Soft-package battery pack structure of low-speed vehicle

Abstract

The utility model discloses a soft-package battery pack structure of a low-speed vehicle. The soft-package battery pack structure comprises a box body and a battery cell module arranged in the box body, the upper cover is arranged at the opening end of the box body; the battery cell module is divided into a first module and a second module, a vertical plate is arranged between the first module and the second module, the vertical plate is provided with a vertical plate heat conduction pad, and heat between the first module and the second module is conducted through the vertical plate heat conduction pad; a heat conducting pad is arranged on the battery cell module and is in contact with the top surfaces and the side surfaces of the first module and the second module; heat-conducting glue is arranged between the heat-conducting pad and the box body, and heat of the module is conducted to the heat-conducting glue through the heat-conducting pad and conducted to the outside of the box body. According to the soft-package battery pack structure, two heat dissipation paths are designed, so that heat generated by the battery cells and the BMS protection plate can be transferred to the outside of the box body in time, and thermal runaway caused by over-high temperature of the battery pack is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to low -speed car battery technical field especially relates to a kind of soft package battery pack structure for electric bicycle, electric motorcycle, electric tricycle and electric four-wheel car etc. BACKGROUND

[0002] At present, low-speed electric vehicle is mainly lead-acid battery and cylindrical battery, with the progress of technology, low-speed electric vehicle begins to use soft package battery, soft package battery is greater than lead-acid battery and cylindrical lithium battery, charge-discharge rate is longer, energy density is higher.But in the battery pack of traditional lead-acid battery, cylindrical battery and soft package battery, there is no heat dissipation path, the heat generated by cell and BMS protection plate cannot be exported from the box in time, so that battery occurs thermal runaway, affect vehicle and personnel safety.

[0003] Therefore, based on the above technical problems, the technical personnel in the art need to develop a kind of low-speed car soft package battery pack structure. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of low-speed car soft package battery pack structure, the structure design has two heat dissipation paths, can the heat generated by cell and BMS protection plate be transferred to the outside of box in time, guarantee that battery pack temperature is not too high and occurs thermal runaway.

[0005] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A kind of low-speed car soft package battery pack structure of the utility model, the structure includes:

[0007] Box body;

[0008] The cell module placed in the box body;And

[0009] Upper cover installed in the open end of the box body;

[0010] The cell module is divided into first module and second module, and the first module and the second module are provided with vertical plate, the vertical plate has vertical plate heat conduction pad, and the heat between the first module and the second module is conducted through the vertical plate heat conduction pad;

[0011] Heat conduction pad is provided on the cell module, and the heat conduction pad contacts the top surface and the side surface of the first module and the second module;

[0012] Heat conduction pad and the box body are provided with heat conduction glue, and the heat of module is conducted to the heat conduction glue and the outside of the box body through the heat conduction pad.

[0013] Further, the first module and the second module are arranged side by side, and the height of the first module is greater than the height of the second module.

[0014] The bottom of the cell module is provided with a bottom plate.

[0015] The first module comprises a plurality of cells, and the upper end of the cell of the first module is provided with a first top plate, and the first top plate and the cell are provided with foam therebetween.

[0016] The second module comprises a plurality of cells, and the upper end of the cell of the second module is provided with a second top plate, and the second top plate and the cell are provided with foam therebetween.

[0017] Further, the vertical plate comprises:

[0018] a vertical plate body; and

[0019] a vertical plate heat-conducting pad arranged on the two side surfaces of the vertical plate body.

[0020] Further, the heat-conducting pad comprises:

[0021] an upper heat-conducting pad; and

[0022] a side heat-conducting pad formed on the two side surfaces of the upper heat-conducting pad;

[0023] the upper heat-conducting pad abuts against the upper end of the first module and the second module, and the position where the upper heat-conducting pad cooperates with the transition area of the first module and the second module is formed into a heat-conducting pad overlapping area, and the vertical plate heat-conducting pad contacts the heat-conducting pad overlapping area;

[0024] the side heat-conducting pads respectively contact the outer side surfaces of the first module and the second module.

[0025] Further, the second top plate of the second module is provided with a BMS protection plate.

[0026] Further, the first module and the second module are respectively provided with a first carrier and a second carrier at the two ends in the length direction;

[0027] the first carrier and the second carrier are respectively clamped with the end of the top plate through a clamping jaw.

[0028] Further, the first module and the second module are respectively provided with a first carrier and a second carrier at the two ends in the length direction;

[0029] In the above technical solution, the low-speed vehicle soft package battery pack structure has the following beneficial effects:

[0030] The soft package battery pack structure has two heat dissipation paths, can timely transfer heat generated by the battery cell and the BMS protection plate to the outside of the box, and ensures that the battery pack temperature is not too high to cause thermal runaway. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0032] Figure 1 A structural schematic view of a low-speed vehicle soft package battery pack structure disclosed by the embodiments of the present application;

[0033] Figure 2 An exploded view of a low-speed vehicle soft package battery pack structure disclosed by the embodiments of the present application;

[0034] Figure 3 A structural exploded view of a battery cell module of a low-speed vehicle soft package battery pack structure disclosed by the embodiments of the present application;

[0035] Figure 4 A structural schematic view of a first module of a low-speed vehicle soft package battery pack structure disclosed by the embodiments of the present application;

[0036] Figure 5 A structural schematic view of a first module and a second module combined state of a low-speed vehicle soft package battery pack structure disclosed by the embodiments of the present application;

[0037] Figure 6 A structural schematic view of a low-speed vehicle soft package battery pack structure after integrating a BMS protection plate disclosed by the embodiments of the present application;

[0038] Figure 7 A front view of a vertical plate of a low-speed vehicle soft package battery pack structure disclosed by the embodiments of the present application;

[0039] Figure 8 A sectional view of a vertical plate of a low-speed vehicle soft package battery pack structure disclosed by the embodiments of the present application;

[0040] Figure 9 A heat dissipation path schematic view of a low-speed vehicle soft package battery pack structure disclosed by the embodiments of the present application.

[0041] Explanation of reference signs:

[0042] 10, battery cell module; 11, box; 12, upper cover; 13, glue blocking foam; 14, clamping hole; 15, clamping jaw; 16, heat-conducting glue;

[0043] 1, the first module; 2, the second module; 3, the cell; 4, the bottom plate; 5, the vertical plate; 6, the foam; 8, the heat-conducting pad; 9, the BMS protection plate;

[0044] 101, the first top plate;

[0045] 201, the second top plate;

[0046] 501, the vertical plate body; 502, the vertical plate heat-conducting pad;

[0047] 701, the first carrier; 702, the second carrier;

[0048] 801, the upper heat-conducting pad; 802, the side heat-conducting pad; 803, the heat-conducting pad overlapping area. DETAILED DESCRIPTION

[0049] In order to make the technical personnel in the art better understand the technical scheme of the utility model, the utility model will be further described in detail below in conjunction with the drawings.

[0050] Referring to Figures 1 to 9 As shown in the figure;

[0051] The embodiment discloses a low-speed vehicle soft package battery pack structure, which comprises:

[0052] The box body 11;

[0053] The cell module 10 is arranged in the box body 11; and

[0054] The upper cover 12 is installed at the open end of the box body 11;

[0055] The cell module 10 is divided into the first module 1 and the second module 2, and the vertical plate 5 is arranged between the first module 1 and the second module 2, the vertical plate 5 has the vertical plate heat-conducting pad 502, and the heat between the first module 1 and the second module 2 is conducted through the vertical plate heat-conducting pad 502;

[0056] The heat-conducting pad 8 is arranged on the cell module 10, and the heat-conducting pad 8 contacts the top surface and the side surface of the first module 1 and the second module 2;

[0057] The heat-conducting pad 8 and the box body 11 are provided with the heat-conducting glue 16, the heat of the module is conducted to the heat-conducting glue 16 through the heat-conducting pad 8 and is conducted to the outside of the box body 11.

[0058] Specifically, the embodiment discloses a low-speed vehicle soft package battery pack structure, which comprises a box body 11, a battery cell module 10 and an upper cover 12; wherein the battery cell module 10 is divided into a first module 1 and a second module 2 arranged side by side; in order to lead out the heat between the first module 1 and the second module 2, a vertical plate 5 is arranged between the first module 1 and the second module 2, the heat is conducted to the heat conduction pad 8 above through the vertical plate heat conduction pad 502, and the heat is conducted to the box body 11 through the heat conduction pad 8 and the heat conduction adhesive 16 and finally conducted to the outside of the box body 11. The traditional design does not have the design of the heat conduction pad 8 and the heat conduction adhesive 16, only the foam 6 between the module and the box body 11, so that the heat transfer efficiency is low, and the heat cannot be transferred to the outside of the box body 11 in time in the process of charging and discharging. The vertical plate heat conduction pad 502, the heat conduction pad 8 and the heat conduction adhesive 16 are designed in the embodiment, so that the heat transfer efficiency of heat conduction at different positions of the module is improved, the heat of the battery cell 3 and the BMS protection plate 9 can be led out in time, and the safety of the battery pack is ensured.

[0059] Preferably, the first module 1 and the second module 2 of the embodiment are arranged side by side, and the height of the first module 1 is greater than the height of the second module 2.

[0060] The bottom of the battery cell module 10 is provided with a bottom plate 4.

[0061] The first module 1 of the embodiment comprises a plurality of battery cells 3, and the upper end of the battery cell 3 of the first module 1 is provided with a first top plate 101, and the first top plate 101 and the battery cell 3 are provided with the foam 6.

[0062] The second module 2 comprises a plurality of battery cells 3, and the upper end of the battery cell 3 of the second module 2 is provided with a second top plate 201, and the second top plate 201 and the battery cell 3 are provided with the foam 6.

[0063] The vertical plate 5 of the embodiment comprises a vertical plate body 501 and a vertical plate heat conduction pad 502 arranged on the two side surfaces of the vertical plate body 501.

[0064] Firstly, the structure of the battery cell module 10 and the structure of the vertical plate 5 between the first module 1 and the second module 2 are further limited in the embodiment; as shown in the figure, Figures 2 to 5 The bottom of the battery cell module 10 is provided with a bottom plate 4.

[0065] As a preferred embodiment, the heat-conducting pad 8 of the embodiment comprises an upper heat-conducting pad 801, and side heat-conducting pads 802 formed on both sides of the upper heat-conducting pad 801;

[0066] The upper heat-conducting pad 801 is attached to the upper ends of the first module 1 and the second module 2, and the position where the upper heat-conducting pad 801 cooperates with the transition area of the first module 1 and the second module 2 is formed into a heat-conducting pad overlapping area 803, and the vertical plate heat-conducting pad 502 contacts the heat-conducting pad overlapping area 803.

[0067] The side heat-conducting pads 802 respectively contact the outer sides of the first module 1 and the second module 2.

[0068] The embodiment further limits the structure of the heat-conducting pad 8, which is an integrally formed structure, specifically divided into the upper heat-conducting pad 801 and the side heat-conducting pads 802; the heat-conducting pad 8 is wrapped outside the battery cell module 10, wherein the heat-conducting pad overlapping area 803 formed by the upper heat-conducting pad 801 can adapt to the height difference of the first module 1 and the second module 2 on the one hand, and can contact the vertical plate heat-conducting pad 502 to realize heat conduction on the other hand. The side heat-conducting pads 802 and the box body 11 are provided with heat-conducting glue 16 to conduct heat to the outside of the box body 11 through the heat-conducting glue 16.

[0069] Preferably, the second top plate 201 of the second module 2 of the embodiment is provided with a BMS protection plate 9.

[0070] Preferably, the first module 1 and the second module 2 of the embodiment are respectively provided with a first carrier 701 and a second carrier 702 at the length direction of both ends thereof.

[0071] The first carrier 701 and the second carrier 702 are respectively clamped with the top plate end through the clamping jaw 15.

[0072] Preferably, the first module 1 and the second module 2 of the embodiment are respectively provided with a first carrier 701 and a second carrier 702 at the length direction of both ends thereof.

[0073] The heat generated by the battery cells 3 on both sides of the first module 1 and the second module 2 of the embodiment is respectively transmitted to the outside of the box through the heat transfer path of battery cell 3→ heat-conducting pad 8→ heat-conducting glue 16→ box 11;

[0074] The heat generated by the battery cells 3 in the middle of the first module 1 and the second module 2 of the embodiment is transmitted to the outside of the box through the heat transfer path of battery cell 3→ vertical plate heat-conducting pad 502→ heat-conducting pad overlapping area 803→ heat-conducting pad 8→ heat-conducting glue 16→ box 11.

[0075] The specific assembly process is as follows:

[0076] First, the first module 1 is stacked, the bottom plate 4 is placed first, then the foam 6, the battery cell 3 and the first top plate 101 are placed in sequence, and the battery cell 3 is aligned during the stacking process, then the vertical plate 5 is placed close to the first module 1, and the vertical plate heat conduction pad 502 is tightly attached to the first module 1;

[0077] Second, the second module 2 is stacked, and the stacking method is the same as that of the first module 1, the second module 2 is tightly attached to the vertical plate heat conduction pad 502, then the first carrier 701 and the second carrier 702 are clamped from both ends to the first module 1 and the second module 2, and the clamping is realized through the clamping jaw 15 and the clamping hole 14.

[0078] Third, the heat conduction pad 8 is attached to the combination of the first module 1 and the second module 2, and the BMS protection plate 9 is installed on the second top plate 201, at this time, the BMS protection plate 9 needs to be tightly attached to the heat conduction pad 8;

[0079] Fourth, the assembled battery cell module 10 is loaded into the box body 11, then the heat conduction glue 16 is poured into the heat conduction glue area in the left and right side blocking glue foam 13;

[0080] Fifth, finally, the upper cover 12 is installed.

[0081] In the above technical solution, the soft package battery pack structure provided by the utility model has the following beneficial effects:

[0082] The soft package battery pack structure has two heat dissipation paths, so that the heat generated by the battery cell 3 and the BMS protection plate 9 can be promptly transmitted to the outside of the box body 11, and the temperature of the battery pack is prevented from being too high to cause thermal runaway.

[0083] The above only describes some exemplary embodiments of the utility model in a descriptive manner, without doubt, for ordinary skilled persons in the art, the described embodiments can be modified in various ways without deviating from the spirit and scope of the utility model. Therefore, the above drawings and description are illustrative in nature and should not be understood as limiting the scope of protection of the utility model claims.

Claims

1. A low-speed vehicle pouch battery pack structure, characterized by, The structure comprises: a box body (11); a battery cell module (10) arranged in the box body (11); and an upper cover (12) mounted on an open end of the box body (11); the battery cell module (10) is divided into a first module (1) and a second module (2), and a vertical plate (5) is arranged between the first module (1) and the second module (2), the vertical plate (5) is provided with a vertical plate heat-conducting pad (502), and heat between the first module (1) and the second module (2) is conducted through the vertical plate heat-conducting pad (502); a heat-conducting pad (8) is arranged on the battery cell module (10), the heat-conducting pad (8) contacts top surfaces and side surfaces of the first module (1) and the second module (2); a heat-conducting adhesive (16) is arranged between the heat-conducting pad (8) and the box body (11), heat of the module is conducted to the heat-conducting adhesive (16) through the heat-conducting pad (8) and to the outside of the box body (11).

2. The low-speed vehicle soft-pack battery pack structure according to claim 1, characterized by, the first module (1) and the second module (2) are arranged side by side, and a height of the first module (1) is greater than a height of the second module (2); the battery cell module (10) is provided with a bottom plate (4) at a bottom thereof; the first module (1) comprises a plurality of battery cells (3), and the first module (1) is provided with a first top plate (101) at upper ends of the battery cells (3), and the first top plate (101) is provided with a foam (6) between the first top plate (101) and the battery cells (3); the second module (2) comprises a plurality of battery cells (3), and the second module (2) is provided with a second top plate (201) at upper ends of the battery cells (3), and the second top plate (201) is provided with a foam (6) between the second top plate (201) and the battery cells (3).

3. The low-speed vehicle soft-pack battery pack structure according to claim 2, characterized by, the vertical plate (5) comprises: a vertical plate body (501); and a vertical plate heat-conducting pad (502) arranged on both side surfaces of the vertical plate body (501).

4. The low-speed vehicle soft-pack battery pack structure according to claim 3, characterized by the heat-conducting pad (8) comprises: an upper heat-conducting pad (801); and a side heat-conducting pad (802) formed on both sides of the upper heat-conducting pad (801); the upper heat-conducting pad (801) abuts against upper ends of the first module (1) and the second module (2), and a position where the upper heat-conducting pad (801) cooperates with a transition area of the first module (1) and the second module (2) is formed into a heat-conducting pad overlapping area (803), and the vertical plate heat-conducting pad (502) contacts the heat-conducting pad overlapping area (803); the side heat-conducting pad (802) respectively contacts outer side surfaces of the first module (1) and the second module (2).

5. The low-speed vehicle pouch battery pack structure of claim 4, wherein a BMS protection plate (9) is mounted on the second top plate (201) of the second module (2).

6. The low-speed vehicle soft-pack battery pack structure of claim 3, wherein first and second carriers (701, 702) are respectively mounted at both ends of the first module (1) and the second module (2) in a length direction; the first and second carriers (701, 702) are respectively clamped with end portions of the top plate through clamping claws (15).

7. The low-speed vehicle pouch battery pack structure of claim 4, wherein blocking foam (13) is arranged between the first module (1), the second module (2) and the box body (11).

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