New energy power lithium battery system battery pack

Abstract

The utility model relates to battery pack technical field especially new energy power lithium electricity system battery pack, including lower box, upper cover is located, be equipped with the electric core subassembly in the lower box, the electric core subassembly includes a plurality of side plates along the interval distribution of lower box width direction, the second long strip metal sheet is equipped with respectively on the upper side of both ends of side plate, the second long strip metal sheet is fixedly connected with the interval number of second reinforcing pad between side plate, the second reinforcing pad between the both ends of adjacent side plate and its corresponding forms rectangular limit space, a plurality of lithium electric core is stacked along its length direction in rectangular limit space.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a new energy power lithium battery system battery pack. Background Technology

[0002] New energy power lithium battery systems are widely used in electric vehicles, construction machinery, energy storage power stations and other fields. These power lithium battery systems typically use a battery pack as the core energy unit, which generally consists of a casing, multiple cell modules and an electrical management system.

[0003] In the prior art, in order to improve assembly efficiency, power battery packs usually adopt a modular design, which means that multiple cells are pre-assembled into independent cell modules according to fixed specifications. Each module is an independent unit, and finally multiple modules are put into the battery pack housing, forming a complete battery pack system through conductive connectors, electrical interfaces and fixing structures.

[0004] While this "prefabricated modules, packaged assembly" structure simplifies the production process and improves assembly consistency, it also brings obvious limitations: fixed module specifications and difficulty in adjusting the number of cells and connection methods result in poor personalized design capabilities and insufficient structural flexibility for battery packs; modules need to be redesigned for different voltage platforms, resulting in poor compatibility and high development costs. Utility Model Content

[0005] The purpose of this utility model is to solve the problem of poor module prefabrication and poor overall packaging and personalized design capabilities mentioned in the background art, and to propose a new energy power lithium battery pack.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A new energy power lithium battery pack includes a lower housing and an upper cover. A cell assembly is disposed in the lower housing. The cell assembly includes a plurality of side plates spaced apart along the width direction of the lower housing. A second long strip sheet is disposed on the upper and lower sides of each end of the side plate. A second reinforcing plate with a spacing equal to that between the side plates is fixed to the second long strip sheet. A rectangular limiting space is formed between the adjacent side plates and the corresponding second reinforcing plates at their ends. A plurality of lithium battery cells are stacked along the length direction within the rectangular limiting space.

[0008] At least one of the rectangular limiting spaces has a length that is at least two-thirds greater than the length of the internal space of the lower housing.

[0009] Several first reinforcing plates are provided within a rectangular limiting space. The first reinforcing plates are arranged parallel to the second reinforcing plates, and the first reinforcing plates are fixedly assembled with the side plates on both sides.

[0010] The battery cell assembly includes several first long sheet metal strips, which are arranged parallel to the second long sheet metal strips, and the first reinforcing plate is fixedly assembled with the first long sheet metal strips.

[0011] The first reinforcing plate has a stretching channel, and the first long sheet metal has a through hole corresponding to the stretching channel. The first long sheet metal is connected to the stretching channel of the first reinforcing plate through the through hole by a connector.

[0012] The side plate has a second positioning groove for the second long strip of sheet metal to pass through and a first positioning groove for the first long strip of sheet metal to pass through.

[0013] The side plate has a bending edge around its perimeter that bends toward the lithium battery cell. The corner of the lithium battery cell is located inside the bending edge. The side plate has a first mounting hole, and the second long strip sheet metal has a second mounting hole on its side. The side plate is fixedly assembled with the second long strip sheet metal by rivets or screws passing through the first mounting hole.

[0014] The upper cover has a second flange around its perimeter, and the lower housing has a first flange around its perimeter. The second flange covers the first flange, and a sealing gasket is provided between the two. A ring plate is installed on the second flange, and the ring plate, the second flange, the sealing gasket, and the first flange are locked together by fasteners.

[0015] At least one support frame is provided on every two cell assemblies, and electrode plates are positioned on the support frame;

[0016] And / or, the upper cover is equipped with an explosion-proof valve;

[0017] And / or, the lower housing is equipped with external components;

[0018] And / or, an insulating sheet is sandwiched between every two lithium battery cells;

[0019] And / or, the battery cell assembly includes multiple right-angled sheet metal strips, and each of the four corners of the rectangular limiting space is provided with at least one right-angled sheet metal strip, and the right-angled sheet metal strip is at least partially sandwiched between the side plate and the lithium battery cell.

[0020] The new energy power lithium battery pack proposed in this utility model has the following advantages: the operator can stack the corresponding number of lithium battery cells along the length of each rectangular limit space according to the required voltage or capacity, so that the battery pack can flexibly select the number of lithium battery cells to be loaded according to different voltage platforms or capacity requirements, realize the free configuration of the number of battery cells, and improve the system's compatibility and design freedom. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the side plate position structure of this utility model;

[0024] Figure 4 This is a partial front view sectional structural diagram of the present invention;

[0025] Figure 5 This is a schematic diagram of the side plate structure of this utility model;

[0026] Figure 6 This is a schematic diagram of the right-angle sheet metal strip distribution structure of this utility model. Figure 1 ;

[0027] Figure 7 This is a schematic diagram of the right-angle sheet metal strip distribution structure of this utility model. Figure 2 ;

[0028] Figure 8 This is a schematic diagram of the support frame structure of this utility model;

[0029] Figure 9 This is a partial left-side sectional view of the present invention.

[0030] Figure 10 for Figure 9 Structural diagram of Part A;

[0031] Figure 11 This is a schematic diagram of the right-angle sheet metal strip structure of this utility model. Figure 3 ;

[0032] Figure 12 This is a schematic diagram of the position structure of the first reinforcing plate and the first long strip sheet metal of this utility model;

[0033] Figure 13 This is a schematic diagram of the rectangular limiting space structure of this utility model;

[0034] Figure 14 A schematic diagram of the first reinforcing plate structure for the rectangular limiting space of this utility model.

[0035] In the diagram: 1. Top cover; 2. Explosion-proof valve; 3. Lower housing; 4. External component; 5. Battery cell assembly; 7. Side plate; 8. First assembly hole; 9. First long strip sheet metal; 10. Second long strip sheet metal; 11. First positioning groove; 12. Second positioning groove; 13. Second reinforcing plate; 14. Lithium battery cell; 15. Bending edge; 16. Second assembly hole; 17. Right angle sheet metal strip; 18. Support frame; 19. First flange; 20. Fastener; 21. Second flange; 22. Ring plate; 23. Sealing gasket; 24. Connector; 26. Rectangular limiting space; 27. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0037] Reference Figures 1-14 A new energy power lithium battery pack includes a lower housing 3 and an upper cover 1. A cell assembly 5 is provided inside the lower housing 3. The cell assembly 5 includes multiple side plates 7 spaced apart along the width direction of the lower housing 3. Second long strip sheet metal 11 is provided on the upper and lower sides of both ends of the side plates 7. Second reinforcing plates 14 with the same number of intervals as the side plates 7 are fixed to the second long strip sheet metal 11. A rectangular limiting space 27 is formed between adjacent side plates 7 and the corresponding second reinforcing plates 14 at both ends. A number of lithium battery cells 15 are stacked along the length direction of the rectangular limiting space 27.

[0038] refer to Figure 3 , Figure 7 , Figure 13 In this device, multiple side plates 7 are arranged at intervals along the width direction of the lower box 3. The upper and lower ends of the side plates 7 are respectively equipped with second long strip sheet metal 11. Several second reinforcing plates 14 are fixed on the second long strip sheet metal 11. A rectangular limiting space 27 is formed between adjacent side plates 7 and the corresponding second reinforcing plates 14.

[0039] During assembly, the operator can stack the corresponding number of lithium battery cells 15 along the length of each rectangular limiting space 27 according to the required voltage or capacity. This allows the battery pack to flexibly select the number of lithium battery cells 15 to be installed according to different voltage platforms or capacity requirements, realizing the free configuration of the number of cells and improving the system's compatibility and design freedom.

[0040] In one implementation, at least two rows of stacked lithium battery cells are installed in each lower housing 3, and at least one rectangular limiting space 27 has a length that is at least two-thirds greater than the length of the internal space of the lower housing 3, thereby improving the utilization rate of the internal space of the lower housing 3.

[0041] A plurality of first reinforcing plates 9 are provided within the rectangular limiting space 27. The first reinforcing plates 9 and the second reinforcing plates 14 are arranged in parallel. The first reinforcing plates 9 are fixedly assembled with the side plates 7 on both sides. The battery cell assembly 5 includes a plurality of first long strip sheet metal 10. The first long strip sheet metal 10 and the second long strip sheet metal 11 are arranged in parallel. The first reinforcing plates 9 and the first long strip sheet metal 10 are fixedly assembled.

[0042] Several first reinforcing plates 9 are arranged within the rectangular limiting space 27. The first reinforcing plates 9 are arranged parallel to the second reinforcing plates 14 and are fixedly assembled with the side plates 7 on both sides. The first reinforcing plates 9 play a role in lateral limiting and structural support inside the cell assembly 5, so that the lithium cell 15 in each rectangular limiting space 27 remains stably positioned when stacked and installed, preventing displacement of the cell during transportation or use.

[0043] The battery cell assembly 5 includes several first long sheet metal strips 10, which are arranged parallel to second long sheet metal strips 11. A first reinforcing plate 9 is fixedly assembled to the first long sheet metal strips 10. Through the continuous connection of the first long sheet metal strips 10, multiple first reinforcing plates 9 form an integral load-bearing frame inside the lower housing 3, thereby connecting the structures of all battery cell assemblies 5 within the lower housing 3 into a single unit, significantly improving the overall rigidity and seismic resistance of the battery cell assembly.

[0044] refer to Figure 12 The first reinforcing plate 9 has a stretching channel, and the first long sheet metal 10 has a through hole corresponding to the stretching channel. The first long sheet metal 10 is connected to the stretching channel of the first reinforcing plate 9 through the through hole via a connector 26. For example, the first reinforcing plate 9 is formed by stretching, and the connector 26 is a self-tapping screw. The fixed assembly of the first long sheet metal 10 and the first reinforcing plate 9 is simple and convenient. The second long sheet metal 11 and the second reinforcing plate 14 can also be fixed and assembled in the same way.

[0045] The side panel 7 has a second positioning groove 13 for the second long sheet metal 11 to pass through and a first positioning groove 12 for the first long sheet metal 10 to pass through. The design of multiple positioning grooves enables the first long sheet metal 10 and the second long sheet metal 11 to be positioned and assembled with the side panel 7, thereby improving the structural stability after assembly.

[0046] refer to Figure 3 , Figure 5 , Figure 11 The side plate 7 has a bending edge 16 around its perimeter that bends toward the lithium battery cell 15. The corner of the lithium battery cell 15 is located inside the bending edge 16. The side plate 7 has a first mounting hole 8. The second long strip sheet metal 11 has a second mounting hole 17 on its side. The side plate 7 is fixedly assembled with the second long strip sheet metal 11 through the first mounting hole 8 by rivets or screws.

[0047] The side plate 7 has bending edges 16 formed by bending towards the lithium battery cell 15 around its perimeter. The bending edges 16 are used to limit the corner positions of the lithium battery cell 15, so that the lithium battery cell 15 is stably positioned within the rectangular limiting space 27, preventing displacement during assembly or operation. The side plate 7 has a first mounting hole 8, and the second long strip sheet metal 11 has a second mounting hole 17 on its side. During assembly, the side plate 7 is fixed to the second long strip sheet metal 11 by rivets or screws passing through the first mounting hole 8, thereby achieving a firm connection of the battery cell assembly 5 and ensuring the overall structural strength and assembly accuracy.

[0048] Further reference Figure 11 The battery cell assembly 5 includes multiple right-angle sheet metal strips 18. Each rectangular limiting space 27 has at least one right-angle sheet metal strip 18 at each of its four corners. The right-angle sheet metal strips 18 are at least partially sandwiched between the side plate 7 and the lithium battery cell 15. The distribution of the right-angle sheet metal strips 18 at the four corners of the lithium battery cell 15 improves the stability and protection performance of the structure.

[0049] refer to Figure 10 As an assembly method of upper cover 1 and lower housing 3, upper cover 1 has a second flange 22 around its perimeter, and lower housing 3 has a first flange 20 around its perimeter. The second flange 22 covers the first flange 20, and a sealing gasket 24 is placed between the two. A ring plate 23 is installed on the second flange 22. The ring plate 23, the second flange 22, the sealing gasket 24, and the first flange 20 are locked together by fasteners 21. During assembly, the second flange 22 covers the first flange 20, and a sealing gasket 24 is placed between the two to achieve a seal. A ring plate 23 is installed on the outer side of the second flange 22. The ring plate 23, the second flange 22, the sealing gasket 24, and the first flange 20 are locked together by fasteners 21, so that the upper cover 1 and the lower housing 3 form a reliable sealed connection, thereby ensuring the waterproof, dustproof, and safe sealing performance of the battery cell assembly 5 inside the housing.

[0050] At least one support frame 19 is provided on every two battery cell assemblies 5. An electrode plate is positioned on the support frame 19. The electrode plate connects the battery cells in series. Multiple lithium battery cells are fastened together by the cooperation of the support frame 19 and the electrode plate, thereby improving the connection stability between the battery cells.

[0051] As one implementation method, the top cover 1 is equipped with an explosion-proof valve 2. When the internal air pressure of the box is too high, the explosion-proof valve will release pressure to ensure safety.

[0052] In one implementation, the lower housing 3 is equipped with an external component 4, which includes, but is not limited to, a heating plug, a negative plug, a communication plug, a maintenance switch, a BMU slave unit, a BMS, and a connecting harness.

[0053] As one implementation method, an insulating sheet is sandwiched between every two lithium battery cells 15 to improve the insulation between the lithium battery cells.

[0054] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any technical solution, concept, or design obtained by those skilled in the art by making equivalent substitutions or changes based on the technical solution and utility model concept disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A new energy power lithium battery system battery pack, comprising a lower box (3), an upper cover (1), characterized in that, A battery cell assembly (5) is provided inside the lower housing (3). The battery cell assembly (5) includes multiple side plates (7) spaced apart along the width direction of the lower housing (3). Second long strip sheet metal (11) is provided on the upper and lower sides of both ends of the side plates (7). Second reinforcing plates (14) with the same number of intervals as the side plates (7) are fixed on the second long strip sheet metal (11). A rectangular limiting space (27) is formed between the adjacent side plates (7) and the corresponding second reinforcing plates (14) at both ends. Several lithium battery cells (15) are stacked in the rectangular limiting space (27) along its length direction.

2. The new energy power lithium battery system battery pack according to claim 1, characterized in that, At least one of the rectangular limiting spaces (27) has a length that is at least two-thirds greater than the length of the internal space of the lower box (3).

3. The new energy power lithium battery system battery pack according to claim 1, characterized in that, A plurality of first reinforcing plates (9) are provided within a rectangular limiting space (27). The first reinforcing plates (9) are arranged in parallel with the second reinforcing plates (14), and the first reinforcing plates (9) are fixedly assembled with the side plates (7) on both sides.

4. The new energy power lithium battery system battery pack according to claim 3, characterized in that, The battery cell assembly (5) includes several first long sheet metal strips (10), the first long sheet metal strips (10) and the second long sheet metal strips (11) are arranged in parallel, and the first reinforcing plate (9) is fixedly assembled with the first long sheet metal strips (10).

5. The new energy power lithium battery system battery pack according to claim 4, characterized in that, The first reinforcing plate (9) has a stretching channel, and the first long strip sheet metal (10) has a through hole corresponding to the stretching channel. The first long strip sheet metal (10) is connected to the stretching channel of the first reinforcing plate (9) through the through hole via a connector (26).

6. The new energy power lithium battery system battery pack according to claim 4, characterized in that, The side plate (7) has a second positioning groove (13) for the second long strip sheet metal (11) to pass through and a first positioning groove (12) for the first long strip sheet metal (10) to pass through.

7. A new energy power lithium battery system battery pack according to any one of claims 1-6, characterized in that, The side plate (7) has a bending edge (16) around its perimeter that bends toward the lithium battery cell (15). The corner of the lithium battery cell (15) is located inside the bending edge (16). The side plate (7) has a first mounting hole (8). The second long strip sheet metal (11) has a second mounting hole (17) on its side. The side plate (7) is fixedly assembled with the second long strip sheet metal (11) by rivets or screws passing through the first mounting hole (8).

8. A new energy power lithium battery system battery pack according to any one of claims 1-6, characterized in that, The upper cover (1) has a second flange (22) around its perimeter, and the lower box (3) has a first flange (20) around its perimeter. The second flange (22) covers the first flange (20) and there is a sealing gasket (24) between the two. A ring plate (23) is installed on the second flange (22). The ring plate (23), the second flange (22), the sealing gasket (24), and the first flange (20) are locked together by fasteners (21).

9. A new energy power lithium battery system battery pack according to any one of claims 1-6, characterized in that, At least one support frame (19) is provided on every two cell assemblies (5), and an electrode sheet is positioned on the support frame (19); And / or, the upper cover (1) is equipped with an explosion-proof valve (2); And / or, the lower housing (3) is equipped with an external component (4); And / or, an insulating sheet is sandwiched between every two lithium battery cells (15); And / or, the battery cell assembly (5) includes a plurality of right-angled sheet metal strips (18), and each of the four corners of the rectangular limiting space (27) is provided with at least one right-angled sheet metal strip (18), and the right-angled sheet metal strip (18) is at least partially sandwiched between the side plate (7) and the lithium battery cell (15).

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