Battery Insulating Housing Structure

Abstract

The present invention discloses a battery insulation housing structure, wherein the housing structure comprises an outer housing and an inner liner shell, wherein a first opening is opened on one side of the outer housing, and the inner liner shell is installed by being inserted into the outer housing through the first opening, and a second opening is installed at one end of the inner liner shell in the same direction as the first opening, and a connecting ring is installed annularly between the outer circumference of the second opening point of the inner liner shell and the inner wall of the outer housing, and the connecting ring and the outer wall of the inner liner shell are fixedly connected through welding, and the connecting ring and the inner wall of the outer housing are fixedly connected through welding.

Description

Technology Field

[0001] The present invention relates to the field of lithium battery technology, and in particular to a battery insulation housing structure. Background Technology

[0002] A lithium battery typically includes a housing and a battery assembly located inside the housing, and since insulation is required between the battery assembly and the housing, typically, after the housing is manufactured, a layer of insulating material is sprayed onto the inner wall of the housing to satisfy the insulation requirement; or after the battery assembly is manufactured, insulation treatment is performed on the battery assembly, and, for example, processing methods such as packaging or injection molding are performed on the battery assembly to isolate the battery assembly from the housing. Although this achieves an insulation effect, there are problems such as high manufacturing costs, low production capacity, and low process reliability. The problem to be solved

[0003] The objective of the present invention is a battery insulation housing structure designed to solve the disadvantages of the above technology. means of solving the problem

[0004] The present invention comprises a battery insulating housing structure, an outer housing, an inner liner shell made of an insulating material, and a connecting ring installed in an annular shape. A shell cavity is installed inside the outer housing, and a first opening is installed on one side of the shell cavity; the inner liner shell is installed through the first opening and is installed at least partially embedded inside the shell cavity of the outer housing, and a second opening corresponding to the first opening is installed on the inner liner shell; the connecting ring is installed between the second opening and the outer housing, and the connecting ring is in contact with the outer wall of the second opening and the inner wall of the first opening. Among these, the connecting ring and the outer wall of the inner liner shell are fixedly connected, and the connecting ring and the inner wall of the outer housing are fixedly connected.

[0005] Preferably, the outer housing is formed by being surrounded by a first side plate, a second side plate, a third side plate, a fourth side plate, and a bottom plate, and constitutes a box having a cubic shape and an opening, wherein the first side plate and the third side plate are installed opposite each other, the second side plate and the fourth side plate are installed opposite each other, the bottom plate and the first opening are installed opposite each other, and the opening is formed as the first opening.

[0006] In some preferred embodiments, the first side plate, the second side plate, and the third side plate are formed by folding a single plate body back and forth; the fourth side plate and the bottom plate are fixedly connected by welding, or the fourth side plate and the bottom plate are installed integrally.

[0007] In some other preferred embodiments, the first side plate, second side plate, third side plate, and fourth side plate are box structures formed by folding and connecting a single plate body back and forth, having openings at both ends, the joint line is located on the side plate of the narrow side and is connected by welding, the outer housing forms a first opening and a third opening at the respective openings at both ends, and the bottom plate is welded at the third opening point.

[0008] Preferably, concave grooves are installed on the inner walls of the first side plate, second side plate, third side plate, and fourth side plate, and are intended to form a constant temperature passage between the outer housing and the inner liner shell, through which a heating source or a cooling source is injected.

[0009] Preferably, the cross-section of the connecting ring is square, one side of the connecting ring is welded in close contact with the inner liner shell, and the other side of the connecting ring is welded in close contact with the side inner wall of the outer housing.

[0010] Further, a stepped surface is installed on the inner wall of the outer housing, and the side and bottom surfaces of the connecting ring facing the inner wall of the outer housing are fitted into the stepped surface; the second opening of the inner liner shell is bent outward to form a bent portion, or the outer wall of the inner liner shell at a point adjacent to the second opening protrudes annularly to form a bent portion, and the side and top surfaces of the connecting ring facing the outer wall of the inner liner shell are fitted into the bent portion.

[0011] Preferably, the material of the inner liner shell is an insulating material, and the material of the connecting ring and the outer housing is the same and metal. Effects of the invention

[0012] The technical effect of the present invention is that the outer housing is provided with a first opening, the inner liner shell is installed by being inserted into the outer housing from the first opening, the inner liner shell has a second opening installed on the same side as the first opening, the inner liner shell is made of an insulating material to form an insulating cavity, a connecting ring is installed between the outer wall of the second opening point of the inner liner shell and the inner wall of the outer housing, and the connecting ring is connected to the inner liner shell and the outer housing respectively through welding so that the inner liner shell and the outer housing are fixedly connected, and at the same time, both the outer housing and the connecting ring are made of a metal material, for example, aluminum, the inner liner shell is made of an insulating material, for example, plastic, the connection between the outer housing and the connecting ring is welded with the same material, and the connection between the connecting ring and the inner liner shell is welded with a different material, and the welding fixing method of laser welding and through welding is respectively employed, and by employing different welding methods, the connection is made stable and robust, and the insulation life of the inner liner shell is extended; After the opening point of the inner liner shell is bent, a bent portion is formed, and the bent portion and the connecting ring form a fit, thereby improving the welding reliability between the connecting ring and the inner liner shell and preventing the inner liner shell from being displaced after the welded portion is separated, i.e., ensuring the stability of the inner liner shell, and at the same time, it is convenient to add an end cover at the first opening point; a concave groove is installed on the inner wall of the outer housing, and after the inner liner shell is inserted, the outer wall of the inner liner shell and the concave groove surround each other to form a constant temperature passage, and a heat source or a cooling source is injected into the constant temperature passage so that the entire housing can be heated, cooled, or in a constant temperature state. Brief explanation of the drawing

[0013] FIG. 1 is an overall structural view of the present invention; FIG. 2 is a structural diagram of Example 1; FIG. 3 is a structural diagram of Example 2; FIG. 4 is a structural diagram of Example 3; FIG. 5 is a structural diagram 1 when the inner wall of the inner liner shell is provided with a stepped surface; FIG. 6 is a structural diagram 2 when the inner wall of the inner liner shell is provided with a stepped surface; FIG. 7 is a structural diagram when the inner wall of the inner liner shell is flat; FIG. 8 is a structural diagram in which an inner liner shell is provided with a bent portion; Fig. 9 is a structural diagram of a constant temperature passage; FIG. 10 is a structural diagram of the positioning of the inner liner shell and the connecting ring when employing a work fixing jig; Figure 11 is a structural diagram of the intersection line between the connecting ring and the inner wall of the outer housing. Specific details for implementing the invention

[0014] The following description, in conjunction with the drawings of the embodiments of the present invention, clearly and completely explains the technical methods of the embodiments of the present invention. Clearly, the described embodiments are merely some embodiments of the present invention and not all embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention fall within the scope of protection of the present invention.

[0016] Example 1

[0017] The present invention includes an outer housing (1) and an inner liner shell (2). As illustrated in FIGS. 1 to 3, the outer housing (1) is a box-shaped structure, and in this embodiment, the outer housing (1) has five side walls, and a first opening (11) is opened in the outer housing (1), thereby forming a box structure with one opening in the outer housing (1), and the inner liner shell (2) passes through the first opening (11) and is installed by being inserted into the outer housing (1), and the inner liner shell (2) is also a box-shaped structure, and it is convenient to place a battery cell assembly therein, and a second opening (21) is installed at one end of the inner liner shell (2) in the same direction as the first opening (11), and a connecting ring (3) is installed annularly between the outer circumference of the point of the second opening (21) of the inner liner shell (2) and the inner wall of the outer housing (1). In this embodiment, the connecting ring (3) is similar to a sealing ring and is a molded structure. The connecting ring (3) is fitted onto the outer wall of the inner liner shell (2), and the connecting ring (3) and the outer wall of the inner liner shell (2) form a close contact. In this way, it is convenient to fix the connection between the connecting ring (3) and the outer wall of the inner liner shell (2) through 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 installed together into the outer housing (1). At this time, the connecting ring (3) is also in close contact with the inner wall of the outer housing (1), and then the connection between the connecting ring (3) and the inner wall of the outer housing (1) is fixedly connected through welding. Among them, the first side plate (12) and the third side plate (14) are installed facing each other, the second side plate (13) and the fourth side plate (15) are installed facing each other, and the bottom plate (16) and the first opening (11) are installed facing each other.

[0018] Furthermore, the outer housing (1) is made of a metal material, for example, aluminum, and the inner liner shell (2) is made of an insulating material, for example, a plastic material, such as PP, PET, etc., and the connecting ring (3) is also made of a metal material, for example, aluminum, and the connection between the connecting ring (3) and the outer housing (1) can be welded with the same material, and the connection between the connecting ring (3) and the inner liner shell (2) can be welded with different materials, making welding more convenient and lowering the defect rate; the welding of different materials is typically laser welding and forms a welded fixation.

[0019] Furthermore, the cross-section of the connecting ring (3) forms a square, and one side of the connecting ring (3) is welded in close contact with the inner liner shell (2), and the opposite side of the connecting ring (3) is welded in close contact with the inner wall of the outer housing (1), thereby maximizing the weld surface area and increasing the weld strength.

[0020] Furthermore, the inner wall of the outer housing (1) may be flat, or a stepped surface (19) may be installed, as shown in FIG. 6. The side and bottom surfaces of the connecting ring (3) facing the inner wall of the outer housing (1) are each fitted into the stepped surface (19) and positioned with respect to the connecting ring (3), and then the side of the connecting ring (3) facing the inner wall of the outer housing (1) and the inner wall of the outer housing (1) are welded together, as shown in FIG. 6 and FIG. 7.

[0021] As shown in FIG. 5, the edge of the second opening (21) of the inner liner shell (2) is bent outward to form a bent portion (22), and the bent portion (22) and the surrounding wall of the inner liner shell (2) form a right angle, and the bottom of the bent portion (22) forms a stepped fit with one side of the upper side of the connecting ring (3), thereby making the welded fixation between the inner liner shell (2) and the connecting ring (3) more secure, and at the same time increasing the secureness of the indented installation inside the outer housing (1) of the inner liner shell (2).

[0022] Furthermore, the bend portion (22) may be further formed by protruding annularly from the outer wall at a point close to the second opening (21) of the inner liner shell (2), that is, the bend portion (22) is formed by protruding from the outer wall of the inner liner shell (2) as an annular projection, as shown in FIG. 8.

[0023] Of course, when a step surface (19) is installed on the inner wall of the housing, a connecting ring (3) may not be necessary, and the bent portion (22) is directly fitted to the step surface (19) and fixedly connected through welding.

[0024] Furthermore, the outer housing (1) includes 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), wherein the first side plate (12), the second side plate (13), and the third side plate (14) are integrally molded and installed, and can be formed by bending a single plate body back and forth, and the second side plate (13) is integrally molded between the first side plate (12) and the third side plate (14), as shown in FIG. 3. The fourth side plate (15) and the bottom plate (16) are fixedly connected through welding, and the fourth side plate (15) and the bottom plate (16) are composed of a plate body installed integrally, that is, an L-shaped plate, and the opening corresponding to the outer housing (1) of the fourth side plate (15) is the fourth opening (18), and the L-shaped plate is welded onto the housing surrounded by three side plates, that is, the fourth side plate (15) is welded to the fourth opening (18), and the bottom plate (16) is welded to the third opening (17). In this way, not only is the insertion installation of the inner liner shell (2) convenient, but the combined welding method of the present invention also makes it difficult for the outer housing (1) to deform compared to the integral molding method when the outer housing (1) is processed and molded.

[0025] A concave groove (110) is installed on the inner wall of the first side plate (12), the second side plate (13), the third side plate (14), and the fourth side plate (15), and after the four side plates are surrounded, the corresponding four concave grooves (110) are surrounded to form a single annular concave groove (110), as shown in FIG. 9. In this embodiment, the number of concave grooves (110) on each side plate is at least one, and a plurality of concave grooves (110) on each side plate are distributed parallel along the height direction of the side plate, and thus, after the four side plates are enclosed, a plurality of mutually parallel annular concave grooves (110) are formed on the side wall of the outer housing (1), and after the inner liner shell (2) is inserted and installed inside the outer housing (1), the outer wall of the inner liner shell (2) is in close contact with the inner wall of the outer housing (1), and the outer wall of the inner liner shell (2) covers the opening point of the concave groove (110), and thus the outer wall of the inner liner shell (2) and the concave groove (110) are enclosed to form a constant temperature passage (112), and a heating source or a cooling source can be injected into the constant temperature passage (112), such as a heating liquid or a cooling liquid, and thereby, cooling, heating, or constant temperature of the entire housing is realized. A connecting head is installed on the outer wall of the outer housing (1), and the connecting head and the constant temperature passage (112) are connected, and injection or liquid replacement is performed in the constant temperature passage (112) through the connecting head, which is very convenient.

[0026] The manufacturing molding process of the battery insulation housing structure of the present embodiment includes the following steps:

[0027] Step 1, plate 1 and plate 2 are prepared, and both plate 1 and plate 2 are manufactured by blanking the plate material, and a concave groove (110) is opened on the surface of plate 1, and the concave groove (110) penetrates both opposing ends of the plate, so that a perfectly circular constant temperature passage (112) can be formed after the plate 1 is surrounded, and in this embodiment, the method of opening the concave groove (110) is a conventional technique, and for example, a groove processing machine can be employed to perform groove processing on plate 1.

[0028] Step 2, plate body 1 forms a C-shaped plate with a right-angle bending angle through bending, plate body 2 forms an L-shaped plate through bending, and an outer housing (1) having a first opening (11) is formed by welding the L-shaped plate and the C-shaped plate, and the outer housing (1) is the outer housing (1) of Example 1, that is, the first side plate (12), the second side plate (13), and the third side plate (14) surround to form a C-shaped plate, and the fourth side plate (15) and the bottom plate (16) are L-shaped plates;

[0029] This embodiment requires an intermediate layer, wherein the intermediate layer is welded onto the inner wall of each side plate, and the intermediate layer may be made of a metal material or an insulating material.

[0030] In this embodiment, the intermediate layer is closely connected through welding to the surface of plate 1, the concave groove (110) is covered, and then the plate is folded.

[0031] Step 3, prepare a plate, and the plate is formed into a square pipe-shaped member through bending and welding, and longitudinal cutting is performed on the open end of the pipe-shaped member, and a square connecting ring (3) is formed after blanking;

[0032] Step 4, an inner liner shell (2) is prepared. In this embodiment, the material of the inner liner shell (2) is plastic, and it is manufactured through injection or blow molding. A connecting ring (3) is installed in a sleeve at the second opening (21) of the inner liner shell (2). One side of the connecting ring (3) is in close contact with the outer wall of the inner liner shell (2), and the other side becomes the welding work surface (31). In this process, a work fixing jig (4) may be employed. In this embodiment, the work fixing jig (4) adopts a block structure. The inner liner shell (2) is inserted upside down and installed in a sleeve on the work fixing jig (4). The outer wall of the work fixing jig (4) supports and aligns the inner liner shell (2). After the side of the connecting ring (3) is in close contact with the inner liner shell (2), the welding work surface (31) of the connecting ring (3) is pressed, thereby allowing the connecting ring (3) to be in close contact with the outer wall of the inner liner shell (2) in a flat manner. Also, connecting The second opening (21) of the ring (3) and the inner liner shell (2) can be aligned by coming into contact with the work fixing jig (4), the position of the connecting ring (3) and the inner liner shell (2) is limited, and the connecting ring (3) and the inner liner shell (2) are prevented from being displaced during the welding process;

[0033] Step 5, penetrating and dense connection point welding is performed on the welding work surface (31) so that the connecting ring (3) and the inner liner shell (2) are fixedly connected, and the point welding trajectory (32) is distributed along the peripheral direction of the connecting ring (3), and the point welding trajectory (32) is also located at an intermediate position on the welding work surface (31);

[0034] Step 6, the inner liner shell (2) with the connecting ring (3) welded thereto is inserted into the outer housing (1) so that the welded working surface (31) of the connecting ring (3) is in close contact with the inner wall of the outer housing (1);

[0035] Step 7, after the welding work surface (31) and the inner wall of the outer housing (1) are in close contact, a single annular intersection line is formed between the top part of the welding work surface (31) and the inner wall of the outer housing (1) along the direction of the connecting ring (3), and dense spot welding is performed along the intersection line (33) so that the connecting ring (3) and the outer housing (1) are fixedly connected, and in this embodiment, the spot welding here employs dense continuous laser spot welding.

[0037] Example 2

[0038] The basic structure is the same as in Example 1, and the difference is that, as shown in FIG. 4, the first side plate (12), the second side plate (13), the third side plate (14), and the fourth side plate (15) form a housing in which a single plate body is folded and connected back and forth to form openings at both ends, the front and back connection points of the housing form a joint line (111), the joint line (111) is located on one of the side plates and connected through welding, the side plate is a side plate with a relatively narrow width, and a first opening (11) and a third opening (17) are formed at the opening points at both ends, respectively, and the bottom plate (16) is welded at the third opening (17) point.

[0039] The manufacturing molding process of the battery insulation housing structure of the present embodiment includes the following steps:

[0040] Step 1, plate 1 and plate 2 are prepared, and both plate 1 and plate 2 are manufactured by blanking the plate material, and a concave groove (110) is opened on the surface of plate 1, and the concave groove (110) penetrates both opposing ends of the plate, so that a perfectly circular constant temperature passage (112) can be formed after the plate 1 is surrounded, and in this embodiment, the method of opening the concave groove (110) is a conventional technique, and for example, a groove processing machine can be employed to perform groove processing on plate 1.

[0041] Step 2, plate body 1 forms a C-shaped plate with a right angle of bending through bending, and then two open ends of the C-shaped plate proceed with opposite right-angle bending and are docked, the docking point forms a joint line (111), and the joint line (111) point is fixedly connected through welding, and plate body 2 is welded to the bottom as a bottom plate (16), thereby forming an external housing (1) having a first opening (11), and the external housing (1) is the external housing (1) of Example 2.

[0042] The intermediate layer of this embodiment may or may not be installed, and when installed, the steps of Example 1 may be referred to.

[0043] Step 3, prepare a plate, and the plate is formed into a rectangular tubular member through bending and welding, and longitudinal cutting is performed on the open end of the tubular member, and a connecting ring (3) forming a rectangle is formed after blanking;

[0044] Step 4, an inner liner shell (2) is prepared. In this embodiment, the material of the inner liner shell (2) is plastic, and it is manufactured through injection or blow molding. A connecting ring (3) is installed in a sleeve at the second opening (21) of the inner liner shell (2). One side of the connecting ring (3) is in close contact with the outer wall of the inner liner shell (2), and the other side becomes the welding work surface (31). In this process, a work fixing jig (4) may be employed. In this embodiment, the work fixing jig (4) adopts a block structure. The inner liner shell (2) is installed in a sleeve inverted and is installed in the sleeve on the work fixing jig (4). The outer wall of the work fixing jig (4) supports and positions the inner liner shell (2). After the side of the connecting ring (3) is in close contact with the inner liner shell (2), the welding work surface (31) of the connecting ring (3) is pressed, thereby allowing the connecting ring (3) to be flatly attached to the outer wall of the inner liner shell (2). Also, connecting The second opening (21) of the ring (3) and the inner liner shell (2) can be aligned by coming into contact with the work fixing jig (4), the position of the connecting ring (3) and the inner liner shell (2) is limited, and the connecting ring (3) and the inner liner shell (2) are prevented from being displaced during the welding process;

[0045] Step 5, penetrating and dense connection point welding is performed on the welding work surface (31) so that the connecting ring (3) and the inner liner shell (2) are fixedly connected, and the point welding trajectory (32) is distributed along the peripheral direction of the connecting ring (3), and the point welding trajectory (32) is also located at an intermediate position on the welding work surface (31);

[0046] Step 6, the inner liner shell (2) with the connecting ring (3) welded thereto is inserted into the outer housing (1) so that the welded working surface (31) of the connecting ring (3) is in close contact with the inner wall of the outer housing (1);

[0047] Step 7, after the welding work surface (31) and the inner wall of the outer housing (1) are in close contact, a single annular intersection line is formed between the top part of the welding work surface (31) and the inner wall of the outer housing (1) along the direction of the connecting ring (3), and dense spot welding is performed along the intersection line (33) so that the connecting ring (3) and the outer housing (1) are fixedly connected, and in this embodiment, the spot welding here employs dense continuous laser spot welding.

[0049] Example 3

[0050] The basic structure is the same as in Example 1, and the difference is that the outer housing (1) is a box structure having an opening formed by surrounding 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), and the top opening is the first opening (11), that is, the first side plate (12), the second side plate (13), the third side plate (14), the fourth side plate (15) and the bottom plate (16) are integral, and the first side plate (12), the second side plate (13), the third side plate (14), the fourth side plate (15) and the bottom plate (16) are manufactured by forming through a single plate body, for example, press forming, and structurally similar to that shown in FIG. 2.

[0051] The manufacturing molding process of the battery insulation housing structure of the present invention comprises the following steps:

[0052] Step 1, prepare plate 1 and plate 2, and both plate 1 and plate 2 are manufactured by blanking the plate material;

[0053] Step 2, the plate body 1 forms an outer housing (1) having a first opening (11) at the top through direct drawing, that is, the outer housing (1) is formed by directly drawing the plate body, and the outer housing (1) is the outer housing (1) of Example 3.

[0054] Step 3, prepare a plate, and the plate is formed into a rectangular tubular member through bending and welding, and longitudinal cutting is performed on the open end of the tubular member, and after blanking, a rectangular connecting ring (3) is formed.

[0055] Step 4, an inner liner shell (2) is prepared. In this embodiment, the material of the inner liner shell (2) is plastic, and it is manufactured through injection or blow molding. A connecting ring (3) is installed in a sleeve at the second opening (21) of the inner liner shell (2). One side of the connecting ring (3) is in close contact with the outer wall of the inner liner shell (2), and the other side becomes the welding work surface (31). In this process, a work fixing jig (4) may be employed. In this embodiment, the work fixing jig (4) adopts a block structure. The inner liner shell (2) is installed in a sleeve inverted and is installed in the sleeve on the work fixing jig (4). The outer wall of the work fixing jig (4) supports and positions the inner liner shell (2). After the side of the connecting ring (3) is in close contact with the inner liner shell (2), the welding work surface (31) of the connecting ring (3) is pressed, thereby allowing the connecting ring (3) to be flatly attached to the outer wall of the inner liner shell (2). Also, connecting The second opening (21) of the ring (3) and the inner liner shell (2) can be aligned by coming into contact with the work fixing jig (4), the position of the connecting ring (3) and the inner liner shell (2) is limited, and the connecting ring (3) and the inner liner shell (2) are prevented from being displaced during the welding process.

[0056] Step 5, penetrating and dense connection point welding is performed on the welding work surface (31) so that the connecting ring (3) and the inner liner shell (2) are fixedly connected, and the point welding trajectory (32) is distributed along the peripheral direction of the connecting ring (3), and the point welding trajectory (32) is also located at an intermediate position on the welding work surface (31).

[0057] Step 6, the inner liner shell (2) with the connecting ring (3) welded thereto is inserted into the outer housing (1) so that the welded working surface (31) of the connecting ring (3) is in close contact with the inner wall of the outer housing (1).

[0058] Step 7, after the welding work surface (31) and the inner wall of the outer housing (1) are in close contact, a single annular intersection line is formed between the top part of the welding work surface (31) and the inner wall of the outer housing (1) along the direction of the connecting ring (3), and dense spot welding is performed along the intersection line (33) so that the connecting ring (3) and the outer housing (1) are fixedly connected, and in this embodiment, the spot welding here employs dense continuous laser spot welding.

[0059] The present invention is not limited to the optimal embodiment described above, and anyone may obtain various other forms of products under the disclosure of the present invention; however, any technical solution identical or similar to the present invention, regardless of any changes made to its shape or structure, falls within the scope of protection of the present invention. Explanation of the symbols

[0060] 1, outer housing; 11, first opening; 12, first side plate; 13, second side plate; 14, third side plate; 15, fourth side plate; 16, bottom plate; 17, third opening; 18, fourth opening; 19, stepped surface; 110, recess; 111, joint line; 112, constant temperature passage; 2, inner liner shell; 21, second opening; 22, bent portion; 3, connecting ring; 31, welding work surface; 32, spot weld trajectory; 33, intersection line; 4, work fixing jig.

Claims

Claim 1 In a battery insulation housing structure, as an outer housing (1), a first opening (11) is opened on one side of the outer housing (1); as an inner liner shell (2) made of an insulating material, the inner liner shell (2) is installed by being inserted into the outer housing (1) through the first opening (11), and a second opening (21) is installed at one end of the inner liner shell (2) in the same direction as the first opening (11); and as a connecting ring (3), the connecting ring (3) is installed between the outer circumference of the second opening (21) and the inner wall of the outer housing (1), and the connecting ring (3) is installed in an annular shape; wherein the connecting ring (3) and the outer wall of the inner liner shell (2) are fixed together by welding, and the connecting ring (3) and the inner wall of the outer housing (1) are fixedly connected; the outer housing (1) is a box structure having an opening formed by being surrounded 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), and the opening is formed as a first opening (11); a concave groove (110) is installed on the inner wall of the first side plate (12), the second side plate (13), the third side plate (14), and the fourth side plate (15), and the outer A battery insulation housing structure used to form a constant temperature passage between the housing (1) and the inner liner shell (2). Claim 2 A battery insulation housing structure according to claim 1, wherein the first side plate (12), the second side plate (13), and the third side plate (14) are formed by folding a single plate body back and forth; and 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 installed as a single unit. Claim 3 In paragraph 2, the first side plate (12), second side plate (13), third side plate (14) and fourth side plate (15) are box structures formed by folding and connecting a single plate body back and forth, having openings at both ends, the joint line (111) is located on the narrow side plate and connected by welding, the outer housing (1) forms a first opening (11) and a third opening (17) at the respective openings at both ends, and the bottom plate (16) is welded at the third opening (17), thus forming a battery insulation housing structure. Claim 4 A battery insulation housing structure according to claim 1, wherein the cross-section of the connecting ring (3) is square, one side of the connecting ring (3) is welded in close contact with the inner liner shell (2), and the other side of the connecting ring (3) is welded in close contact with the side inner wall of the outer housing (1); a stepped surface (19) is installed on the inner wall of the outer housing (1), and the side and bottom surfaces of the connecting ring (3) facing the side inner wall of the outer housing (1) are fitted into the stepped surface (19); the second opening (21) of the inner liner shell (2) is bent outward to form a bent portion (22), or the outer wall of the inner liner shell (2) at a point close to the second opening (21) protrudes in an annular shape to form a bent portion (22), and the side and top surfaces of the connecting ring (3) facing the outer wall of the inner liner shell (2) are fitted into the bent portion (22). Claim 5 A battery insulation housing structure according to paragraph 3, wherein the material of the inner liner shell (2) is an insulating material, and the material of the connecting ring (3) and the outer housing (1) is the same and is metal. Claim 6 delete Claim 7 delete Claim 8 delete

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