Explosion venting type flange battery box

Abstract

The explosion venting type flange battery box comprises a battery box body and a sealing upper cover, an opening is formed in the top of the battery box body, a flange edge is arranged on the outer wall of the opening side, and the battery box body and the sealing upper cover are detachably connected through the flange edge to form a sealing space used for installing a battery cell. The sealing upper cover is a sealing cover body with elastic deformation capability; a plurality of mounting holes used for being connected with the sealing upper cover are formed in the flange edge, fixing parts are detachably arranged in the mounting holes, a pressure relief interval is arranged between at least two mounting holes and is larger than the interval between the other mounting holes, and when the pressure in the sealing space is larger than the atmospheric pressure borne by the sealing upper cover, the sealing upper cover deforms, and the fixing parts are detachably arranged on the fixing parts. And the pressure relief space is increased to form a pressure relief opening. According to the flange pressure relief principle, the fixed points at equal intervals and pressure relief intervals are arranged differently, generated pressure values are different, the high pressure value positions are always kept sealed, and the low pressure value positions can be used as pressure relief openings and can also be sealed.

Description

Technical Field

[0001] The utility model relates to an explosion-relief flange battery box, belonging to the technical field of battery explosion-relief. Background Art

[0002] Battery grouping and energy storage system integration technology is widely used in various energy storage scenarios such as photovoltaic energy storage, wind power energy storage, grid energy storage, and commercial energy storage due to its wide operating temperature range, good low-temperature performance, good capacity consistency, good charging acceptance and long life.

[0003] The energy storage batteries used in energy storage integration technology are mostly composed of multiple battery cells connected in series and parallel, which will generate heat and exhaust gas. Liquid-cooled batteries for energy storage are often designed to have a sealing level of IP65 (Ingress Protection IP, which is the protection level of the electrical equipment casing against the intrusion of foreign objects) or above. If the large amount of gas accumulated in the battery is not discharged out of the box in a timely manner, the battery may be at risk of explosion or combustion.

[0004] The existing method of venting energy storage batteries is to install an explosion relief valve on the battery wall to release the pressure inside the box to the outside of the box; however, this method takes up space on the battery and increases the cost of each battery, which increases the cost of the entire energy storage system and limits the improvement of the system's energy density. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the existing method of installing explosion relief valves for exhausting energy storage batteries is costly and limits the improvement of the energy density of the system.

[0006] In order to solve the above technical problems, the utility model provides an explosion-proof flange battery box, which can reduce the cost of battery grouping and leave space for the installation of other equipment.

[0007] To achieve the above technical objectives and effects, this application is implemented through the following technical solutions:

[0008] An explosion-venting flange battery box, comprising a battery box body and a sealing upper cover. The battery box body is open at the top and has a flange edge provided on the outer wall of the opening. The battery box body and the sealing upper cover are detachably connected via the flange edge to form a sealed space for installing battery cells. The sealing upper cover is a sealing cover body with elastic deformation capability.

[0009] A plurality of mounting holes for connecting the sealing upper cover are provided on the edge of the flange, and fixing parts are detachably provided in the mounting holes. A pressure relief distance is provided between at least two adjacent mounting holes, and the pressure relief distance is larger than the distance between other adjacent mounting holes. When the pressure in the sealed space is greater than the atmospheric pressure on the sealing upper cover, the sealing upper cover is deformed, and the pressure relief distance expands to form a pressure relief port.

[0010] Preferably, a sealing strip is provided between the flange edge and the sealing upper cover.

[0011] Preferably, the sealing upper cover is in a hat shape, side reinforcing ribs are provided on both sides of the top of the sealing upper cover, and a middle reinforcing rib is provided on the top of the sealing upper cover between the side reinforcing ribs on both sides.

[0012] Preferably, a coolant interface is arranged at each end of the side wall close to the bottom on any side of the battery box body, and the interface ends of the two coolant interfaces are arranged away from each other.

[0013] Furthermore, the battery box body is provided with grounding terminals on the side walls of the interface ends of the two coolant interfaces.

[0014] Furthermore, the battery box body includes a box body and a bottom frame, the box body is hollow and has openings at the bottom and top, the bottom frame is fixed to the bottom of the box body for sealing the bottom of the box body, and the coolant interface is arranged on the bottom frame.

[0015] Furthermore, side brackets are provided on both sides of the bottom frame, the box body is located between the two side brackets, and multiple lifting holes are provided on the sides of the two side brackets facing away from each other. An avoidance groove is provided at one end of the side bracket close to the coolant interface, and a fixing hole for fixing the battery box as a whole is provided on the end face of one end of the side bracket located in the avoidance groove.

[0016] Furthermore, the bottom frame is located on the inner side of the two side brackets and is surrounded by a circle of upper surfaces with side reinforcing bottom beams, a rear reinforcing bottom beam and a front reinforcing bottom beam, and a plurality of intermediate reinforcing beams are provided on the middle upper surface of the bottom frame.

[0017] Preferably, a communication interface is embedded on the side wall of the battery box body, and a maintenance cover is detachably provided on the side wall of the battery box body below the communication interface.

[0018] Preferably, a plurality of DC quick plugs for connecting to battery cells are provided on the side wall of the battery box body, and a maintenance switch for controlling the on and off of the battery cell circuit is provided on the side wall of the battery box body.

[0019] The utility model provides an explosion-proof flange battery box, which has the following advantages:

[0020] When the utility model is used, by utilizing the sealing flange, different arrangements of fixed points with equal spacing and pressure relief spacing are adopted to generate different pressure values, and the lower pressure value is used as the pressure relief port; it can be used as a sealing flange and also as a pressure relief port, and solves the pressure relief problem without the need for an additional explosion relief valve device, and can meet the sealing requirements, thereby reducing the battery assembly cost and leaving space for the installation of other equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an axial side schematic diagram of the overall structure of an explosion-proof flange battery box mainly embodied in the utility model;

[0022] Figure 2 for Figure 1 Enlarged schematic diagram of the middle C part;

[0023] Figure 3 This is a side view of an explosion-proof flange battery box of the utility model;

[0024] Figure 4 This is an axial schematic diagram of the structure of the bottom frame of the present invention;

[0025] In the picture:

[0026] 1-Battery box body; 11-Box body; 12-Bottom frame; 2-Sealing cover; 21-Flange edge; 211-Mounting hole; 22-Side reinforcement rib; 23-Middle reinforcement rib; 3-Fixer; 4-Sealing strip; 5-Coolant interface; 6-Grounding terminal; 7-Communication interface; 8-Maintenance cover; 9-Maintenance switch; 10-DC quick plug; 13-Side bracket; 131-Lifting hole; 132-Avoidance groove; 133-Fixing hole; 14-Side reinforcement bottom beam; 15-Rear reinforcement bottom beam; 16-Front reinforcement bottom beam; 17-Middle reinforcement beam. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this utility model, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technical personnel in this field without making creative efforts are within the scope of protection of this utility model.

[0028] Reference Figure 1-Figure 3 , a explosion-proof flange battery box, including a battery box body 1 and a sealing cover 2, the battery box body 1 is surrounded by sheet metal structural members, flow channels or plates of other materials, the top of the battery box body 1 is open and a flange edge 21 is integrally formed on the outer wall of the opening side, the flange edge 21 of the battery box body 1 and the sealing cover 2 are fixedly connected with multiple fixing members 3 by bolts to achieve a sealing and fixing effect, thereby forming a sealed space for installing battery cells, and the sealing cover 2 is a sealing cover body with elastic deformation ability. In a feasible embodiment, the battery box body 1 and the sealing cover 2 can be structural members of any shape suitable for the battery cell. In this embodiment, the battery box body 1 and the sealing cover 2 are both rectangular structural members, and the sealing cover 2 is preferably made of shape memory alloy.

[0029] Furthermore, a plurality of mounting holes 211 for connecting the sealing upper cover 2 are provided on the flange edge 21, and the mounting holes 211 are threaded holes compatible with the fixing members 3. The sealing upper cover 2 is provided with connecting holes compatible with the mounting holes 211, wherein a pressure relief spacing is provided between at least two adjacent mounting holes 211, and the pressure relief spacing is set to B and is greater than the spacing between other adjacent mounting holes 211. Preferably, except for the two adjacent mounting holes 211 with the pressure relief spacing, the remaining adjacent mounting holes 211 are set at equal spacings, and the equal spacing is set to A. When the pressure in the sealed space is greater than the atmospheric pressure on the sealing upper cover 2, the sealing upper cover 2 is deformed, and the pressure relief spacing expands to form a pressure relief port, thereby releasing excess pressure in the sealing box.

[0030] Furthermore, a sealing strip 4 is installed between the flange edge 21 and the sealing upper cover 2. The sealing strip 4 is made of an elastic and compressible sealing material and is used to seal the sealing upper cover 2 and the battery box body 1. During installation, the formed sealing strip 4 is first placed on the battery box body 1, and then the sealing upper cover 2 is pressed onto the sealing strip 4, aligning all the hole positions. Finally, the bolt fasteners 3 are used to connect the sealing upper cover 2 and the battery box body 1 together through a certain clamping force, wherein the clamping force at the equal interval A is set to F1, and the clamping force at the pressure relief interval B is set to F2. The clamping force F1 needs to ensure that the sealing upper cover 2 and the battery box body 1 are always in a sealed state within the range of the equal interval A, and the clamping force F2 needs to ensure the sealing of the sealing upper cover 2 and the battery box body 1 under normal atmospheric pressure. In this embodiment, the calculation of the clamping force is a prior art and will not be elaborated on.

[0031] Reference Figure 1 In a further embodiment, the sealing upper cover 2 is in a hat shape, and side reinforcing ribs 22 are provided on both sides of the long side of the top of the sealing upper cover 2. The side reinforcing ribs 22 are stamped and concave inward, which helps to ensure the strength of the long side direction of the sealing upper cover 2. The top of the sealing upper cover 2 is stamped with a middle reinforcing rib 23 located between the side reinforcing ribs 22 on both sides, which helps to ensure the strength of the short side direction of the sealing upper cover 2.

[0032] Reference Figure 1 and Figure 3In a further embodiment, a coolant interface 5 is arranged at each end of the side wall near the bottom on either side of the battery box body 1, and the interface ends of the two coolant interfaces 5 are set away from each other, serving as the water inlet and outlet of the product thermal management; the battery box body 1 is provided with grounding terminals 6 on the interface end side walls of the two coolant interfaces 5 to ensure the electrical safety of the product; the battery box body 1 is embedded with a communication interface 7 on the upper left corner side wall of the coolant interface 5, which can be used for communication between the product and the outside world. The installation position adopts a groove structure so that the communication structure will not protrude from the product. A maintenance cover 8 is fixed with bolts on the side wall of the battery box body 1 below the communication interface 7. When the product fails and internal components need to be repaired, the operation can be performed by disassembling the maintenance cover.

[0033] Furthermore, a plurality of DC quick plugs 10 for connecting to battery cells are installed on the rightmost side wall of the battery box body 1 on the side of the coolant interface 5. The multiple DC quick plugs 10 are arranged in an upper and lower position and serve as charging and discharging ports for electric energy; a maintenance switch 9 for controlling the on and off of the battery cell circuit is installed on the middle side wall of the battery box body 1 on the side of the coolant interface 5. When wiring or maintenance is required, the maintenance switch 9 is first disconnected to ensure electrical safety. The installation position is a groove so as not to protrude from the battery box. In this embodiment, the use of the DC quick plug 10 and the maintenance switch 9 and the electrical connection and installation with the battery cell are all existing technologies and will not be described in detail.

[0034] Reference Figure 1 and Figure 4 In a further embodiment, the battery box body 1 includes a box body 11 and a bottom frame 12. The box body 11 is hollow and has openings at the bottom and top. The bottom frame 12 is welded and fixed to the bottom of the box body 11 for sealing the bottom of the box body 11 and serves as a base for product transportation and installation. The coolant interface 5 is installed on the bottom frame 12.

[0035] Furthermore, side brackets 13 are provided on both sides of the bottom frame 12. The bottom frame 12 and the side brackets 13 are made of rectangular tubes or sheet metal. During installation, the box body 11 is placed between the two side brackets 13. A plurality of lifting holes 131 are provided on the sides of the two side brackets 13 facing away from each other for lifting and transporting the product. An avoidance groove 132 is formed at one end of the side bracket 13 close to the coolant interface 5 to facilitate avoiding the coolant delivery pipe connected to the coolant interface 5 for delivering coolant. A fixing hole 133 for fixing the battery box as a whole is provided on the end face of one end of the side bracket 13 located at the avoidance groove 132 for installing and fixing the entire product.

[0036] Furthermore, the bottom frame 12 is located on the upper surface of a circle inside the two side brackets 13 and is surrounded by side reinforcing bottom beams 14, a rear reinforcing bottom beam 15 and a front reinforcing bottom beam 16. The side reinforcing bottom beams 14, the rear reinforcing bottom beam 15 and the front reinforcing bottom beam 16 are made of rectangular tubes or sheet metal bending to strengthen the structural strength of the bottom frame 12. A plurality of intermediate reinforcing beams 17 are provided on the upper surface of the middle part of the bottom frame 12 to further strengthen the strength of the bottom frame 12. The intermediate reinforcing beams 17 are reinforced with concave and convex grooves in both positive and negative directions. In this embodiment, the side reinforcing bottom beams 14, the rear reinforcing bottom beam 15, the front reinforcing bottom beam 16 and the intermediate reinforcing beams 17 are all welded and fixed to the bottom frame 12.

[0037] The working principle of the explosion-proof flange battery box of the utility model is as follows:

[0038] When the battery box is placed in the battery cell and installed, the atmospheric pressure outside the battery box body 1 is set to P0, the pressure inside the battery box body 1 is set to P1, and the maximum stress that the sealing cover 2 can withstand is set to P3;

[0039] When the pressure P1 inside the box is equal to the pressure P0 outside the box, the clamping force F1 and the clamping force F2 can both meet the compression and sealing requirements of the upper cover and the bottom plate, that is, there will be no pressure released outward in the equal spacing A and the pressure relief area B; when the battery cells in the box are exhausted or the temperature rises, the internal air expands, the pressure P1 inside the box is greater than the pressure P0 outside the box and less than P3, the clamping force F1 meets the sealing requirement, and the clamping force F2 cannot meet the sealing requirement; the equal spacing A area will not release pressure outward to maintain the seal, and the pressure relief spacing B area, the sealed upper cover 2 elastically deforms in the pressure relief spacing B area due to the pressure inside the box to form a pressure relief port, releasing excess pressure in the box. As the pressure inside and outside the box slowly balances, the deformation of the sealed upper cover 2 in the pressure relief spacing B area slowly recovers until it is sealed and the pressure relief is completed.

[0040] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form or substance. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the present invention, and these improvements and supplements should also be considered as the scope of protection of the present invention. Any technician familiar with this profession can make some changes, modifications and equivalent changes made by using the technical content disclosed above without departing from the spirit and scope of the present invention, which are all equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An explosion-proof flange battery box, characterized in that: The battery box body (1) comprises a battery box body (1) and a sealing upper cover (2), wherein the battery box body (1) is open at the top and a flange edge (21) is provided on the outer wall of the opening side, and the battery box body (1) and the sealing upper cover (2) are detachably connected via the flange edge (21) to form a sealed space for installing battery cells, and the sealing upper cover (2) is a sealing cover body with elastic deformation capability; A plurality of mounting holes (211) for connecting the sealing upper cover (2) are provided on the flange edge (21), and fixing members (3) are detachably provided in the mounting holes (211), wherein a pressure relief distance is provided between at least two adjacent mounting holes (211), and the pressure relief distance is larger than the distance between other adjacent mounting holes (211). When the pressure in the sealed space is larger than the atmospheric pressure on the sealing upper cover (2), the sealing upper cover (2) is deformed, and the pressure relief distance expands to form a pressure relief port.

2. The explosion-proof flange battery box according to claim 1, characterized in that: A sealing strip (4) is provided between the flange edge (21) and the sealing upper cover (2).

3. The explosion-proof flange battery box according to claim 1, characterized in that: The sealing upper cover (2) is in a hat shape, and side reinforcing ribs (22) are provided on both sides of the top of the sealing upper cover (2). An intermediate reinforcing rib (23) is provided on the top of the sealing upper cover (2) between the side reinforcing ribs (22) on both sides.

4. The explosion-proof flange battery box according to claim 1, characterized in that: A coolant interface (5) is arranged at each end of the side wall near the bottom on either side of the battery box body (1), and the interface ends of the two coolant interfaces (5) are arranged away from each other.

5. The explosion-proof flange battery box according to claim 4, characterized in that: The battery box body (1) is provided with grounding terminals (6) on the side walls of the interface ends of the two cooling liquid interfaces (5).

6. The explosion-proof flange battery box according to claim 4, characterized in that: The battery box body (1) comprises a box body (11) and a bottom frame (12); the box body (11) is hollow and has openings at the bottom and top; the bottom frame (12) is fixed to the bottom of the box body (11) for sealing the bottom of the box body (11); and the coolant interface (5) is arranged on the bottom frame (12).

7. The explosion-proof flange battery box according to claim 6, characterized in that: Side brackets (13) are provided on both sides of the bottom frame (12), the box body (11) is located between the two side brackets (13), and a plurality of lifting holes (131) are provided on the sides of the two side brackets (13) facing away from each other. An avoidance groove (132) is provided at one end of the side bracket (13) close to the coolant interface (5), and a fixing hole (133) for fixing the battery box as a whole is provided on an end surface of the side bracket (13) located at the avoidance groove (132).

8. The explosion-proof flange battery box according to claim 7, characterized in that: The bottom frame (12) is located on an inner side of the two side brackets (13) and is surrounded by a side reinforcing bottom beam (14), a rear reinforcing bottom beam (15) and a front reinforcing bottom beam (16). A plurality of intermediate reinforcing beams (17) are provided on the middle upper surface of the bottom frame (12).

9. The explosion-proof flange battery box according to claim 1, characterized in that: A communication interface (7) is embedded on the side wall of the battery box body (1), and a maintenance cover (8) is detachably provided on the side wall of the battery box body (1) below the communication interface (7).

10. The explosion-proof flange battery box according to claim 1, characterized in that: A plurality of DC quick plugs (10) for connecting to battery cells are provided on the side wall of the battery box body (1), and a maintenance switch (9) for controlling the on / off of the battery cell circuit is provided on the side wall of the battery box body (1).

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