Battery insulation shell structure and manufacturing and forming process

Abstract

The shell structure comprises an outer shell and an inner lining shell, a first opening is formed in one side of the outer shell, the inner lining shell is made of an insulating material, the inner lining shell is embedded into the outer shell from the first opening, and the inner lining shell is made of an insulating material. A first opening is formed in the inner wall of the outer shell, a second opening in the same direction as the first opening is formed in one end of the neck bush shell, a connecting ring is annularly arranged between the periphery, at the second opening, of the neck bush shell and the inner wall of the outer shell, the connecting ring is fixedly connected with the peripheral wall of the neck bush shell through welding, and the connecting ring is fixedly connected with the inner wall of the outer shell through welding. The shell structure comprises an outer shell and a neck bush shell embedded in the outer shell, a connecting ring is arranged between the neck bush shell and the outer shell, the connecting ring is fixedly connected with the outer shell and the neck bush shell through welding, and the neck bush shell is made of an insulating material, so that an insulating cavity is formed in the shell structure.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, in particular to a battery insulation shell structure and a manufacturing process. Background Art

[0002] Lithium batteries usually include a shell and a battery assembly located inside the shell. Insulation is required between the battery assembly and the shell. Therefore, after the shell is manufactured, a layer of insulating material is usually sprayed on the inner wall of the shell to meet the insulation requirements; or after the battery assembly is manufactured, the battery assembly is insulated, such as wrapping, injection molding, etc., to isolate the battery assembly from the shell. Although this achieves the insulation effect, it has the problems of high manufacturing cost, low production capacity, and low process reliability. Summary of the Invention

[0003] The purpose of the present invention is to solve the deficiencies of the above-mentioned technologies and to provide a battery insulation shell structure and manufacturing process.

[0004] The present invention includes a battery insulating shell structure, including an outer shell and an inner liner shell, a first opening is opened on one side of the outer shell, the inner liner shell is made of an insulating material, the inner liner shell is embedded in the outer shell from the first opening, a second opening is provided at one end of the inner liner shell in the same direction as the first opening, a connecting ring is provided between the outer periphery of the inner liner shell at the second opening and the inner wall of the outer shell, the connecting ring is fixedly connected to the outer peripheral wall of the inner liner shell by welding, and the connecting ring is fixedly connected to the inner wall of the outer shell by welding.

[0005] Preferably, the outer shell is enclosed by a first side panel, a second side panel, a third side panel, a fourth side panel and a bottom panel to form a box structure having an opening, and the opening is a first opening.

[0006] Further optimization is performed, the first side panel, the second side panel and the third side panel are formed by bending a plate body end to end; the fourth side panel and the bottom panel are fixedly connected by welding, or the fourth side panel and the bottom panel are integrally arranged.

[0007] Further optimization is carried out, the first side panel, the second side panel, the third side panel and the fourth side panel are connected by bending the ends of a plate body to form a box structure with openings at both ends, and the seams at the ends are located on one of the side panels with a narrow width and are connected by welding, the outer shell forms a first opening and a third opening at its two end openings respectively, and the bottom plate is welded at the third opening.

[0008] Further optimization is carried out, the inner walls of the first side plate, the second side plate, the third side plate and the fourth side plate are provided with grooves, and an intermediate layer is provided between the outer shell and the inner liner shell, and the intermediate layer is connected to the inner walls of the four side plates and enclosed with the grooves to form a constant temperature channel, and a heating source or a cooling source is poured into the constant temperature channel.

[0009] Preferably, the cross-section of the connecting ring is square, one side of the connecting ring is adhered to and welded to the inner liner shell, and the other opposite side of the connecting ring is adhered to and welded to the side inner wall of the outer shell; preferably, the inner wall of the outer shell is provided with a stepped surface, and the side surface and bottom surface of the connecting ring facing the side inner wall of the outer shell are engaged with the stepped surface; the second opening of the inner liner shell is bent outward to form a bent portion, or the outer peripheral wall of the inner liner shell near the second opening protrudes circumferentially to form a bent portion, and the connecting ring is engaged with the side surface and top surface of the outer peripheral wall of the inner liner shell.

[0010] Further optimization is performed, the material of the inner liner shell is an insulating material, and the material of the connecting ring is the same as that of the outer shell, which is metal.

[0011] The present invention also includes a manufacturing process comprising the following steps:

[0012] Step 1: Prepare a plate body, and open a groove on the inner wall surface of the plate body, wherein the groove extends to opposite ends of the plate body;

[0013] Step 2: The plate is bent and welded to form the outer shell;

[0014] Step 3: Prepare the sheet material, bend and weld the sheet material to form a tubular part, cut the open end of the tubular part longitudinally, and form a connecting ring after blanking;

[0015] Step 4: Prepare the liner shell, and put the connecting ring onto the second opening of the liner shell. One side of the connecting ring is attached to the outer wall of the liner shell, and the other side is used as the welding operation surface.

[0016] Step 5: Perform intensive continuous spot welding on the welding operation surface to securely connect the connecting ring to the liner shell, wherein the spot welding track is along the circumference of the connecting ring and located in the middle of the welding operation surface;

[0017] Step 6: Insert the inner liner shell with the connecting ring welded thereto into the outer shell so that the welding operation surface of the connecting ring is in contact with the inner wall of the outer shell;

[0018] Step 7: Perform intensive continuous spot welding along the intersection line between the top of the welding operation surface and the inner wall of the shell.

[0019] Preferably, in step 2, the plate body includes plate body 1 and plate body 2,

[0020] The first plate is bent to form a C-shaped plate with a right angle, the second plate is bent to form an L-shaped plate, and the L-shaped plate and the C-shaped plate are welded to form an outer shell having a first opening; or

[0021] The first plate is bent to form a C-shaped plate with a right-angle bending angle, and then the two open ends of the C-shaped plate are bent at right angles relative to each other and then butted together to form a seam line at the butt joint. The seam line is fixedly connected by welding, and the second plate is welded to the bottom thereof as a bottom plate, thereby forming an outer shell with a first opening.

[0022] The present invention also includes another manufacturing process, comprising the following steps:

[0023] Step 1: Prepare a plate body, and form an outer shell with a first opening at one end of the plate body by stamping;

[0024] Step 2: forming a groove on the inner wall surface of the outer shell, wherein the groove extends to opposite ends of the outer shell;

[0025] Step 3: Prepare the sheet material, bend and weld the sheet material to form a tubular part, cut the open end of the tubular part longitudinally, and form a connecting ring after blanking;

[0026] Step 4: Prepare the liner shell, and put the connecting ring on the second opening of the liner shell, with one side of the connecting ring attached to the outer wall of the liner shell and the other side serving as a welding operation surface;

[0027] Step 5: Perform intensive connection point welding on the welding operation surface to securely connect the connecting ring to the liner shell, wherein the spot welding trajectory is along the circumference of the connecting ring and located in the middle of the welding operation surface;

[0028] Step 6: Insert the inner liner shell with the connecting ring welded thereto into the outer shell so that the welding operation surface of the connecting ring is in contact with the inner wall of the outer shell;

[0029] Step 7: Perform intensive continuous spot welding along the intersection line between the top of the welding operation surface and the inner wall of the shell.

[0030] The technical effect of the present invention is that the outer shell has a first opening, the inner liner shell is embedded in the inner shell from the first opening, the inner liner shell is provided with a second opening on the same side of the first opening, the inner liner shell is made of insulating material, thereby forming an insulating cavity, and a connecting ring is provided between the outer peripheral wall of the inner liner shell at the first opening and the inner wall of the outer shell, and the connecting ring is respectively connected to the inner liner shell and the outer shell by welding, so that the inner liner shell and the outer shell are fixed together, and at the same time, the outer shell and the connecting ring are made of metal, such as aluminum, and the inner liner shell is made of insulating material, such as plastic, the outer shell and the connecting ring are welded with the same material, and the connecting ring and the inner liner shell are welded with different materials, and laser welding and penetration welding are respectively used for welding and fixing. By adopting different welding methods, the connection is stable and firm, and the inner liner The insulation life of the shell is longer; the opening of the liner shell is bent to form a bent portion, and the bent portion is engaged with the connecting ring, which improves the welding reliability between the connecting ring and the liner shell, and prevents the liner shell from shifting after the welding part is detached, that is, ensuring the stability of the liner shell, and also facilitates the addition of an end cover at the first opening; a groove is provided on the inner wall of the outer shell, and after the liner shell is embedded, the outer peripheral wall of the liner shell and the groove are enclosed to form a constant temperature channel, and a heat source or a cooling source is poured into the constant temperature channel, so that the entire shell can be in a heating, cooling or constant temperature state. In addition, an intermediate layer is provided between the liner shell and the outer shell, and the intermediate layer is welded and adhered to the inner wall of the outer shell and enclosed with the groove to form a constant temperature channel, so as to avoid leakage of the constant temperature channel caused by uneven fit between the liner shell and the inner wall of the outer shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is an appearance diagram of the overall structure of the present invention;

[0032] Figure 2 is a structural diagram of embodiment 1;

[0033] Figure 3 is a structural diagram of embodiment 2;

[0034] Figure 4 is a structural diagram of embodiment 3;

[0035] Figure 5 It is the structure when the inner wall of the liner shell has a stepped surface Figure 1 ;

[0036] Figure 6 It is the structure when the inner wall of the liner shell has a stepped surface Figure 2 ;

[0037] Figure 7 This is a structural diagram when the inner wall of the liner shell is flat;

[0038] Figure 8 This is a structural diagram of the inner liner shell having a bent portion;

[0039] Figure 9 It is the structural diagram of the constant temperature channel;

[0040] Figure 10 This is the positioning structure diagram of the liner shell and the connecting ring when using a fixture;

[0041] Figure 11 It is a structural diagram of the intersection line between the connecting ring and the inner wall of the shell.

[0042] In the figure: 1. outer shell; 11. first opening; 12. first side panel; 13. second side panel; 14. third side panel; 15. fourth side panel; 16. bottom panel; 17. third opening; 18. fourth opening; 19. stepped surface; 110. groove; 111. seam line; 112. constant temperature channel; 2. liner shell; 21. second opening; 22. bending part; 3. connecting ring; 31. welding operation surface; 32. spot welding track; 33. intersection line; 4. fixture. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention are within the scope of protection of the present invention.

[0044] Example 1

[0045] The present invention comprises an outer shell 1 and an inner liner shell 2, as Figure 1 and 2 As shown, the outer shell 1 is a box-shaped structure. In this embodiment, the outer shell 1 has six side walls, one of which is provided with a first opening 11, so that the outer shell 1 forms a box-shaped structure with an opening. The liner shell 2 is embedded in the outer shell 1 from the first opening 11. The liner shell 2 is also a box-shaped structure, which is convenient for placing the battery core components therein. A second opening 21 in the same direction as the first opening 11 is provided at one end of the liner shell 2. A connecting ring 3 is provided between the outer periphery of the liner shell 2 at the second opening 21 and the inner wall of the outer shell 1. In this embodiment, the connecting ring 3 is similar to a sealing ring, which is a strip-shaped structure. The connecting ring 3 is sleeved on the outer peripheral wall of the inner liner shell 2, and the connecting ring 3 is fitted with the outer peripheral wall of the inner liner shell 2, so that the connecting ring 3 and the outer peripheral wall of the inner liner shell 2 are fixedly connected by welding. After the inner liner shell 2 and the connecting ring 3 are fixed to each other, the inner liner shell 2 and the connecting ring 3 are embedded in the outer shell 1 together. At this time, the connecting ring 3 is also fitted with the inner wall of the outer shell 1, and then the connecting ring 3 and the inner wall of the outer shell 1 are fixedly connected by welding.

[0046] Furthermore, the outer shell 1 is made of metal, such as aluminum, the inner liner shell 2 is made of insulating material, such as plastic material, which can be PP, PET, etc., and the connecting ring 3 is also made of metal, such as aluminum, so that the connecting ring 3 and the outer shell 1 can be welded with the same material, and the connecting ring 3 and the inner liner shell 2 can be welded with different materials, making welding more convenient and lowering the defective rate; and the welding of different materials is usually laser welding, forming offline welding.

[0047] Furthermore, the cross section of the connecting ring 3 is square, one side of the connecting ring 3 is bonded and welded to the inner liner shell 2, and the other opposite side of the connecting ring 3 is bonded and welded to the inner wall of the outer shell 1, so that the welding surface area is maximized and the welding firmness is increased.

[0048] Furthermore, the inner wall of the outer shell 1 can be a plane or a stepped surface 19 can be provided. The side and bottom surfaces of the connecting ring 3 facing the inner wall of the outer shell 1 are engaged on the stepped surface 19 to limit the connecting ring 3. Then, the side surfaces of the connecting ring 3 facing the inner wall of the outer shell 1 and the inner wall of the outer shell 1 are welded.

[0049] The edge of the second opening 21 of the liner shell 2 is bent outward to form a bending portion 22, and the bending portion 22 is at a right angle to the peripheral wall of the liner shell 2. The bottom of the bending portion 22 forms a stepped engagement with the upper side of the connecting ring 3, making the welding fixation between the liner shell 2 and the connecting ring 3 more secure, while increasing the embedding firmness of the liner shell 2 in the outer shell 1.

[0050] Furthermore, the bent portion 22 may be formed by a circumferential protrusion of the outer peripheral wall of the liner shell 2 near the second opening 21 , that is, the bent portion 22 is formed as a circumferential protrusion protruding from the outer peripheral wall of the liner shell 2 .

[0051] Of course, when the inner wall of the shell is provided with a stepped surface 19 , the connecting ring 3 may not be necessary, and the bent portion 22 can be directly engaged with the stepped surface 19 and fixedly connected by welding.

[0052] Furthermore, the outer shell 1 includes a first side panel 12, a second side panel 13, a third side panel 14, a fourth side panel 15 and a bottom panel 16, wherein the first side panel 12, the second side panel 13 and the third side panel 14 are formed by bending a plate body end to end and connecting them, and the fourth side panel 15 and the bottom panel 16 are fixedly connected by welding, wherein the fourth side panel 15 and the bottom panel 16 are an integral plate body, that is, an L-shaped plate, and the opening of the fourth side panel 15 corresponding to the outer shell 1 is a fourth opening 18, and the L-shaped plate is welded to the shell surrounded by the three side panels, that is, the fourth side panel 15 is welded to the fourth opening 18, and the bottom panel 16 is welded to the third opening 17, which not only facilitates the embedding of the inner liner shell 2, but also makes the outer shell 1 less likely to deform during processing and forming compared to the one-piece molding processing method.

[0053] The first side plate 12, the second side plate 13, the third side plate 14 and the fourth side plate 15 are all provided with grooves 110 on the inner walls. After the four side plates are enclosed, the corresponding four grooves 110 form an annular groove 110. In this embodiment, the number of grooves 110 on each side plate is at least one, and the multiple grooves 110 on each side plate are distributed parallel to the height direction of the side plate, so that after the four side plates are enclosed, the side wall of the outer shell 1 is formed with multiple mutually parallel annular grooves 110. After the liner shell 2 is embedded in the outer shell 1, the outer wall of the liner shell 2 is attached to the inner wall of the outer shell 1, and the outer wall of the liner shell 2 covers the opening of the groove 110, so that the outer wall of the liner shell 2 and the groove 110 enclose a constant temperature channel 112. A heating source or a cooling source, such as a heating liquid or a cooling liquid, can be poured into the constant temperature channel 112 to achieve cooling, heating or constant temperature of the entire shell. A joint is provided on the outer peripheral wall of the outer shell 1, and the joint is communicated with the constant temperature channel 112. It is very convenient to perfuse or replace the liquid in the constant temperature channel 112 through the joint.

[0054] This embodiment also includes a manufacturing process for a battery insulating shell structure, which includes the following steps:

[0055] Step 1: Prepare plate body 1 and plate body 2. Both plate body 1 and plate body 2 are made of blanked plate materials. A groove 110 is opened on the surface of plate body 1. The groove 110 runs through the opposite ends of the plate body, so that the plate body 1 can form a ring-shaped constant temperature channel 112 when it is enclosed. In this embodiment, the groove 110 is opened by conventional technology, such as using a slotting machine to perform slotting processing on plate body 1.

[0056] Step 2: Plate 1 is bent into a C-shaped plate with a right angle, and plate 2 is bent into an L-shaped plate. The L-shaped plate and the C-shaped plate are welded to form an outer shell 1 having a first opening 11. The outer shell 1 is the outer shell 1 in Example 1, that is, the first side plate 12, the second side plate 13, and the third side plate 14 are enclosed to form a C-shaped plate, and the fourth side plate 15 and the bottom plate 16 are L-shaped plates.

[0057] This embodiment requires an intermediate layer. In this case, the intermediate layer is welded on the inner wall of each side plate. The intermediate layer can be made of metal or insulating material.

[0058] In this embodiment, the middle layer is connected to the surface of the plate body by welding to cover the groove 110, and then the plate body is bent.

[0059] Step 3: Prepare a plate, bend and weld the plate into a square tubular member, cut the open end of the tubular member longitudinally, and form a square connecting ring 3 after blanking;

[0060] After the liner shell 2 is in place, the liner shell 2 is in a state of being pressed against the welding surface 31 of the liner shell 2. The liner shell 2 is pressed against the welding surface 31 of the liner shell 2, and the liner shell 2 is in a state of being pressed against the welding surface 31 of the liner shell 2. The liner shell 2 is in a state of being being pressed against the welding surface 31 of the liner shell 2. The liner shell 2 is in a state of being being pressed against the welding surface 31 of the liner shell 2, and the liner shell 2 is in a state of being being pressed against the welding surface 31 of the liner shell 2.

[0061] Step 5: Perform penetrating and dense connection point welding on the welding operation surface 31 to securely connect the connecting ring 3 to the liner shell 2, wherein the spot welding tracks 32 are distributed along the circumference of the connecting ring 3 and are located in the middle of the welding operation surface 31;

[0062] Step 6: Insert the liner shell 2 with the connecting ring 3 welded thereto into the outer shell 1 so that the welding operation surface 31 of the connecting ring 3 is in contact with the inner wall of the outer shell 1;

[0063] Step 7. After the welding operation surface 31 is fitted onto the inner wall of the outer shell 1, a circular intersection line is formed between the top of the welding operation surface 31 and the inner wall of the outer shell 1 along the circumference of the connecting ring 3. Dense spot welding is performed along the intersection line 33 to fix the connection between the connecting ring 3 and the outer shell 1. In this embodiment, the spot welding here adopts dense continuous laser spot welding.

[0064] Example 2

[0065] The basic structure is the same as that of embodiment 1, except that the first side panel 12, the second side panel 13, the third side panel 14 and the fourth side panel 15 are connected by bending the end to end of a plate body to form a shell with openings at both ends. The end to end connection of the shell forms a seam line 111, which is located on one of the side panels and is connected by welding. The side panel is the side panel with a narrower width, and the openings at its two ends respectively form a first opening 11 and a third opening 17, and the bottom plate 16 is welded to the third opening 17.

[0066] This embodiment also includes a manufacturing process for a battery insulating shell structure, which includes the following steps:

[0067] Step 1: Prepare plate body 1 and plate body 2. Both plate body 1 and plate body 2 are made of blanked plate materials. A groove 110 is opened on the surface of plate body 1. The groove 110 runs through the opposite ends of the plate body, so that the plate body 1 can form a ring-shaped constant temperature channel 112 when it is enclosed. In this embodiment, the groove 110 is opened by conventional technology, such as using a slotting machine to perform slotting processing on plate body 1.

[0068] Step 2: Plate 1 is bent to form a C-shaped plate with a right angle, and then the two open ends of the C-shaped plate are bent at right angles relative to each other and then butted together, forming a seam line 111 at the butt joint. The seam line 111 is fixedly connected by welding, and Plate 2 is welded to the bottom of the bottom plate 16, thereby forming an outer shell 1 having a first opening 11. The outer shell 1 is the outer shell 1 in Example 2.

[0069] The intermediate layer in this embodiment may be provided or not provided. When providing the intermediate layer, reference may be made to the steps in the first embodiment.

[0070] Step 3: Prepare a plate, bend and weld the plate into a square tubular member, cut the open end of the tubular member longitudinally, and form a square connecting ring 3 after blanking;

[0071] After the liner shell 2 is in place, the liner shell 2 is in a state of being pressed against the welding surface 31 of the liner shell 2. The liner shell 2 is pressed against the welding surface 31 of the liner shell 2, and the liner shell 2 is in a state of being pressed against the welding surface 31 of the liner shell 2. The liner shell 2 is in a state of being being pressed against the welding surface 31 of the liner shell 2. The liner shell 2 is in a state of being being pressed against the welding surface 31 of the liner shell 2, and the liner shell 2 is in a state of being being pressed against the welding surface 31 of the liner shell 2.

[0072] Step 5: Perform penetrating and dense connection point welding on the welding operation surface 31 to securely connect the connecting ring 3 to the liner shell 2, wherein the spot welding tracks 32 are distributed along the circumference of the connecting ring 3 and are located in the middle of the welding operation surface 31;

[0073] Step 6: Insert the liner shell 2 with the connecting ring 3 welded thereto into the outer shell 1 so that the welding operation surface 31 of the connecting ring 3 is in contact with the inner wall of the outer shell 1;

[0074] Step 7. After the welding operation surface 31 is fitted onto the inner wall of the outer shell 1, a circular intersection line is formed between the top of the welding operation surface 31 and the inner wall of the outer shell 1 along the circumference of the connecting ring 3. Dense spot welding is performed along the intersection line 33 to fix the connection between the connecting ring 3 and the outer shell 1. In this embodiment, the spot welding here adopts dense continuous laser spot welding.

[0075] Example 3

[0076] The basic structure is the same as that of embodiment 1, except that the outer shell 1 is enclosed by a first side panel 12, a second side panel 13, a third side panel 14, a fourth side panel 15 and a bottom panel 16 to form a box structure with an opening, and the opening at the upper end is a first opening 11, that is, the first side panel 12, the second side panel 13, the third side panel 14, the fourth side panel 15 and the bottom panel 16 are integrated, and the first side panel 12, the second side panel 13, the third side panel 14, the fourth side panel 15 and the bottom panel 16 are formed by a plate body, such as stamping.

[0077] The present invention also includes a manufacturing process for a battery insulating shell structure, which includes the following steps:

[0078] Step 1: Prepare plate 1 and plate 2. Both plate 1 and plate 2 are made by blanking plates.

[0079] Step 2: The plate body 1 is directly stretched to form an outer shell 1 with a first opening 11 on the top. That is, the outer shell 1 is formed by directly stretching the plate body. The outer shell 1 is the outer shell 1 in the third embodiment.

[0080] Step 3: Prepare a plate, bend and weld the plate into a square tubular member, cut the open end of the tubular member longitudinally, and form a square connecting ring 3 after blanking;

[0081] After the liner shell 2 is in place, the liner shell 2 is in a state of being pressed against the welding surface 31 of the liner shell 2. The liner shell 2 is pressed against the welding surface 31 of the liner shell 2, and the liner shell 2 is in a state of being pressed against the welding surface 31 of the liner shell 2. The liner shell 2 is in a state of being being pressed against the welding surface 31 of the liner shell 2. The liner shell 2 is in a state of being being pressed against the welding surface 31 of the liner shell 2, and the liner shell 2 is in a state of being being pressed against the welding surface 31 of the liner shell 2.

[0082] Step 5: Perform penetrating and dense connection point welding on the welding operation surface 31 to securely connect the connecting ring 3 to the liner shell 2, wherein the spot welding tracks 32 are distributed along the circumference of the connecting ring 3 and are located in the middle of the welding operation surface 31;

[0083] Step 6: Insert the liner shell 2 with the connecting ring 3 welded thereto into the outer shell 1 so that the welding operation surface 31 of the connecting ring 3 is in contact with the inner wall of the outer shell 1;

[0084] Step 7. After the welding operation surface 31 is fitted onto the inner wall of the outer shell 1, a circular intersection line is formed between the top of the welding operation surface 31 and the inner wall of the outer shell 1 along the circumference of the connecting ring 3. Dense spot welding is performed along the intersection line 33 to fix the connection between the connecting ring 3 and the outer shell 1. In this embodiment, the spot welding here adopts dense continuous laser spot welding.

[0085] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that is the same or similar to that of the present application falls within the scope of protection of the present invention.

Claims

1. A battery insulation shell structure, characterized in that: The invention comprises an outer shell (1) and an inner liner shell (2), wherein a first opening (11) is provided on one side of the outer shell (1), and the inner liner shell (2) is made of an insulating material. The inner liner shell (2) is embedded in the outer shell (1) from the first opening (11), and a second opening (21) in the same direction as the first opening (11) is provided at one end of the inner liner shell (2). A connecting ring (3) is provided between the outer periphery of the inner liner shell (2) at the second opening (21) and the inner wall of the outer shell (1), and the connecting ring (3) is fixedly connected to the outer peripheral wall of the inner liner shell (2) by welding, and the connecting ring (3) is fixedly connected to the inner wall of the outer shell (1) by welding.

2. The battery insulation shell structure according to claim 1, characterized in that: The outer shell (1) is enclosed by a first side plate (12), a second side plate (13), a third side plate (14), a fourth side plate (15) and a bottom plate (16) to form a box structure having an opening, wherein the opening is a first opening (11).

3. The battery insulation shell structure according to claim 2, characterized in that: The first side plate (12), the second side plate (13), and the third side plate (14) are formed by bending a plate end to end; The fourth side plate (15) and the bottom plate (16) are fixedly connected by welding, or the fourth side plate (15) and the bottom plate (16) are integrally arranged.

4. The battery insulation shell structure according to claim 2, characterized in that: The first side panel (12), the second side panel (13), the third side panel (14) and the fourth side panel (15) are connected by bending the ends of a plate body to form a box structure with openings at both ends. The seams (111) at the ends are located on one of the side panels with a narrow width and are connected by welding. The outer shell (1) is formed with a first opening (11) and a third opening (17) at its two end openings, respectively, and the bottom plate (16) is welded to the third opening (17).

5. The battery insulation shell structure according to claim 2, characterized in that: The inner walls of the first side plate (12), the second side plate (13), the third side plate (14) and the fourth side plate (15) are all provided with grooves (110); an intermediate layer is provided between the outer shell (1) and the inner liner shell (2); the intermediate layer is connected to the inner walls of the four side plates and encloses the grooves (110) to form a constant temperature channel (112); a heating source or a cooling source is poured into the constant temperature channel (112).

6. The battery insulation shell structure according to claim 1, characterized in that: The cross section of the connecting ring (3) is square, one side of the connecting ring (3) is bonded to and welded with the inner liner shell (2), and the other opposite side of the connecting ring (3) is bonded to and welded with the side inner wall of the outer shell (1); Preferably, the inner wall of the outer shell (1) is provided with a stepped surface (19), and the connecting ring (3) is engaged with the stepped surface (19) on the side and bottom surface of the inner wall of the outer shell (1); the second opening (21) of the liner shell (2) is bent outward to form a bent portion (22), or the outer peripheral wall of the liner shell (2) near the second opening (21) protrudes in a circumferential direction to form a bent portion (22), and the connecting ring (3) is engaged with the bent portion (22) on the side and top surface of the outer peripheral wall of the liner shell (2).

7. The battery insulation shell structure according to claim 4, characterized in that: The material of the inner lining shell (2) is an insulating material, and the material of the connecting ring (3) is the same as that of the outer shell (1), and is metal.

8. A manufacturing process for a battery insulating shell structure according to any one of claims 1 to 7, characterized in that: The steps are as follows: Step 1: Prepare a plate body, and open a groove (110) on the inner wall surface of the plate body, wherein the groove (110) extends to opposite ends of the plate body; Step 2: The plate is bent and welded to form an outer shell (1); Step 3: Prepare the sheet material, bend and weld the sheet material to form a tubular member, longitudinally cut the open end of the tubular member, and blank the material to form a connecting ring (3); Step 4: Prepare the liner shell (2), and sleeve the connecting ring (3) onto the second opening (21) of the liner shell (2). One side of the connecting ring (3) is attached to the outer peripheral wall of the liner shell (2), and the other side serves as a welding operation surface (31); Step 5: Perform intensive continuous spot welding on the welding operation surface (31) to securely connect the connecting ring (3) to the liner shell (2), wherein the spot welding track (32) is along the circumference of the connecting ring (3) and is located in the middle of the welding operation surface (31); Step 6: embed the inner liner shell (2) with the connecting ring (3) welded thereto into the outer shell (1), so that the welding operation surface (31) of the connecting ring (3) is in contact with the inner wall of the outer shell (1); Step 7: Perform intensive continuous spot welding along the intersection line between the top of the welding operation surface (31) and the inner wall of the outer shell (1).

9. The manufacturing process according to claim 8, characterized in that: In step 2, the plate body includes plate body 1 and plate body 2, The first plate is bent to form a C-shaped plate with a right-angle bending angle, the second plate is bent to form an L-shaped plate, and the L-shaped plate and the C-shaped plate are welded to form an outer shell (1) having a first opening (11); or The first plate is bent to form a C-shaped plate with a right-angle bending angle, and then the two open ends of the C-shaped plate are bent at right angles relative to each other and then butted together, forming a seam line (111) at the butt joint. The seam line (111) is fixedly connected by welding, and the second plate is welded to the bottom thereof as a bottom plate (16), thereby forming an outer shell (1) with a first opening (11).

10. A manufacturing process for a battery insulating shell structure according to any one of claims 1 to 7, characterized in that: The steps are as follows: Step 1: Prepare a plate body, and form the plate body into an outer shell (1) with a first opening (11) at one end through a molding process; Step 2: Prepare the plate, bend and weld the plate to form a tubular member, longitudinally cut the open end of the tubular member, and blank the material to form a connecting ring (3); Step 3: Prepare the liner casing (2), and sleeve the connecting ring (3) onto the second opening (21) of the liner casing (2), with one side of the connecting ring (3) being attached to the outer peripheral wall of the liner casing (2), and the other side being used as a welding operation surface (31); Step 4: Perform intensive connection point welding on the welding operation surface (31) to securely connect the connecting ring (3) to the liner shell (2), wherein the spot welding track (32) is along the circumference of the connecting ring (3) and is located in the middle of the welding operation surface (31); Step 5: embed the inner liner shell (2) with the connecting ring (3) welded thereto into the outer shell (1), so that the welding operation surface (31) of the connecting ring (3) is in contact with the inner wall of the outer shell (1); Step 6: Perform intensive continuous spot welding along the intersection line between the top of the welding operation surface (31) and the inner wall of the outer shell (1).

Images