected to form a sliding groove. The opening of the sliding groove is opposite to the opening of the limiting groove, and the skirt on the adjacent box body slides into the sliding groove.

9. The stacked battery system according to claim 6, characterized in that, The limiting grooves are formed along the second direction and the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

10. The stacked battery system according to claim 6, characterized in that, The end of the single battery cell with the electrode post is placed along the first direction; The stacked battery system also includes a top cover plate that covers the receiving cavity located at the top of the stacked battery system. The top cover plate, the side walls, and the bottom wall are all provided with flow channels for liquid flow.

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