Light lithium battery shell

Abstract

The utility model discloses a light lithium battery shell which comprises a bottom shell and an upper cover, the bottom shell and the upper cover are matched and detachably buckled, lithium battery units are arranged in the bottom shell in a rectangular array mode, a clamping base is arranged at the bottom of the bottom shell, and the lithium battery units are installed on the clamping base in a positioning mode. The front side and the rear side of the bottom shell are respectively provided with a supporting frame, each supporting frame is provided with a positioning and clamping assembly, and each positioning and clamping assembly is used for fixing each lithium battery unit. The utility model aims to solve the problem of providing a light lithium battery shell.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium batteries, and in particular relates to a lightweight lithium battery shell. Background Art

[0002] To effectively protect lithium-ion battery packs from external pressure and direct impact, such as collisions and falls, the outer casing effectively cushions the internal battery components, absorbing and dissipating impact forces and preventing damage to key components such as the electrodes, separator, and electrolyte. However, in addition to external damage, lithium-ion batteries can also be susceptible to overcharge, causing excessive embedding of lithium ions into the negative electrode material, resulting in volume expansion. Excessive discharge can dissolve impurities such as copper in the negative electrode material and deposit them on the positive electrode surface, damaging the positive electrode structure and potentially causing battery deformation.

[0003] The high quality of the lithium battery pack itself, coupled with its safety protective shell, further improves its overall quality. In addition, since the lithium battery pack is positioned and fixed as a whole during installation, if an individual battery cell bulges or deforms, the entire battery pack needs to be unfastened and the faulty single lithium battery cell replaced. This operation is not only complicated, but also affects the integrity of the other battery packs, increasing the risk of subsequent failures. Utility Model Content

[0004] The purpose of the utility model is to solve the problem of replacing and repairing a single lithium battery unit in the prior art and to propose a lightweight lithium battery shell.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a lightweight lithium battery shell, comprising a bottom shell and an upper cover, the bottom shell and the upper cover are adapted to be detachably fastened together, the lithium battery cells are arranged in a rectangular array in the bottom shell, a card seat is provided at the bottom of the bottom shell, the lithium battery cells are positioned and installed on the card seat, support frames are provided on the front and back sides of the bottom shell, and a positioning card assembly is provided on the support frame, and the positioning card assembly fixes each lithium battery cell.

[0006] As a further description of the above technical solution: the positioning clamping assembly includes a mounting rod, with connecting heads provided at both ends of the mounting rod, the connecting heads are connected to the support frame, and a clamping plate is rotatably provided on the mounting rod, and the clamping plate corresponds one-to-one to the lithium battery unit.

[0007] As a further description of the above technical solution: a handle is provided on the upper surface of the upper cover.

[0008] As a further description of the above technical solution: the clamping seat is divided into a corner clamping seat and a middle clamping seat, the corner clamping seat is provided with a positioning clamping groove, and the middle clamping seat is provided with a clamping notch.

[0009] As a further description of the above technical solution: the lower edge of the upper cover is bent to form a plug-in edge, and the bottom shell and the upper cover are connected by bolts.

[0010] As a further description of the above technical solution: the mounting rod and the connecting heads on both sides form a U-shaped structure, and the mounting rod is arranged in the gap between two adjacent lithium battery units on the left and right.

[0011] As a further description of the above technical solution: the mounting rod is provided with pairs of rotating ear seats, a fixed shaft is fixed between each pair of the rotating ear seats, the clamping plate is rotatably provided on the fixed shaft, and there are two clamping plates rotatably provided on each fixed shaft, and the two clamping plates correspond one-to-one to the lithium battery units on the left and right sides of the mounting rod.

[0012] As a further description of the above technical solution: the rotating ear seat is provided with a sliding groove along the left and right directions, and a sliding plate is provided in the sliding groove, the sliding plate contacts the upper surface of the pressure plate, and a torsion spring is provided between the pressure plate and the fixed shaft, and the sliding plate is provided with a latch, and the rotating ear seat is provided with a card hole corresponding to the latch, and the sliding plate has three positioning positions, namely a left limit position, a middle limit position and a right limit position, when the sliding plate moves to the left limit position, the pressure plate located on the left side of the mounting rod remains horizontal and presses its corresponding lithium battery unit; when the sliding plate moves to the middle limit position, the pressure plate located on the left side of the mounting rod remains horizontal and presses its corresponding lithium battery unit, and the pressure plate located on the right side of the mounting rod remains horizontal and presses its corresponding lithium battery unit; when the sliding plate moves to the right limit position, the pressure plate located on the right side of the mounting rod remains horizontal and presses its corresponding lithium battery unit.

[0013] As a further description of the above technical solution: the bottom of the support frame is fixedly connected to the bottom shell, a reinforcing rib is provided in the middle of the support frame, and the support frame is made of stainless steel.

[0014] As a further description of the above technical solution: the bottom shell and the upper cover are both made of stainless steel.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0016] (1) In the present invention, by adopting a bottom shell and upper cover made of stainless steel and cooperating with a supporting frame and a card seat, the overall weight is reduced without reducing the supporting strength. In addition, the lithium battery cells are arranged in a rectangular array and the gaps provided between adjacent lithium battery cells can increase the heat dissipation of the battery.

[0017] (2) Each lithium battery cell can be fixed individually by the positioning clamping assembly, and multiple lithium battery cells are fixed by the clamping plate set on the mounting rod. Therefore, it also has a certain degree of integrity. The individually fixed lithium battery cells can be disassembled, assembled and replaced individually, thereby improving maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention from another angle, wherein the upper cover is not shown;

[0020] Figure 3 This is a three-dimensional structural diagram of the bottom shell, the card seat and the support frame of the utility model, wherein the bottom shell is a partial cross-sectional view;

[0021] Figure 4 This is an exploded view of the utility model;

[0022] Figure 5 This is a three-dimensional structural diagram of the mounting rod of the utility model;

[0023] Figure 6 This is an exploded view of the sliding rod and the pressing plate of the utility model.

[0024] Legend: 1. Lithium battery cell; 2. Bottom shell; 3. Upper cover; 4. Handle; 5. Connecting edge; 6. Corner connector; 7. Middle connector; 8. Connecting notch; 9. Positioning connector slot; 10. Support frame; 11. Reinforcement rib; 12. Mounting rod; 13. Connector; 14. Clamping plate; 15. Rotating ear seat; 16. Fixed shaft; 17. Sliding groove; 18. Sliding plate; 19. Latch; 20. Clamp hole. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying 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.

[0026] See also Figure 1-6, the utility model provides a technical solution for a lightweight lithium battery shell:

[0027] A lightweight lithium battery shell includes a bottom shell 2 and an upper cover 3. The bottom shell 2 and the upper cover 3 are both integrally formed of stainless steel. The bottom shell 2 and the upper cover 3 are adapted to be detachably fastened together. The lower edge of the upper cover 3 is bent inward to form an insertion edge 5. The insertion edge 5 is adapted to the upper end opening of the bottom shell 2. The bottom shell 2 and the upper cover 3 are connected by bolts. A handle 4 is provided on the upper surface of the upper cover 3 to facilitate the transportation of the lithium battery pack.

[0028] The lithium battery cells 1 are arranged in a rectangular array in the bottom shell 2, and there are uniform gaps between adjacent lithium battery cells 1. A card holder is provided at the bottom of the bottom shell 2, and the lithium battery cells 1 are positioned and installed on the card holder. The card holder is divided into a corner card holder 6 and a middle card holder 7. The corner card holder 6 is provided with a positioning card slot 9, and the middle card holder 7 is provided with a card notch 8. Each lithium battery cell 1 corresponds to a card notch 8 and two positioning card slots 9. The four corners and the middle of the bottom of the lithium battery cell 1 are supported by the card holder. The card holder is made of aluminum alloy and is fixed to the bottom of the bottom shell 2 by bolts. The lithium battery cell 1 is supported by the card holder so that there is a gap between the lithium battery cell and the bottom shell 2, so that the heat dissipation for the lithium battery cell 1 can be well carried out.

[0029] Support frames 10 are provided on both the front and rear sides of the bottom shell 2. Positioning clips are installed on the support frames 10 to secure the four corners above each lithium battery cell 1. The bottom of the support frame 10 is fixedly connected to the bottom shell 2. Reinforcing ribs 11 are provided in the middle of the support frame 10. The support frame 10 is made of stainless steel and is bolted to the bottom shell 2.

[0030] The positioning clamping assembly includes a mounting rod 12, with connecting heads 13 provided at both ends of the mounting rod 12. The mounting rod 12 and the connecting heads 13 on both sides form a U-shaped structure. The mounting rod 12 is arranged in the gap between two adjacent lithium battery cells 1 on the left and right. The connecting head 13 is connected to the support frame 10 by bolts. A clamping plate 14 is rotatably provided on the mounting rod 12. The clamping plate 14 corresponds one-to-one to the lithium battery cell 1. Limiting protrusions are provided on the front and rear sides of one end of the clamping plate 14 away from the mounting rod 12. When the clamping plate 14 is pressed on the upper surface of the lithium battery cell 1, the limiting protrusions on the front and rear sides limit the front and rear of the lithium battery cell 1.

[0031] In order to position and fix each lithium battery unit 1 only by two pressing plates 14 , it is convenient for individual maintenance, disassembly and replacement. The mounting rod 12 is provided with a pair of rotating ear seats 15, and a fixed shaft 16 is fixed between each pair of rotating ear seats 15. The pressure plate 14 is rotatably set on the fixed shaft 16, and each fixed shaft 16 is rotatably provided with two pressure plates 14. The two pressure plates 14 correspond to the lithium battery units 1 on the left and right sides of the mounting rod 12. The rotating ear seat 15 is provided with a sliding groove 17 along the left and right directions, and a sliding plate 18 is provided in the sliding groove 17. The sliding plate 18 contacts the upper surface of the pressure plate 14, and a torsion spring is provided between the pressure plate 14 and the fixed shaft 16. A latch 19 is provided on the sliding plate 18, and a card hole 20 corresponding to the latch 19 is provided on the rotating ear seat 15. Specifically, a sliding hole is provided on the sliding plate 18, and the latch 19 is slidably set in the sliding hole. A toggle rod perpendicular to it is fixed on the latch 19, and the sliding plate 18 has three positioning positions, namely, a left limit position, a middle limit position and a right limit position. When the sliding plate 18 moves to the left limit position, the clamping plate 14 located on the left side of the mounting rod 12 remains horizontal and presses its corresponding lithium battery unit 1; when the sliding plate 18 moves to the middle limit position, the clamping plate 14 located on the left side of the mounting rod 12 remains horizontal and presses its corresponding lithium battery unit 1, and the clamping plate 14 located on the right side of the mounting rod 12 remains horizontal and presses its corresponding lithium battery unit 1; when the sliding plate 18 moves to the right limit position, the clamping plate 14 located on the right side of the mounting rod 12 remains horizontal and presses its corresponding lithium battery unit 1.

[0032] Working principle: When installing the lithium battery unit 1, first fix the mounting rod 12 on the support frame 10, and then install the lithium battery units 1 one by one in the bottom shell 2. When installing the lithium battery unit 1, first slide the sliding plate 18 on the clamping plate 14 corresponding to the lithium battery installation position to a position away from the installation position of the lithium battery unit 1. Under the action of the torsion spring, the clamping plate 14 rotates to a vertical state, and then place the lithium battery unit 1 on the card seat. The corresponding corner clamping seat 6 and the middle clamping seat 7 limit the dead angle of the bottom of the lithium battery unit 1 and the headquarters in the horizontal plane, and then slide the sliding plate 18 so that the clamping plate 14 is pressed on the lithium battery unit 1, so that the lithium battery unit 1 is completely fixed. After all the lithium battery units 1 are installed using the above method, slide all the sliding plates 18 to the middle limit position so that all the clamping plates 14 are pressed on the lithium battery unit 1. At this time, the pin 19 is adapted to its corresponding card hole 20.

[0033] When individual lithium battery cells 1 are found to be deformed or faulty and need to be removed or replaced individually, first release the pins 19 on the sliding plates 18 on both sides of the lithium battery cell 1 from the card holes 20, then slide the sliding plates 18 away from the lithium battery cell 1, and under the action of the torsion springs, the two clamping plates 14 corresponding to the lithium battery cell 1 rotate to a vertical state. At this time, the lithium battery cell 1 can be directly taken out from above the card seat for replacement and repair.

[0034] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lightweight lithium battery housing, characterized in that The invention comprises a bottom shell (2) and an upper cover (3), wherein the bottom shell (2) and the upper cover (3) are adapted to be detachably fastened together, wherein lithium battery units (1) are arranged in a rectangular array in the bottom shell (2), wherein a card seat is provided at the bottom of the bottom shell (2), and the lithium battery units (1) are positioned and mounted on the card seat, wherein support frames (10) are provided at both the front and rear sides of the bottom shell (2), wherein a positioning card assembly is provided on the support frame (10), and wherein the positioning card assembly fixes each lithium battery unit (1).

2. A lightweight lithium battery casing according to claim 1, characterized in that: The positioning clamping assembly comprises a mounting rod (12), with connectors (13) provided at both ends of the mounting rod (12), the connectors (13) being connected to the support frame (10), and a pressing plate (14) being rotatably provided on the mounting rod (12), the pressing plate (14) corresponding one-to-one to the lithium battery unit (1).

3. The lightweight lithium battery casing according to claim 1, characterized in that: A handle (4) is provided on the upper surface of the upper cover (3).

4. The lightweight lithium battery casing according to claim 1, characterized in that: The clamping seat is divided into a corner clamping seat (6) and a middle clamping seat (7). The corner clamping seat (6) is provided with a positioning clamping groove (9), and the middle clamping seat (7) is provided with a clamping notch (8).

5. The lightweight lithium battery casing according to claim 1, characterized in that: The lower edge of the upper cover (3) is bent to form an inserting edge (5), and the bottom shell (2) and the upper cover (3) are connected by bolts.

6. The lightweight lithium battery casing according to claim 2, characterized in that: The mounting rod (12) and the connecting heads (13) on both sides form a U-shaped structure, and the mounting rod (12) is arranged in the gap between two adjacent lithium battery units (1) on the left and right.

7. The lightweight lithium battery casing according to claim 2, characterized in that: The mounting rod (12) is provided with a pair of rotating ear seats (15), a fixed shaft (16) is fixedly provided between each pair of the rotating ear seats (15), the pressing plate (14) is rotatably provided on the fixed shaft (16), and each fixed shaft (16) is rotatably provided with two pressing plates (14), and the two pressing plates (14) correspond one to one with the lithium battery units (1) on the left and right sides of the mounting rod (12).

8. The lightweight lithium battery casing according to claim 7, characterized in that: The rotating ear seat (15) is provided with a sliding groove (17) along the left and right directions, and a sliding plate (18) is provided in the sliding groove (17). The sliding plate (18) contacts the upper surface of the pressing plate (14), and a torsion spring is provided between the pressing plate (14) and the fixed shaft (16). A latch (19) is provided on the sliding plate (18), and a card hole (20) corresponding to the latch (19) is provided on the rotating ear seat (15). The sliding plate (18) has three positioning positions, namely a left limit position, a middle limit position and a right limit position. When the sliding plate (18) moves to the left limit position , the pressing plate (14) located on the left side of the mounting rod (12) remains horizontal and presses its corresponding lithium battery unit (1); when the sliding plate (18) moves to the middle limit position, the pressing plate (14) located on the left side of the mounting rod (12) remains horizontal and presses its corresponding lithium battery unit (1), and the pressing plate (14) located on the right side of the mounting rod (12) remains horizontal and presses its corresponding lithium battery unit (1); when the sliding plate (18) moves to the right limit position, the pressing plate (14) located on the right side of the mounting rod (12) remains horizontal and presses its corresponding lithium battery unit (1).

9. The lightweight lithium battery casing according to claim 1, characterized in that: The bottom of the support frame (10) is fixedly connected to the bottom shell (2), a reinforcing rib (11) is provided in the middle of the support frame (10), and the support frame (10) is made of stainless steel.

10. The lightweight lithium battery casing according to claim 1, characterized in that: The bottom shell (2) and the upper cover (3) are both made of stainless steel.

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