New energy bulk feed truck battery pack

Abstract

The utility model relates to a new energy electric vehicle, and discloses a new energy bulk feed vehicle battery pack, which comprises a battery pack outer shell (1) and a battery PACK (2) arranged in the battery pack outer shell (1), the battery pack outer shell (1) comprises a battery pack frame (101) and a metal plate skin (102) arranged outside the battery pack frame (101), the battery PACK (2) comprises a PACK box body (201) and a battery module arranged in the PACK box body (201), and heat insulation rubber and plastic cotton (3) is arranged between the metal plate skin (102) and the battery pack frame (101) and on the bottom surface of the PACK box body (201). According to the utility model, a double-layer heat insulation measure is adopted for the battery pack, so that the temperature of the battery pack cell can be lower than 55 DEG C in a high-temperature environment, the temperature difference does not exceed 5 DEG C, and the working performance of the battery pack cell is ensured.

Description

Technical Field

[0001] The utility model relates to a new energy electric vehicle, in particular to a battery pack for a new energy bulk feed vehicle. Background Art

[0002] With the increasing popularity and rapid development of electric vehicles, the trend towards electrification is becoming increasingly evident. Electric vehicles include not only passenger cars, but also pure electric commercial vehicles, which are being promoted and used in an orderly manner. Battery packs replace the fuel tanks of fuel vehicles and become the power source of these vehicles.

[0003] Currently, lithium batteries are widely used in electric commercial vehicles. Lithium batteries have relatively high temperature requirements during use. Generally, the high temperature does not exceed 55°C, and the temperature difference does not exceed 5°C. In natural environments, the design of adding a liquid cooling plate to the battery pack can effectively solve this problem. However, during high-temperature disinfection, the liquid cooling machine stops working. How to ensure that the temperature of the battery pack cells does not exceed 55°C and the temperature difference does not exceed 5°C in an artificial high-temperature environment is a technical problem that needs to be solved in this field. Utility Model Content

[0004] The utility model aims to solve the problems existing in the battery packs of electric vehicles in the prior art and provides a battery pack for a new energy bulk feed vehicle.

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0006] A new energy bulk feed truck battery pack includes a battery pack outer shell and a battery PACK arranged inside the battery pack outer shell. The battery pack outer shell includes a battery pack frame and a sheet metal skin arranged outside the battery pack frame. The battery PACK includes a PACK box and a battery module arranged in the PACK box. Insulating rubber and plastic cotton is provided between the sheet metal skin and the battery pack frame and on the bottom of the PACK box.

[0007] Preferably, the sheet metal skin includes a skin base plate fixed to one side of the battery pack frame and a skin cover plate connected to the skin base plate. The skin base plate is constructed in a plate shape, and the skin cover plate is constructed in a shell shape with one end open and connected to the skin base plate. A first sealing gasket is provided at the connection between the skin cover plate and the skin base plate. The provision of the first sealing gasket can ensure the sealing performance of the battery pack connection and ensure a certain degree of sealing inside the battery pack.

[0008] Preferably, the open end of the skin cover is provided with an annular flange, which is connected to the edge of the skin cover by a plurality of evenly spaced bolts, and the sealing gasket is provided with bolt holes for the bolts to pass through. The provision of the annular flange can facilitate the assembly of the sheet metal skin.

[0009] Preferably, the insulating rubber and plastic batts include a base plate insulating rubber and plastic batts disposed between the skin base plate and the battery pack frame, and a cover plate insulating rubber and plastic batts disposed between the inner sidewall of the skin cover plate and the battery pack frame. The base plate insulating rubber and plastic batts are constructed in a plate shape to match the structure of the skin base plate, while the cover plate insulating rubber and plastic batts are constructed in a shell shape to match the structure of the skin cover plate. The shape and structure of the insulating rubber and plastic batts facilitate installation and enhance their thermal insulation effect on the battery pack.

[0010] Preferably, the back of the heat-insulating rubber-plastic cotton is provided with a rubber-plastic cotton adhesive for bonding to the inner surface of the sheet metal skin or the bottom surface of the PACK box, and the front is affixed with a tin foil layer. The provision of the tin foil layer can enhance the heat insulation effect of the heat-insulating rubber-plastic cotton.

[0011] Preferably, a rubber-plastic cotton pressure plate is provided on the front of the insulating rubber-plastic cotton between the sheet metal skin and the battery pack frame. The rubber-plastic cotton pressure plate presses the insulating rubber-plastic cotton against the sheet metal skin via screws. The provision of the rubber-plastic cotton pressure plate can enhance the installation stability of the insulating rubber-plastic cotton on the sheet metal skin.

[0012] Preferably, the skin base plate further includes a battery pack cable hole, where a second sealing gasket is positioned on the front surface of the insulating rubber and plastic wadding. A sealing gasket pressure plate is provided outside the second sealing gasket, which is screwed to press the second sealing gasket against the insulating rubber and plastic wadding. The provision of the second sealing gasket effectively ensures sealing at the battery pack cable hole, and the sealing gasket pressure plate enhances the installation stability of the sealing gasket.

[0013] Preferably, the battery pack wiring holes include communication line holes, power battery positive electrode wire holes, power battery negative electrode wire holes, liquid cooling water pipe inlet holes and liquid cooling water pipe outlet holes, which are arranged in sequence from top to bottom.

[0014] Preferably, the second gasket is formed by splicing two gasket assemblies each having a semicircular notch on one side. The number and size of the semicircular notches correspond to the number and size of the battery pack's cable holes. This splicing of the second gasket assemblies enhances its sealing effect on the cable holes.

[0015] Preferably, the PACK box includes a lower box body and an upper cover plate, the heat-insulating rubber-plastic cotton is arranged on the lower bottom surface of the lower box body, and the outer end surface of the PACK box is provided with high and low pressure connectors, liquid cooling pipe joints and a pressure relief valve.

[0016] The utility model has significant technical effects due to the adoption of the above technical solutions:

[0017] The utility model adopts double-layer heat insulation measures for the battery pack, that is, heat-insulating rubber-plastic cotton is provided between the sheet metal skin and the battery pack frame and on the bottom of the PACK box, so that the temperature of the battery pack cells can be lower than 55°C in a high-temperature environment, and the temperature difference does not exceed 5°C, thereby ensuring the working performance of the battery pack cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the installation structure of the battery pack in Example 1 of the present utility model.

[0019] Figure 2 yes Figure 1 Exploded view of the battery pack.

[0020] Figure 3 yes Figure 2 Schematic diagram of the structure of the battery PACK.

[0021] Figure 4 It is a schematic diagram of the internal structure of the battery pack line hole of the utility model.

[0022] Figure 5 yes Figure 4 sectional view of .

[0023] Figure 6 It is a schematic diagram of the connection structure between the heat-insulating rubber-plastic cotton and the sheet metal skin of the utility model.

[0024] Figure 7 yes Figure 6 sectional view of . DETAILED DESCRIPTION

[0025] The present invention is described in further detail below with reference to the accompanying drawings and embodiments.

[0026] Example 1

[0027] A new energy bulk feed truck battery pack, such as Figures 1-7 As shown, it includes a battery pack outer shell 1 and a battery PACK2 arranged inside the battery pack outer shell 1, the battery pack outer shell 1 includes a battery pack frame 101 and a sheet metal skin 102 arranged outside the battery pack frame 101, the battery PACK2 includes a PACK box 201 and a battery module arranged in the PACK box 201, and heat-insulating rubber-plastic cotton 3 is provided between the sheet metal skin 102 and the battery pack frame 101 and on the bottom surface of the PACK box 201.

[0028] The material of the sheet metal skin 102 in the embodiment is selected from high-quality weather-resistant steel. The sheet metal skin 102 is first cut by laser, then bent, and finally formed by welding. The frame sheet metal skin 102 is protected by three layers of primer, mid-coat and topcoat. The primer can be zinc-rich, the mid-coat can be epoxy, and the topcoat can be fluorocarbon. Of course, other types of coatings that are resistant to high temperature, chemical corrosion and water can also be used. During the spraying process, the sheet metal skin 102 is first sandblasted, the welds are cleaned, and then sprayed. After spraying, the sheet metal skin 102 is internally lined with low-thermal-conductivity rubber and plastic cotton insulation, providing the first layer of protection for the battery cells and ensuring that the temperature does not enter the battery pack during the baking and disinfecting of the new energy bulk feed truck.

[0029] The bottom of the battery PACK2 is also provided with thermal insulation rubber and plastic cotton 3, providing the second layer of protection for the battery cells, so that the entire battery can fully meet the special working conditions of new energy electric vehicles. For example, the vehicle needs to be disinfected after transporting a batch of feed. The disinfection process involves four washings, one misting, and two drying. The feed mill drying center has a temperature of 70°C for more than 40 minutes. The farm drying room uses oil-fired hot air machines, with an average temperature of 70°C in winter, lasting for 60 minutes after reaching the temperature, and an average temperature of 90°C in summer, lasting for 45 minutes. During the disinfection process, aqueous solutions such as glutaraldehyde, potassium persulfate, hypochlorous acid, and calcium chloride are mainly used. By using double-layer thermal insulation measures, i.e., the sheet metal skin 102 and the battery pack frame 101, and the bottom surface of the PACK box 201 are both provided with thermal insulation rubber and plastic cotton 3, the battery cells in the battery pack can have a temperature lower than 55°C and a temperature difference not exceeding 5°C in a high-temperature environment.

[0030] In the embodiment, the thermal conductivity of the rubber and plastic cotton is 0.03-0.045 W / (m·K). It is a commonly used thermal insulation material with B1-level flame retardant performance.

[0031] The PACK box 201 in the embodiment includes a lower box 202 and an upper cover plate 203. The thermal insulation rubber and plastic cotton 3 is arranged at the lower bottom surface of the lower box 202. The PACK box 201 is provided with a high-low pressure connector 204, a liquid cooling pipe joint 205 and a pressure relief valve 206 on the outer end surface, and uses a chemical corrosion-resistant connector. The upper cover plate 203 is made of a high-molecular composite material with a thermal conductivity of 0.1-0.3 W / (m·K), such as a resin glass fiber composite material, so that the battery PACK2 has certain thermal insulation and chemical corrosion resistance.

[0032] In this embodiment, the sheet metal skin 102 includes a skin base plate 103 fixed to one side of the battery pack frame 101 and a skin cover plate 104 connected to the skin base plate 103. The skin base plate 103 is constructed in a plate shape, and the skin cover plate 104 is constructed in a shell shape with one end open and the open end is connected to the skin base plate 103. A first sealing gasket 105 is provided at the connection between the skin cover plate 104 and the skin base plate 103.

[0033] Among them, the thermal insulation rubber and plastic cotton 3 includes a substrate thermal insulation rubber and plastic cotton 302 arranged between the skin substrate 103 and the battery pack frame 101 and a cover plate thermal insulation rubber and plastic cotton 301 arranged between the inner wall of the skin cover plate 104 and the battery pack frame 101. The substrate thermal insulation rubber and plastic cotton 302 is constructed into a plate shape that matches the structure of the skin substrate 103, and the cover plate thermal insulation rubber and plastic cotton 301 is constructed into a shell shape that matches the structure of the skin cover plate 104.

[0034] The skin base plate 103 also has a battery pack cable hole 4, which is also equipped with a second sealing gasket 401, which is arranged on the front of the thermal insulation rubber and plastic cotton 3. A sealing gasket pressure plate 402 is provided outside the second sealing gasket 401. The sealing gasket pressure plate 402 presses the second sealing gasket 401 against the thermal insulation rubber and plastic cotton 3 via screws 305. The battery pack cable hole 4 includes a communication cable hole 403, a power battery positive electrode cable hole 404, a power battery negative electrode cable hole 405, a liquid cooling water pipe inlet hole 406, and a liquid cooling water pipe outlet hole 407, which are arranged in intervals from top to bottom. The provision of the sealing gasket pressure plate 402 ensures that the sealing gasket and rubber and plastic cotton are more stably installed at the battery pack cable hole 4.

[0035] In order to facilitate the installation of the second sealing gasket 401 and ensure the sealing effect of the second sealing gasket 401 on the battery pack pipeline hole 4, the second sealing gasket 401 is cut into two pieces, that is, it is composed of two sealing gasket assemblies 408 with semicircular notches on one side, and the number and size of the semicircular notches are consistent with the number and size of the battery pack pipeline holes 4. After the two sealing gasket assemblies 408 are spliced ​​together, the middle part forms a circular hole for each pipeline hole to pass through. Compared with the method of cutting out corresponding circular holes on the entire sealing gasket, this splicing form can make the sealing gasket fit better to the pipeline hole wall and has a better sealing effect.

[0036] In this embodiment, the first sealing gasket 105 and the second sealing gasket 401 are both soft polytetrafluoroethylene sealing gaskets, so that the various joints of the sheet metal skin 102 are sealed, ensuring the sealing of the battery pack cavity and increasing the heat insulation effect. At the same time, the corrosion of the internal PACK box 201 by the disinfectant is minimized as much as possible, so that the entire battery pack has the characteristics of resistance to chemical corrosion, high temperature resistance and water resistance.

[0037] In order to better realize the assembly of the sheet metal skin 102, an annular flange 106 is provided at the open end of the skin cover 104. The annular flange 106 is connected to the edge of the skin cover 104 through multiple evenly arranged bolts, and the sealing gasket is provided with bolt holes 107 for the bolts to pass through.

[0038] In this embodiment, in order to achieve the heat insulation effect of the heat-insulating rubber-plastic cotton 3, a rubber-plastic cotton adhesive backing is provided on the back of the heat-insulating rubber-plastic cotton 3 for bonding to the inner surface of the sheet metal skin 102 or the bottom surface of the PACK box 201, and a tin foil layer 303 is affixed to the front. The provision of the tin foil layer 303 can further enhance the heat insulation effect of the rubber-plastic cotton and enhance the water resistance of the battery pack.

[0039] A rubber-plastic cotton pressing plate 304 is provided on the front of the insulating rubber-plastic cotton 3 between the sheet metal skin 102 and the battery pack frame 101. The rubber-plastic cotton pressing plate 304 presses the insulating rubber-plastic cotton 3 against the sheet metal skin 102 via screws 305. The provision of the rubber-plastic cotton pressing plate 304 enables the rubber-plastic cotton to be more stably pressed between the sheet metal skin 102 and the battery pack frame 101.

[0040] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application based on one or several embodiments provided in the present application to obtain other embodiments, and these embodiments do not exceed the scope of protection of the present application.

[0041] In short, the above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention patent.

Claims

1. A new energy bulk feed truck battery pack, comprising a battery pack outer shell (1) and a battery PACK (2) disposed inside the battery pack outer shell (1), characterized in that: The battery pack outer shell (1) comprises a battery pack frame (101) and a sheet metal skin (102) arranged outside the battery pack frame (101); the battery PACK (2) comprises a PACK box (201) and a battery module arranged in the PACK box (201); and heat-insulating rubber-plastic cotton (3) is provided between the sheet metal skin (102) and the battery pack frame (101) and on the bottom surface of the PACK box (201).

2. A new energy bulk feed truck battery pack according to claim 1, characterized in that: The sheet metal skin (102) comprises a skin base plate (103) fixed to one side of the battery pack frame (101) and a skin cover plate (104) connected to the skin base plate (103); the skin base plate (103) is constructed in a plate shape; the skin cover plate (104) is constructed in a shell shape with one end open, and the open end is connected to the skin base plate (103); a first sealing gasket (105) is provided at the connection between the skin cover plate (104) and the skin base plate (103).

3. The new energy bulk feed truck battery pack according to claim 2, characterized in that: An annular flange (106) is provided at the open end of the skin cover plate (104), and the annular flange (106) is connected to the edge of the skin cover plate (104) through a plurality of evenly arranged bolts, and a bolt hole (107) for the bolts to pass through is provided on the sealing gasket.

4. The new energy bulk feed truck battery pack according to claim 2, characterized in that: The heat-insulating rubber-plastic cotton (3) comprises a base plate heat-insulating rubber-plastic cotton (302) arranged between the skin base plate (103) and the battery pack frame (101), and a cover plate heat-insulating rubber-plastic cotton (301) arranged between the inner side wall of the skin cover plate (104) and the battery pack frame (101). The base plate heat-insulating rubber-plastic cotton (302) is configured in a plate shape that matches the structure of the skin base plate (103), and the cover plate heat-insulating rubber-plastic cotton (301) is configured in a shell shape that matches the structure of the skin cover plate (104).

5. A new energy bulk feed vehicle battery pack according to claim 2 or 4, characterized in that: The back of the heat-insulating rubber-plastic cotton (3) is provided with a rubber-plastic cotton adhesive for bonding to the inner surface of the sheet metal skin (102) or the bottom surface of the PACK box (201), and the front is affixed with a tin foil layer (303).

6. The new energy bulk feed truck battery pack according to claim 5, characterized in that: A rubber-plastic cotton pressing plate (304) is further provided on the front side of the heat-insulating rubber-plastic cotton (3) between the sheet metal skin (102) and the battery pack frame (101). The rubber-plastic cotton pressing plate (304) presses the heat-insulating rubber-plastic cotton (3) onto the sheet metal skin (102) via screws (305).

7. The new energy bulk feed truck battery pack according to claim 5, characterized in that: A battery pack line hole (4) is also provided on the skin substrate (103), and a second sealing gasket (401) is also provided at the battery pack line hole (4) and arranged on the front side of the heat-insulating rubber-plastic cotton (3). A sealing gasket pressing plate (402) is provided outside the second sealing gasket (401), and the sealing gasket pressing plate (402) presses the second sealing gasket (401) onto the heat-insulating rubber-plastic cotton (3) via screws (305).

8. The new energy bulk feed truck battery pack according to claim 7, characterized in that: The battery pack line holes (4) include a communication line hole (403), a power battery positive electrode line hole (404), a power battery negative electrode line hole (405), a liquid cooling water pipe inlet hole (406), and a liquid cooling water pipe outlet hole (407), which are arranged in sequence from top to bottom.

9. A new energy bulk feed vehicle battery pack according to claim 7 or 8, characterized in that: The second sealing gasket (401) is formed by splicing two sealing gasket components (408) with semicircular notches on one side, and the number and size of the semicircular notches are consistent with the number and size of the battery pack cable holes (4).

10. The new energy bulk feed truck battery pack according to claim 1, characterized in that: The PACK box (201) comprises a lower box (202) and an upper cover (203), the heat-insulating rubber-plastic cotton (3) is arranged on the lower bottom surface of the lower box (202), and the outer end surface of the PACK box (201) is provided with a high-low pressure connector (204), a liquid cooling pipe joint (205), and a pressure relief valve (206).

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