An immersed energy storage battery module and energy storage cabinet

Abstract

The utility model relates to battery technology field discloses a kind of submerged energy storage battery module and energy storage cabinet, including electric core body, temperature control part and fixed assembly;Electric core body includes several independent electric core, several independent electric core keeps flush along the thickness direction of electric core, and the both ends of electric core body are equipped with end plate;Temperature control part includes several foam and heat insulation pad, foam is placed between two adjacent electric cores, and heat insulation pad is placed between the both ends of electric core and end plate;Fixed assembly includes steel hoop band and plastic hoop band, fixed assembly is arranged around the end plate and the electric core body, and is fixed along the thickness direction of electric core.Module is directly soaked in special insulating coolant, and battery module is filled with strip foam between two adjacent electric cores, and the middle cavity between adjacent electric cores is used as coolant flow channel, and heat insulation pad is added at both ends of battery module, and the temperature difference of electric core is controlled within 3 DEG C, to further improve the cycle life of battery module.

Description

Technical Field

[0001] This invention patent belongs to the field of new energy storage, specifically relating to an immersion energy storage liquid-cooled battery module. Background Technology

[0002] Existing energy storage battery module designs generally use air-cooled or liquid-cooled plate devices. Air cooling requires additional equipment such as fans, which takes up a lot of space and generates noise. Liquid-cooled plates require high-precision processes and equipment to manufacture, and the heat dissipation system is relatively complex. Furthermore, the individual cells in the module are prone to large temperature differences, making it difficult to ensure that the cells can be charged and discharged at suitable temperatures in harsh environments, resulting in a decrease in cycle life. Utility Model Content

[0003] The purpose of this invention is to enable the immersion-type liquid-cooled energy storage battery module to balance the temperature difference of the cells during charging and discharging, thereby improving the cycle life of the battery module.

[0004] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0005] An energy storage battery module includes a cell body, a temperature control section, and a fixing assembly. The cell body is composed of several independent cells, which are flush along the thickness direction of the cells, and end plates are provided at both ends of the cells. The temperature control section includes several foams and heat insulation pads, with foams and coolant filling between adjacent cells, and the heat insulation pads filling between the cells at both ends and the end plates. The fixing assembly includes steel bands or plastic bands, which are arranged around the end plates and the cell body and fixed along the thickness direction of the cells.

[0006] Preferably, the foam is a flame-retardant polypropylene microporous foam material. The micropores of the foam absorb the coolant. When the battery cell is working, it expands due to heat, while the foam is compressed, and the module as a whole maintains a good pressure state.

[0007] Optionally, the foam can be rectangular or any irregular shape, and there must be at least two pieces of foam between adjacent cells. There must be cavities between multiple pieces of foam to allow insulating coolant to pass through.

[0008] Preferably, the heat insulation pad is disposed between the outermost end plates at both ends and the battery cell in contact with them. The heat insulation pad is made of porous material, heat reflective material or vacuum material to prevent heat from spreading from the end plates and to keep the battery cell temperature stable.

[0009] The porous material includes foam material and fiber material;

[0010] The heat-reflective material includes gold, silver, nickel, aluminum foil, or metal-plated polyester or polyimide film;

[0011] The vacuum materials include granular core materials, foam core materials, fiber core materials, and composite core materials.

[0012] Preferably, the end plate is a lightweight alloy of aluminum alloy, magnesium alloy or titanium alloy series, formed by extrusion process.

[0013] Preferably, the number of the hoops is at least two, and the hoops are made of steel and plastic.

[0014] Preferably, the top of the battery cell body is provided with a blister tray with a longitudinal opening, through which coolant can flow along the gap between adjacent battery cells to maintain a stable module temperature.

[0015] Preferably, the output electrode base is an insulating plastic part, which is injection molded, and the output electrode base is provided with fixing holes.

[0016] Preferably, the electrodes on the adjacent battery cell bodies are alternately connected by aluminum bars. The aluminum bars are provided with connection holes and positioning holes. The aluminum bars are fixedly connected to the output electrode base through fixing holes. The aluminum bars are positioned on the blister base through positioning holes.

[0017] Preferably, the outer side of the end plate is provided with two symmetrical lifting holes.

[0018] Preferably, the end plate has through holes on both sides, which are unobstructed from top to bottom.

[0019] Preferably, an energy storage cabinet includes an integral structure consisting of a battery cell body 100, a temperature control section 200, and a fixing component 300, as well as a coolant. The coolant immerses all components to form an immersion energy storage battery module and an energy storage cabinet.

[0020] The beneficial effects of this utility model are as follows:

[0021] 1. This utility model adopts a clamp connection form. The whole module is fixed by long through holes on both sides of the end plate and long bolts. It is easy to disassemble and assemble, has a simple structure, and reduces costs.

[0022] 2. This utility model is directly immersed in a special insulating coolant. The heat generated during the charging and discharging of the battery cell is absorbed by the coolant and then enters the external circulation cooling, resulting in very high heat dissipation speed and efficiency. Strip foam is filled between two adjacent battery cells in the battery module, and the cavity in the middle between the cells serves as a coolant flow channel to ensure that coolant passes between every two cells, thereby increasing the heat dissipation area of ​​the battery module. In addition, heat insulation pads are added to both ends of the battery module to balance the temperature difference between the middle cell and the two end cells during the charging and discharging process, keeping the temperature difference within 3°C, and further improving the cycle life of the battery module. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the module body of this utility model;

[0024] Figure 2 This is an assembly drawing of the battery cell and filler of this utility model;

[0025] Figure 3 This is a structural diagram of the end plate of this utility model;

[0026] Figure 4 This is a schematic diagram of the actual blister base of this utility model;

[0027] Figure 5 This is a schematic diagram of the output electrode base structure of this utility model;

[0028] Figure 6 This is a schematic diagram of the aluminum bar structure of this utility model.

[0029] In the figure: 100 battery cell body, 200 temperature control part, 300 fixing component, 1 end plate, 2 output pole base, 21 fixing hole, 3 heat insulation pad, 4 battery cell, 5 foam, 6 blister base, 7 aluminum bar, 8 connecting hole (71), 9 positioning hole (72), 8 steel hoop, 9 plastic hoop, 10 lifting hole, 11 long through hole, 12 opening. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0031] like Figures 1 to 6 As shown, the immersion energy storage battery module of this utility model includes several battery cells 4 arranged in parallel along the thickness direction. Two or more pieces of foam 5 are filled between each two adjacent battery cells 4 in the module and are respectively bonded to both sides of the large surface of the battery cell 4. A central cavity is set between each two adjacent foams to ensure that insulating coolant passes between each two battery cells, thereby increasing the heat dissipation area of ​​the battery module and controlling the temperature difference between different battery cells in the module to within 3°C. Heat insulation pads 3 are set between the outermost end plates 1 at both ends and the battery cells 4 in contact with them to prevent the heat of the battery cells from spreading through the end plates 1 and causing uneven module temperature. The battery cells 4, foam 5, heat insulation pads 3 and end plates 1 are fastened together by several bands to provide appropriate compressive force to the battery module. Two rows of parallel aluminum bars 7 on several battery cells 4 connect the two electrodes of the battery cells 4 in series to form the positive and negative electrodes of the battery module.

[0032] In this embodiment, the rounded corners of the end plate 1 need to be smooth to facilitate the locking of the clamps and improve the overall rigidity of the module. The end plate is provided with long through holes 11 on both sides, which need to be unobstructed and unobstructed to facilitate the use of long bolts to fasten the overall module and further improve the overall stability. The lifting holes 10 facilitate the lifting and transportation of the overall module.

[0033] In this embodiment, the end plate 1 is a lightweight alloy of aluminum alloy, magnesium alloy or titanium alloy series, and is formed by extrusion process.

[0034] In this embodiment, foam 5 is a flame-retardant polypropylene microporous foam material. The battery cell expands due to long-term charging and discharging of the module. The compression of the foam can effectively absorb the expansion, keep the battery cell working under appropriate extrusion pressure, and improve the overall cycle life. The porous structure inside the foam material can absorb coolant and increase the cooling effect.

[0035] In this embodiment, the shape of foam 5 includes a rectangle or any irregular shape, and there are at least two pieces of foam between the cells. There must be a cavity between multiple pieces of foam so that the insulating coolant can pass through.

[0036] In this embodiment, the heat insulation pad 3 can be made of porous material, heat reflective material or vacuum material;

[0037] Porous materials include foam materials and fiber materials;

[0038] Heat-reflective materials include gold, silver, nickel, aluminum foil, or metal-plated polyester or polyimide films;

[0039] Vacuum materials include granular core materials, foam core materials, fiber core materials, and composite core materials.

[0040] In this embodiment, the clamping band includes a steel clamping band 8 or a plastic clamping band 9, which provides appropriate compressive force to the battery module, secures the module as a whole, and improves the cycle life of the energy storage battery module.

[0041] In this embodiment, the aluminum bar 7 is fixedly connected to the output electrode base 2 through the fixing hole 21 and the connecting hole 71, and the aluminum bar 7 is positioned on the blister base 6 through the positioning hole 72.

[0042] In this embodiment, the blister base 6 is disposed on the battery cell body 100, and the blister base 6 is provided with an opening 12 between each adjacent battery cell, through which the coolant between the battery cells can flow from bottom to top.

[0043] In this embodiment, the battery cell body 100, the temperature control part 200 and the fixing component 300 are immersed in coolant to form an immersion energy storage battery module and energy storage cabinet.

[0044] As is known from common technical knowledge, this utility model can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.

Claims

1. An energy storage battery module, characterized in that, It includes a battery cell body (100), a temperature control section (200), and a fixing component (300). The battery cell body (100) includes a plurality of independent battery cells (4), the plurality of independent battery cells (4) are kept flush along the thickness direction of the battery cell, and end plates (1) are provided at both ends of the plurality of battery cells. The temperature control section (200) includes several foams (5) and heat insulation pads (3). The foams (5) are placed between two adjacent battery cells (4), and the heat insulation pads (3) are placed between the battery cells (4) at both ends and the end plates (1). The fixing component (300) includes a steel band (8) or a plastic band (9), and the fixing component is arranged around the end plate (1) and the cell body (100) and fixed along the thickness direction of the cell (4).

2. The energy storage battery module according to claim 1, characterized in that, The foam (5) is a flame-retardant grade polypropylene microporous foam material.

3. The energy storage battery module according to claim 2, characterized in that, The foam (5) is rectangular or any irregular shape, and there are at least two foams (5) between two adjacent cells (4), and there is a cavity between two adjacent foams (5) so that the insulating coolant can pass through.

4. The energy storage battery module according to claim 1, characterized in that, The heat insulation pad (3) is one or more of a porous material, a heat-reflective material, or a vacuum material.

5. The energy storage battery module according to claim 1, characterized in that, The top of the battery cell body (100) is provided with a blister tray (6), and an opening (12) is provided between each adjacent battery cell on the blister tray (6), through which the coolant between the battery cells can flow from bottom to top.

6. The energy storage battery module according to claim 1, characterized in that, The top of the end plate (1) is connected to the output electrode base (2). The output electrode base (2) is an insulating plastic part and is injection molded. The output electrode base (2) is provided with a fixing hole (21).

7. The energy storage battery module according to claim 1, characterized in that, The electrodes on the battery cell body (100) are alternately connected by aluminum bars (7). The aluminum bars (7) are provided with connection holes (71) and positioning holes (72). The aluminum bars (7) and the output electrode base (2) are fixedly connected together by fixing holes (21) and connection holes (71). The aluminum bars (7) are positioned on the blister base (6) by positioning holes (72).

8. The energy storage battery module according to claim 1, characterized in that, The end plate (1) has two symmetrical lifting holes (10) on its outer side.

9. The energy storage battery module according to claim 1, characterized in that, The end plate (1) has long through holes (11) on both sides, and the long through holes (11) are open from top to bottom without obstruction.

10. An energy storage cabinet, characterized in that, The energy storage battery module as described in any one of claims 1-9 includes an energy storage cabinet comprising a cell body (100), a temperature control section (200), and a fixing component (300), as well as a coolant required to immerse the cell body (100), the temperature control section (200), and the fixing component (300).

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