Compressible battery pack heat management heat insulation structure

Abstract

The utility model provides a compressible battery pack heat management heat insulation structure which comprises a battery pack shell, a storage battery management system BMS and battery modules, the two battery modules are arranged in the battery pack shell, and the storage battery management system BMS is electrically connected with the battery modules; each battery module comprises battery cells, compression heat insulation plates, fixed end plates, battery cell connecting aluminum palladium and bandages, the multiple battery cells are arranged side by side, the compression heat insulation plates are arranged between the adjacent battery cells, the fixed end plates are arranged on the outer sides of the battery cells arranged at the two ends, and positive electrodes at one ends of the battery cells are connected with negative electrodes at one ends of the adjacent battery cells on the same side through the battery cell connecting aluminum palladium; the positive electrodes of the battery cells at the two ends of one battery module are connected with the negative electrodes of the battery cells at the two ends of the other battery module through the battery cell connecting aluminum palladium; and the bandage sleeves are clamped on the outer sides of the fixed end plates at the two ends of the battery module. According to the battery module, compression isolation is carried out through the compression heat insulation plates between the battery cells, fixed isolation is carried out through the fixed end plates at the two ends of the battery module, and binding is carried out in cooperation with the binding bands. The compressible capacity except for the heat insulation function of the compression heat insulation plate is used for bearing the functions of extrusion and deformation recovery so as to fix the module binding band, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of thermal management of power battery packs, and in particular to a compressible thermal management and heat insulation structure of a battery pack. Background Art

[0002] Generally, inside the power battery pack of an electric motorcycle, an insulation layer is set between the square battery cells to block the heat transfer from the out-of-control cells to the adjacent cells. At the same time, the insulation layer is not completely closed, and convection channels are left between the cells, which is conducive to the heat generated by the out-of-control cells to be dissipated in the entire battery pack to avoid local overheating. Utility Model Content

[0003] The purpose of the utility model is to provide a compressible thermal management and insulation structure for a battery pack, which can compressibly insulate the battery cells in a battery module and facilitate complete binding with binding straps of limited size.

[0004] In order to achieve the above-mentioned purpose, the utility model proposes a compressible battery pack thermal management and insulation structure, comprising a battery pack shell, a battery management system BMS and a battery module, wherein two groups of battery modules are arranged in the battery pack shell, and the battery management system BMS and the battery module are electrically connected; the battery module comprises a battery cell, a compressed insulation plate, a fixed end plate, a battery cell connecting aluminum palladium, and a binding strap, a plurality of the battery cells are arranged side by side, the compressed insulation plate is arranged between adjacent battery cells, the fixed end plates are arranged on the outside of the battery cells at both ends, the positive electrode at one end of the battery cell is connected to the negative electrode at one end of the battery cell on the adjacent same side through the battery cell connecting aluminum palladium, and the positive electrodes of the battery cells at both ends of one battery module are connected to the negative electrodes of the battery cells at both ends of the other battery module through the battery cell connecting aluminum palladium; the binding strap is clamped on the outside of the fixed end plates at both ends of the battery module.

[0005] Furthermore, in the compressible battery pack thermal management and insulation structure, the two groups of battery modules are respectively a first battery module and a second battery module, the first battery module is provided with a support frame, and the battery management system BMS is fixed on the support frame.

[0006] Furthermore, in the compressible battery pack thermal management and insulation structure, the electrode protrusions on the battery cells are provided, and the support frame is provided with electrode grooves for facilitating the passage of the electrodes. The support frame is provided on the battery cells at both ends of the battery module in cooperation with the electrode covers through the electrode grooves, and the support frame is provided with protruding support feet, and the battery management system BMS is fixed on the support feet.

[0007] Furthermore, in the compressible battery pack thermal management and insulation structure, a terminal is provided on the cell connecting aluminum palladium, which is used to connect the cell connecting aluminum palladium respectively placed on the electrodes of the two battery modules and is provided with an angled connecting edge; a raised side foot is provided on the side of the support frame, and the angled connecting edge of the cell connecting aluminum palladium in the first battery module is fixed on the side foot.

[0008] Furthermore, in the compressible battery pack thermal management and insulation structure, side support ridges are provided at both ends of the fixed end plate, and bottom support ridges and raised fixed foot plates are provided in the middle at evenly spaced intervals. Positioning slots are symmetrically provided at both ends of the side support ridges, and the strap sleeve is clamped in the positioning slots of the fixed end plate, and the battery module is fixed in the battery pack shell through the fixed foot plates.

[0009] Furthermore, in the compressible battery pack thermal management and insulation structure, the bottom of the positioning slot and the top of the bottom supporting ridge are on the same plane.

[0010] Furthermore, in the compressible battery pack thermal management and insulation structure, the fixed end plate is a fireproof EVA plate.

[0011] Furthermore, in the compressible battery pack thermal management insulation structure, the compressed insulation board is a fireproof EVA board.

[0012] Furthermore, in the compressible battery pack thermal management and insulation structure, the strap is a PET strap.

[0013] Compared with the prior art, the beneficial effects of the utility model are mainly reflected in: compression and insulation through the compression insulation board between the battery cells, fixed insulation through the fixed end plates at both ends of the battery module, and complete and firm binding with the straps of limited size. At the same time, the compressibility of the compression insulation board in addition to the insulation function is used to undertake the role of extrusion and recovery deformation to fix the module straps, reducing costs and avoiding compression deformation or damage caused by the use of traditional insulation materials, that is, no dust and particles will be generated when compressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the compressible thermal management and insulation structure of the battery pack in the present utility model;

[0015] Figure 2 It is a structural schematic diagram of the battery module in the utility model;

[0016] Figure 3 It is a structural schematic diagram of the first battery module in the utility model;

[0017] Figure 4It is a structural schematic diagram of the second battery module in the utility model;

[0018] Figure 5 It is a structural schematic diagram of the support frame in the utility model. DETAILED DESCRIPTION

[0019] The compressible battery pack thermal management and insulation structure of the utility model will be described in more detail below in conjunction with the schematic diagram, which shows the preferred embodiment of the utility model. It should be understood that those skilled in the art can modify the utility model described herein and still achieve the beneficial effects of the utility model. Therefore, the following description should be understood as being widely known to those skilled in the art and not as a limitation to the utility model.

[0020] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating directions and positional relationships are based on the directions 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 direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific protection scope of the present invention.

[0021] In the present invention, unless otherwise specified and limited, the terms "assembly", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or the two elements can be internally connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, "at least" means one or more, unless otherwise clearly and specifically defined.

[0023] The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the accompanying drawings are in very simplified form and in non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0024] like Figures 1 to 4 As shown, the utility model proposes a compressible battery pack thermal management and insulation structure, including a battery pack shell 1, a battery management system BMS2 and a battery module 3. Two groups of battery modules 3 are arranged in the battery pack shell 1, and the battery management system BMS2 and the battery module 3 are electrically connected; the battery module 3 includes a battery cell 31, a compressed insulation board 32, a fixed end plate 33, a battery cell connecting aluminum palladium 34, and a binding band 35. A plurality of battery cells 31 are arranged side by side, and a compressed insulation board 32 is provided between adjacent battery cells 31. Fixed end plates 33 are provided on the outer sides of the battery cells 31 at both ends. The positive electrode at one end of the battery cell 31 is connected to the negative electrode at one end of the adjacent battery cell 31 on the same side through the battery cell connecting aluminum palladium 34, and the positive electrodes of the battery cells 31 at both ends of one battery module 3 are connected to the negative electrodes of the battery cells 31 at both ends of another battery module 3 through the battery cell connecting aluminum palladium 34; the binding band 35 is clamped on the outer sides of the fixed end plates 33 at both ends of the battery module 3.

[0025] Furthermore, if Figure 1 As shown, the two battery modules 3 are respectively a first battery module 41 and a second battery module 42 . A support frame 5 is provided on the first battery module 41 , and a battery management system BMS2 is fixed on the support frame 5 .

[0026] Specifically, Figure 3 and Figure 5 As shown, the electrode 311 on the battery cell 31 is arranged in a raised manner, and the support frame 5 is provided with an electrode groove 51 for the electrode 311 to pass through. The support frame 5 is covered on the battery cells 31 at both ends of the battery module 3 through the electrode groove 51 and the electrode 311, and the support frame 5 is provided with a raised support foot 52, and the battery management system BMS2 is fixed on the support foot 52.

[0027] Furthermore, if Figures 2 to 4 As shown, a terminal head 341 is provided on the battery cell connecting aluminum palladium 34, which is used to connect the battery cell connecting aluminum palladium 34 respectively placed on the electrodes 311 of the two battery modules 3 and is provided with an angled connecting edge 342; a raised side foot 53 is provided on the side of the support frame 5, and the angled connecting edge 342 of the battery cell connecting aluminum palladium 34 in the first battery module 41 is fixed on the side foot 53.

[0028] Furthermore, if Figure 3 As shown, the fixed end plate 33 is provided with side support ridges 331 at both ends, and the middle is provided with evenly spaced bottom support ridges 332 and a raised fixed foot plate 333. The side support ridges 331 are symmetrically provided with positioning slots 334 at both ends. The straps 35 are inserted into the positioning slots 334 of the fixed end plate 33, and the battery module 3 is fixed in the battery pack housing 1 through the fixed foot plates 333. Preferably, the bottom of the positioning slot 334 and the top of the bottom support ridge 332 are on the same plane. After the straps 35 inserted into the outside of the fixed end plate 33 are inserted into the positioning slot 334, they are pressed against the outside of the bottom support ridge 332.

[0029] Preferably, the strap 35 is a PET strap.

[0030] In addition to the insulation function, the insulation layer of some power battery packs also needs to bear the function of extrusion and recovery deformation as well as the outer binding band 35 of the battery module 3. Therefore, in order to avoid the situation where the insulation layer between the battery cells 31 generates dust and particles when compressed, the compressed insulation board 32 and the fixed end board 33 are directly made of fireproof EVA board, which is used for insulation and compression rebound between the battery cells 31, and has the advantages of low cost, strong compression resistance and small size.

[0031] Specifically, fireproof EVA, whose chemical name is ethylene-vinyl acetate copolymer, is the original EVA product with a fireproof solvent or powder added to it, making the EVA product flame retardant. Generally, fireproof EVA materials are used in decoration and heat insulation materials. In this patent, it is used in electric motorcycle power battery packs to reduce costs.

[0032] like Figure 1 As shown, the battery pack shell 1 of the power battery pack of the present application has two groups of battery modules 2 inside, and each battery module 2 needs to have two straps 35 to fix the battery module 3 into shape. During the production process, the straps 35 need to be completely tightened. The straps 35 are made of PET plastic material, which cannot be completely tightened to bind the battery cells 31, so the insulation material between the battery cells 31 has a certain degree of compressibility. After the battery cells and the compressed insulation board 32 are compressed using tooling, the prefabricated size of the PET strap is slightly shorter than the original size of the uncompressed battery module 3, so that after the PET strap is put on the compressed battery module 3, after the compression force is removed, the entire battery module 3 can be tightened and fixed in size directly by relying on the resilience of the compressed insulation board 32.

[0033] Specifically, existing thermal insulation materials are relatively expensive and easily damaged, and cannot be used in large quantities on electric motorcycle power battery packs. The advantages and disadvantages of general thermal insulation materials are listed as follows:

[0034]

[0035] In summary, in this embodiment, the proposed compressible battery pack thermal management insulation structure is compressed and insulated by the compressed insulation board between the battery cells, fixed and insulated by the fixed end plates at both ends of the battery module, and completely and firmly bound with the straps of limited size. At the same time, the compressibility of the compressed insulation board in addition to the insulation function is used to undertake the role of extrusion and recovery deformation to fix the module straps, which reduces costs and avoids the compression deformation or damage caused by the use of traditional insulation materials, that is, no dust and particles will be generated when compressed.

[0036] The above are only preferred embodiments of the present invention and do not limit the present invention in any way. Any technician in the relevant technical field, without departing from the scope of the technical solution of the present invention, may make any equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, which shall be deemed as the content of the technical solution of the present invention and still fall within the protection scope of the present invention.

Claims

1. A compressible battery pack thermal management and insulation structure, characterized in that: The invention comprises a battery pack shell (1), a battery management system BMS (2) and a battery module (3), wherein two groups of the battery modules (3) are arranged in the battery pack shell (1), and the battery management system BMS (2) and the battery module (3) are electrically connected; the battery module (3) comprises a battery cell (31), a compression heat insulation board (32), a fixed end plate (33), a battery cell connecting aluminum palladium (34), and a binding band (35), wherein a plurality of the battery cells (31) are arranged side by side, and the compression heat insulation board (32) is arranged between adjacent battery cells (31), and the battery cells (31) are connected to each other. The fixed end plates (33) are provided on the outer sides of the battery cells (31) at both ends, and the positive electrode at one end of the battery cell (31) is connected to the negative electrode at one end of the battery cell (31) on the adjacent same side through the battery cell connecting aluminum palladium (34), and the positive electrodes of the battery cells (31) at both ends of one battery module (3) are connected to the negative electrodes of the battery cells (31) at both ends of another battery module (3) through the battery cell connecting aluminum palladium (34); the binding bands (35) are clamped on the outer sides of the fixed end plates (33) at both ends of the battery modules (3).

2. The compressible battery pack thermal management and insulation structure according to claim 1, characterized in that: The two groups of battery modules (3) are respectively a first battery module (41) and a second battery module (42); a support frame (5) is provided on the first battery module (41); and the battery management system BMS (2) is fixed on the support frame (5).

3. The compressible battery pack thermal management and insulation structure according to claim 2, characterized in that: The electrode (311) on the battery cell (31) is arranged in a raised manner, and the support frame (5) is provided with an electrode groove (51) for facilitating the penetration of the electrode (311); the support frame (5) is arranged on the battery cells (31) at both ends of the battery module (3) in cooperation with the electrode (311) through the electrode groove (51), and the support frame (5) is provided with a raised support foot (52), and the battery management system BMS (2) is fixed on the support foot (52).

4. The compressible battery pack thermal management and insulation structure according to claim 3, characterized in that: The battery cell connecting aluminum palladium (34) is provided with a terminal head (341), which is used to connect the battery cell connecting aluminum palladium (34) respectively placed on the electrodes (311) of the two battery modules (3) and is provided with an angled connecting edge (342); the side of the support frame (5) is provided with a protruding side foot (53), and the angled connecting edge (342) of the battery cell connecting aluminum palladium (34) in the first battery module (41) is fixed on the side foot (53).

5. The compressible battery pack thermal management and insulation structure according to claim 1, characterized in that: The fixed end plate (33) is provided with side support edges (331) at both ends, and a bottom support edge (332) and a raised fixed foot plate (333) are provided in the middle. Positioning slots (334) are symmetrically provided at both ends of the side support edge (331). The binding strap (35) is clamped in the positioning slot (334) of the fixed end plate (33), and the battery module (3) is fixed in the battery pack housing (1) through the fixed foot plate (333).

6. The compressible battery pack thermal management and insulation structure according to claim 5, characterized in that: The bottom of the positioning slot (334) and the top of the bottom supporting ridge (332) are on the same plane.

7. The compressible battery pack thermal management and insulation structure according to claim 1, characterized in that: The fixed end plate (33) is a fireproof EVA plate.

8. The compressible battery pack thermal management and insulation structure according to claim 1, characterized in that: The compressed heat insulation board (32) is a fireproof EVA board.

9. The compressible battery pack thermal management and insulation structure according to claim 1, characterized in that: The binding tape (35) is a PET binding tape.

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