Double-layer structure battery pack built by multiple battery cell assemblies

Abstract

The utility model relates to the technical field of ship battery packs, and discloses a double-layer structure battery pack built by a plurality of battery cell components, which comprises a battery box body and a lower-layer battery cell component, the bottom of the battery box body is fixedly connected with a battery cell supporting cross beam, the lower-layer battery cell component is fixedly connected onto the battery cell supporting cross beam through bolts, and the battery cell supporting cross beam is fixedly connected with the battery box body through bolts. An isolation plate supporting block is arranged between the lower-layer battery cell assemblies, the isolation plate supporting block is used for supporting an upper-layer battery cell placement isolation plate, the two lower-layer battery cell assemblies are electrically connected in series through an electric wire, and a plurality of battery cell supporting frames are arranged in the battery box body. According to the utility model, the battery pack with high integration is split into a plurality of standardized battery cell small modules, so that the assembly, disassembly and maintenance efficiency of the battery pack is improved, the overall usability of the battery pack is improved, the service life of the battery pack is prolonged, and the problems that the traditional battery pack is very difficult to maintain and can only be scrapped after being broken down are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of ship battery packs, and in particular to a double-layer structure battery pack constructed by multiple battery core components. Background Art

[0002] Against the backdrop of the gradual popularization of new energy, the marine industry has also ushered in a revolution in the application of battery packs. As a key component of the ship's power system, the ship's battery pack provides important energy support for the operation of the ship. It is usually composed of multiple battery cell components, which are carefully designed and combined to achieve specific power storage and output functions.

[0003] With the continuous development of technology, the degree of integration of battery packs is increasing, aiming to improve energy density, optimize space utilization and enhance overall performance. Existing new energy lightweight battery packs connect multiple groups of battery cells in series to form standardized small modules, which are then fixed on the battery box.

[0004] However, this also brings some problems. The structural design of the existing battery pack makes the modules non-detachable. Once the battery pack fails, it is often difficult for maintenance personnel to carry out targeted repairs or replacements on a single module, resulting in poor overall maintainability of the battery pack. The structural adhesive bonding parts can no longer be removed. Most of them are scrapped after a failure, resulting in a serious waste of resources. Therefore, how to optimize the battery pack structure so that the battery pack can be easily installed and maintained is of great significance. To this end, those skilled in the art have proposed a double-layer structure battery pack constructed of multiple battery cell components to solve the above problems. Utility Model Content

[0005] In order to make up for the above shortcomings, the present invention provides a double-layer structure battery pack constructed by multiple battery cell components, aiming to improve the problem that the high-energy integrated battery pack structure composed of multiple groups of battery cells in the existing technology is difficult to disassemble and maintain.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a double-layer structure battery pack constructed by multiple battery cell assemblies, including a battery box and a lower battery cell assembly, the bottom of the battery box is fixedly connected to a battery cell support beam, the lower battery cell assembly is fixedly connected to the battery cell support beam by bolts, an isolation plate support block is arranged between the lower battery cell assemblies, the isolation plate support block is used to support the upper battery cell to place an isolation plate, the two lower battery cell assemblies are electrically connected in series through wires, a plurality of battery cell support frames are arranged inside the battery box, and the plurality of battery cell support frames are welded to the middle position of the battery box through a through-plate, a battery cell isolation plate assembly is placed on the battery cell support frame, and two groups of upper battery cell assemblies are fixedly connected to the battery cell isolation plate assembly by bolts, and the two groups of upper battery cells are connected to the upper battery cell assembly by a through-plate. A bracket assembly is provided above the component, and a BMS protection board is fixedly connected to the bracket assembly by a screw. One end of the upper battery cell assembly is electrically connected to the lower battery cell assembly through a wire, and the other end is plugged into the BMS protection board through a wire port. A sealing foam and an upper cover are provided above the BMS protection board. A positive connection quick plug and a negative connection quick plug are provided on one side of the battery box in sequence. The total positive position of the upper battery cell assembly and the positive connection quick plug are plugged into the wire port, and the BMS protection board and the negative connection quick plug are plugged into the wire port. A reset switch and an aviation plug are provided on one side of the battery box. The reset switch and the aviation plug are respectively connected to the BMS protection board through wires. An explosion-proof valve is provided on the battery box, and the explosion-proof valve is used to balance the internal and external pressure differences.

[0007] Furthermore, a circular hole is opened in the middle of the battery cell support frame, and nuts are pressed and riveted around the circular hole. A battery cell support beam is provided on the inner side of the bottom of the battery box body, and a circular hole is opened in the middle of the battery cell support beam, and nuts are pressed and riveted around the circular hole.

[0008] Furthermore, the lower-layer battery cell assembly includes multiple battery cell bodies, and the multiple battery cell bodies are connected back to back through connecting plates. Aerogel is arranged in the middle of the battery cell body, and the aerogel is used for fire prevention and heat insulation. Short-side epoxy boards are arranged at both ends of the lower-layer battery cell assembly, and battery end plates are arranged on the outside of the short-side epoxy boards. Long-side epoxy boards are arranged on both sides of the lower-layer battery cell assembly, and two-side fixing brackets are arranged on the outside of the long-side epoxy boards. The two-side fixing brackets are fixed to the battery end plates by three screws, and buffer foam is arranged at the bottom of the lower-layer battery cell assembly.

[0009] Furthermore, the cell isolation plate assembly includes a cell isolation plate body, a reinforcing plate welded on the back of the cell isolation plate body, a cell support block welded on the front of the cell isolation plate body, a plurality of circular holes are opened on the cell support block, and M8 nuts are riveted around the circular holes, and a plurality of circular holes are opened on the cell isolation plate body, and M4 nuts are riveted around the circular holes.

[0010] Furthermore, a plurality of circular holes are provided in the middle of the bracket assembly, and riveted nuts are press-fitted around the circular holes.

[0011] Furthermore, a sealing foam is attached to the surface of the battery box, and an upper cover is provided on the sealing foam, which is integrally locked and sealed by screw two.

[0012] Furthermore, corner reinforcement rib 1, corner reinforcement rib 2, and corner reinforcement rib 3 are provided on the outer side of the bottom of the battery box, and fixing blocks are welded on the corner reinforcement rib 1, corner reinforcement rib 2, and corner reinforcement rib 3.

[0013] Furthermore, the top of the battery box is provided with a flange shape and a plurality of circular holes, and riveted nuts are pressed around the circular holes.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the present invention, by splitting the highly integrated battery pack into multiple standardized battery cell modules, the standardized small modules can be flexibly placed in the battery box, thereby improving the efficiency of battery pack assembly, disassembly and maintenance, and improving the overall availability and service life of the battery pack, thereby ensuring the normal operation time and operational efficiency of the ship, and solving the problem that traditional battery packs are extremely difficult to repair after failure and can only be scrapped.

[0016] 2. In the present invention, multiple cell support frames are welded through the plate in the middle of the battery box, and cell isolation plate assemblies are placed on the cell support frames to isolate two independent spaces. Standardized cell modules are staggered, so that the structural strength of the battery pack is reliable, the series and parallel connection of the cell modules is convenient, the overall battery pack is low-cost and miniaturized, and the service life of the battery pack is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional diagram of a double-layer structure battery pack constructed by multiple battery core components proposed in the present invention;

[0018] Figure 2 This is a battery box structure diagram of a double-layer battery pack constructed by multiple battery core components proposed in the present invention;

[0019] Figure 3This is a schematic diagram of the structure of a cell isolation plate assembly of a double-layer structure battery pack constructed by multiple cell assemblies proposed in the present invention;

[0020] Figure 4 This is a schematic diagram of the cell structure of a double-layer battery pack constructed from multiple cell components proposed in the present invention.

[0021] Legend:

[0022] 1. Battery box; 2. Positive terminal quick connector; 3. Negative terminal quick connector; 4. Reset switch; 5. Lower cell assembly; 6. Wire; 7. Bolt; 8. Isolation plate support block; 9. Screw 1; 10. Cell isolation plate assembly; 11. Upper cell assembly; 12. Sealing foam; 13. Bracket assembly; 14. BMS protection board; 15. Upper cover; 16. Screw 2; 17. Wire; 18. Explosion-proof valve; 19. Aviation plug; 201. Cell support frame; 202. Cell support beam; 203. Corner reinforcement rib one; 204, corner reinforcement rib two; 205, corner reinforcement rib three; 206, fixing block; 207, nut; 301, battery cell body; 302, connecting piece; 303, aerogel; 304, short side epoxy board; 305, battery cell end plate; 306, long side epoxy board; 307, two side fixing brackets; 308, screw three; 309, buffer foam; 401, battery cell isolation board body; 402, reinforcement plate; 403, battery cell support block; 404, M8 nut; 405, M4 nut. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Reference Figure 1 and Figure 2, the utility model provides an embodiment: a double-layer structure battery pack built by multiple battery cell assemblies, including a battery box 1 and a lower battery cell assembly 5, the bottom of the battery box 1 is fixedly connected to a battery cell support beam 202, the lower battery cell assembly 5 is fixedly connected to the battery cell support beam 202 by bolts 7, and an isolation plate support block 8 is arranged between the lower battery cell assemblies 5, the isolation plate support block 8 is used to support the upper battery cell to place the isolation plate, and the two lower battery cell assemblies 5 are electrically connected in series through wires 6, a plurality of battery cell support frames 201 are arranged inside the battery box 1, and the plurality of battery cell support frames 201 are welded to the middle position of the battery box 1 by through-plate welding, a battery cell isolation plate assembly 10 is placed on the battery cell support frame 201, two groups of upper battery cell assemblies 11 are fixedly connected to the battery cell isolation plate assembly 10 by bolts 7, a bracket assembly 13 is arranged above the two groups of upper battery cell assemblies 11, and the bracket assembly 13 is screwed 9 A BMS protection board 14 is fixedly connected, one end of the upper battery cell assembly 11 is electrically connected to the lower battery cell assembly 5 through a wire 17, and the other end is plugged into the BMS protection board 14 through the wire 6 port. A sealing foam 12 and an upper cover 15 are provided above the BMS protection board 14. A positive connection quick plug 2 and a negative connection quick plug 3 are provided on one side of the battery box 1 in sequence. The total positive position of the upper battery cell assembly 11 and the positive connection quick plug 2 are plugged into the wire 6 port, and the BMS protection board 14 and the negative connection quick plug 3 are plugged into the wire 6 port. A reset switch 4 and an aviation plug 19 are provided on one side of the battery box 1. The reset switch 4 and the aviation plug 19 are respectively connected to the BMS protection board 14 through the wire 6. An explosion-proof valve 18 is provided on the battery box 1. The explosion-proof valve 18 is used to prevent the internal air pressure from being too high and to balance the internal and external pressure differences. A circular hole is opened in the middle of the battery cell support frame 201, and a rivet nut 207 is pressed around the circular hole.

[0025] Reference Figure 2 , a cell support beam 202 is provided on the inner side of the bottom of the battery box 1, a circular hole is provided in the middle of the cell support beam 202, and a rivet nut 207 is pressed around the circular hole, a plurality of circular holes are provided in the middle of the bracket assembly 13, and rivet nuts 207 are pressed around the circular holes, a sealing foam 12 is affixed to the surface of the battery box 1, and an upper cover 15 is provided on the sealing foam 12, which is locked and sealed as a whole by screws 16, a corner reinforcement rib 1 203, a corner reinforcement rib 204, and a corner reinforcement rib 3 205 are provided on the outer side of the bottom of the battery box 1, and the setting of the corner reinforcement ribs can effectively improve the strength and rigidity of the battery box 1 at the corners, and a fixing block 206 is welded on the corner reinforcement rib 1 203, the corner reinforcement rib 204 and the corner reinforcement rib 3 205. A flanging shape is provided on the top of the battery box 1 and a plurality of circular holes are provided, and rivet nuts 207 are pressed around the circular holes.

[0026] Specifically, the battery case 1 serves as the outer shell of the entire battery pack, providing space for installation and protection of the internal battery cell assemblies and other components. The battery cell support crossbeam 202 is fixed in the battery case 1, and can be used to support the battery cell isolation plate assembly 10 and place the upper battery cell. The two lower battery cell assemblies 5 are electrically connected in series through the wire 6, and are connected to the upper battery cell assembly 11 through the wire 17, together forming the battery pack's electric energy storage system. Through reasonable layout and connection, efficient electric energy output is achieved. The battery cell isolation plate assembly 10 can isolate the upper and lower battery cells and provide support for the upper battery cell. The bracket assembly 13 is fixed on the battery cell isolation plate assembly 10, provides installation support for the BMS protection board 14, and plays a certain role in fixing and protecting the upper battery cell assembly 11, sealing the bubble. The cotton 12 can cooperate with the upper cover 15 to seal the battery box 1, prevent external impurities from entering the battery box 1, maintain a clean and dry environment inside the battery pack, and reduce the impact of external vibrations on the internal components of the battery box 1. The positive pole connection quick plug 2 and the negative pole connection quick plug 3 are used to connect the positive and negative poles of the battery pack, respectively, to achieve quick connection with external electrical equipment or charging equipment. The BMS protection board 14 can monitor and manage the charging and discharging process of the battery pack to protect the battery from damage due to abnormal conditions such as overcharging, over-discharging, and overcurrent. The reset switch 4 is used to reset the system after the BMS protection board 14 triggers the protection action. The aviation plug 19 is used to connect other specific devices or sensors to achieve data transmission or function expansion, thereby improving the intelligent management level of the battery pack.

[0027] Reference Figure 4 The lower battery cell assembly 5 includes multiple battery cell bodies 301, which are connected back to back through connecting pieces 302. Aerogel 303 is arranged in the middle of the battery cell body 301, and the aerogel 303 is used for fire prevention and heat insulation. Short-side epoxy plates 304 are arranged at both ends of the lower battery cell assembly 5, and battery end plates 305 are arranged on the outside of the short-side epoxy plates 304. Long-side epoxy plates 306 are arranged on both sides of the lower battery cell assembly 5, and two-side fixing brackets 307 are arranged on the outside of the long-side epoxy plates 306. The two-side fixing brackets 307 are fixed to the battery end plates 305 by screws 308. Buffer foam 309 is arranged at the bottom of the lower battery cell assembly 5.

[0028] Specifically, multiple battery cell bodies 301 are connected back to back through connecting plates 302. This connection method makes the electrical connection between the battery cells tighter and more reliable, and can effectively transmit electrical energy. The setting of the aerogel 303 has the functions of fire prevention and heat insulation. When an abnormal situation occurs in the battery pack, it can prevent the spread of fire and protect the safety of other battery cells and the battery pack as a whole. The short-side epoxy plate 304, the long-side epoxy plate 306 and the fixing brackets 307 on both sides provide all-round protection and fixation for the battery cell body 301 to prevent the battery cell from being damaged or deformed when subjected to external force. The buffer foam 309 at the bottom can play a role in buffering and shock absorption, reducing the impact of ship vibration on the battery cell, and further protecting the safety and performance of the battery cell.

[0029] Reference Figure 3 The cell isolation plate assembly 10 includes a cell isolation plate body 401, a reinforcing plate 402 is welded on the back of the cell isolation plate body 401, a cell support block 403 is welded on the front of the cell isolation plate body 401, a plurality of circular holes are opened on the cell support block 403, and M8 nuts 404 are riveted around the circular holes, and a plurality of circular holes are opened on the cell isolation plate body 401, and M4 nuts 405 are riveted around the circular holes.

[0030] Specifically, the reinforcing plate 402 on the back of the battery cell isolation plate body 401 enhances the overall strength of the isolation plate, enabling it to withstand the weight of the upper battery cell and possible external forces, and is not easily deformed or damaged. The battery cell support block 403 welded on the front is provided with a circular hole and riveted with an M8 nut 404, which facilitates the fixed installation of the upper battery cell assembly 11 and improves the installation accuracy and stability. The circular hole and riveted M4 nut 405 on the battery cell isolation plate body 401 are used for connection or auxiliary fixation with other components, further enhancing the integrity and reliability of the entire battery pack structure.

[0031] Working principle: In this battery pack, the battery cell body 301 adopts lithium iron phosphate, which solves the problem of large volume and heavy weight of the lead-acid battery pack. The battery cell bodies 301 are assembled back to back in sequence and connected in series through connecting plates 302. Aerogel 303 is arranged in the middle for fire prevention and heat insulation. Short-side epoxy plates 304 are arranged at both ends of the battery cell, and battery cell end plates 305 are arranged on the outside. Long-side epoxy plates 306 are arranged on both sides of the battery cell, and fixed brackets 307 on both sides of the battery cell are arranged on the outside. The brackets on both sides of the battery cell are a top-bent structure with holes at both ends. The top bending position is pressed on the top surface of the battery cell, and the opening positions at both ends are fixed to the battery cell end plates 305 by screws 308 to form a standardized battery module.

[0032] Two groups of lower layer battery cell assemblies 5 are fixed on the battery cell support crossbeam 202 at the bottom of the inner side of the battery box 1 by bolts 7. The two groups of lower layer battery cell assemblies 5 are connected in series by wires 6, and a battery cell support frame 201 is placed between the two groups of lower layer battery cells, which are fixed to the fixed brackets 307 on both sides of the battery cells by screws 308. A plurality of battery cell support frames 201 are welded on the middle plate of the battery box 1, and the battery cell isolation plate assembly 10 is fixed to the battery cell support frame 201 by screws 9. The two groups of upper layer battery cell assemblies 11 are fixed to the battery cell isolation plate assembly 10 by bolts 7. The lower layer The battery cell assembly 5 and the upper battery cell assembly 11 are connected in series through a wire 17. The bracket assembly 13 is fixed on the battery cell isolation plate assembly 10, and a BMS protection board 14 is placed on its upper end. The total negative pole of the upper battery cell is connected to the BMS protection board 14 through a power line, and the other end is connected to the negative pole connection quick plug 3. The total positive pole of the upper battery cell is connected to the positive pole connection quick plug 2 through a power line. A sealing foam 12 is provided at the upper end of the battery box 1, and an upper cover 15 is provided at the upper end of the sealing foam 12, and the whole is locked and sealed by screws 16, thereby forming a complete ship battery pack.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A double-layer battery pack constructed from a plurality of battery cell assemblies, comprising a battery case (1) and a lower layer battery cell assembly (5), characterized in that: The bottom of the battery box (1) is fixedly connected to a cell support beam (202), the lower cell assembly (5) is fixedly connected to the cell support beam (202) by means of bolts (7), an isolation plate support block (8) is provided between the lower cell assemblies (5), the isolation plate support block (8) is used to support the upper cell to place the isolation plate, the two lower cell assemblies (5) are electrically connected in series by means of wires (6), and a plurality of cells are provided inside the battery box (1). A support frame (201), wherein a plurality of cell support frames (201) are welded to the middle position of the battery box (1) through a through-plate, a cell isolation plate assembly (10) is placed on the cell support frame (201), two groups of upper cell assemblies (11) are fixedly connected to the cell isolation plate assembly (10) by bolts (7), a support assembly (13) is provided above the two groups of upper cell assemblies (11), and a BMS protection assembly (13) is fixedly connected to the support assembly (13) by screws (9). The upper battery cell assembly (11) is electrically connected to the lower battery cell assembly (5) at one end through a wire (17), and the other end is plugged into the BMS protection board (14) through a wire (6) port. A sealing foam (12) and an upper cover (15) are provided above the BMS protection board (14). A positive electrode connection quick plug (2) and a negative electrode connection quick plug (3) are provided on one side of the battery box (1). The upper battery cell assembly (11) is always in the positive position and the positive electrode connection quick plug (2) are connected to the lower battery cell assembly (5) at the other end. The plug (2) is plugged in through the port of the wire (6), the BMS protection board (14) and the negative electrode quick connection plug (3) are plugged in through the port of the wire (6), a reset switch (4) and an aviation plug (19) are provided on one side of the battery box (1), the reset switch (4) and the aviation plug (19) are respectively connected to the BMS protection board (14) through the wire (6), and an explosion-proof valve (18) is provided on the battery box (1), and the explosion-proof valve (18) is used to balance the internal and external pressure differences.

2. A double-layer structure battery pack constructed of multiple battery cell components according to claim 1, characterized in that: A circular hole is provided in the middle of the battery cell support frame (201), and a rivet nut (207) is press-fitted around the circular hole. A battery cell support beam (202) is provided on the inner side of the bottom of the battery box (1), and a circular hole is provided in the middle of the battery cell support beam (202), and a rivet nut (207) is press-fitted around the circular hole.

3. The double-layer structure battery pack constructed by multiple battery cell components according to claim 1, characterized in that: The lower layer battery cell assembly (5) comprises a plurality of battery cell bodies (301), the plurality of battery cell bodies (301) are connected back to back via a connecting piece (302), an aerogel (303) is arranged in the middle of the battery cell body (301), and the aerogel (303) is used for fire prevention and heat insulation, short-side epoxy plates (304) are arranged at both ends of the lower layer battery cell assembly (5), battery end plates (305) are arranged on the outside of the short-side epoxy plates (304), long-side epoxy plates (306) are arranged on both sides of the lower layer battery cell assembly (5), and two-side fixing brackets (307) are arranged on the outside of the long-side epoxy plates (306), and the two-side fixing brackets (307) are fixed to the battery end plates (305) by screws (308), and a buffer foam (309) is arranged at the bottom of the lower layer battery cell assembly (5).

4. The double-layer structure battery pack constructed by multiple battery cell components according to claim 1, characterized in that: The battery cell isolation plate assembly (10) comprises a battery cell isolation plate body (401), a reinforcing plate (402) is welded to the back of the battery cell isolation plate body (401), a battery cell support block (403) is welded to the front of the battery cell isolation plate body (401), a plurality of circular holes are provided on the battery cell support block (403), and M8 nuts (404) are press-riveted around the circular holes; a plurality of circular holes are provided on the battery cell isolation plate body (401), and M4 nuts (405) are press-riveted around the circular holes.

5. The double-layer structure battery pack constructed by multiple battery cell components according to claim 1, characterized in that: A plurality of circular holes are provided in the middle of the bracket assembly (13), and rivet nuts (207) are press-fitted around the circular holes.

6. The double-layer structure battery pack constructed by multiple battery cell components according to claim 1, characterized in that: The surface of the battery box (1) is affixed with a sealing foam (12), and an upper cover (15) is provided on the sealing foam (12), which is integrally locked and sealed by screws (16).

7. The double-layer structure battery pack constructed by multiple battery cell components according to claim 1, characterized in that: The outer side of the bottom of the battery box (1) is provided with a corner reinforcement rib (203), a corner reinforcement rib (204), and a corner reinforcement rib (205), and a fixing block (206) is welded to the corner reinforcement rib (203), the corner reinforcement rib (204), and the corner reinforcement rib (205).

8. The double-layer structure battery pack constructed by multiple battery cell components according to claim 1, characterized in that: The top of the battery box (1) is provided with a flange shape and is provided with a plurality of circular holes, and riveted nuts (207) are press-fitted around the circular holes.

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