Lithium battery assembly connecting frame with double-layer negative pressure adsorption positioning function

Abstract

The invention discloses a lithium battery assembly connecting frame for double-layer negative pressure adsorption positioning, and belongs to the technical field of battery assembly.A battery main body is placed in a mounting groove in a shell, when the battery main body extrudes two piston rods, gas in piston cylinders is guided into two sealing frames through a flow guide pipe and two branch pipes, and the two sealing frames are sealed through the flow guide pipe and the two branch pipes; the sealing frame expands and is embedded into the sealing groove outside the battery main body, and along with continuous downward movement of the battery main body, air in the mounting groove is guided into the negative pressure box through the air guide pipe in the groove until the embedded plate at the bottom of the battery main body is clamped into the groove, so that the air cannot flow back into the mounting groove through the negative pressure box and the air guide pipe; the battery main body is hermetically connected by matching with the sealing frame, so that the purpose of double-layer negative-pressure adsorption positioning of the battery main body is achieved, the traditional mode of assembling the battery main body by adopting multiple groups of bolt pieces is abandoned, the battery main body is prevented from being loosened and hard collided with the shell to cause damage while the assembling stability of the battery main body is improved, and the use safety is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of battery assembly, and in particular relates to a double-layer negative pressure adsorption positioning lithium battery assembly connection frame. Background Art

[0002] Lithium battery packs are generally composed of multiple single cells connected together through a connecting frame and a bus to form a series-parallel structure to output a larger voltage and power to meet the power needs of various occasions.

[0003] In order to ensure the stability of lithium battery installation, lithium battery assembly connecting frames on the market currently usually use multiple sets of bolts to position the lithium battery, which is not convenient for rapid replacement of lithium batteries and is prone to cause safety hazards of electric shock during operation. At the same time, frequent disassembly and assembly work is likely to cause certain wear and tear on the installation holes and cause thread slippage, so that the installation stability of the lithium battery cannot be effectively guaranteed. Once the bolts are loose, the lithium battery will collide hard with the connecting frame, which is easy to cause damage to the lithium battery, greatly reducing its safety. Summary of the invention

[0004] In order to overcome the above-mentioned defects, the present invention provides a double-layer negative pressure adsorption positioning lithium battery assembly connecting frame, which solves the problem that the lithium battery is positioned by using multiple sets of bolts, which is not convenient for quick replacement of the lithium battery and is prone to cause safety hazards of electric shock during operation. At the same time, frequent disassembly and assembly work is likely to cause certain wear and tear on the mounting holes and cause thread slippage, so that the installation stability of the lithium battery cannot be effectively guaranteed. Once the bolts are loose, the lithium battery will collide hard with the connecting frame, which is easy to cause damage to the lithium battery.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a double-layer negative pressure adsorption positioning lithium battery assembly connection frame, comprising a shell, two sides of the top of the shell are respectively provided with mounting grooves, the mounting grooves are provided with a battery body, two sides of the bottom of the shell are respectively provided with through grooves, the through grooves are provided with an adsorption component, the adsorption component passes through the bottom of the shell and is connected to the mounting grooves, the same negative pressure box is connected between the two adsorption components, a negative pressure regulating component is installed in the negative pressure box, the front of the negative pressure box is connected with an exhaust component, the front and back of the shell are respectively provided with through holes, and the ends of the negative pressure regulating component and the ends of the exhaust component are respectively arranged in the two through holes;

[0006] An embedded plate is fixedly connected to the bottom of the battery body, and the embedded plate is clamped in the adsorption component. Two groups of sealing grooves are opened on the outside of the battery body, and expansion sealing components are connected to the two groups of sealing grooves. The bottom end of the expansion sealing component is fixed to the bottom of the through groove. A limiting component is provided in the middle of the shell, and the two sides of the limiting component are respectively overlapped with the tops of the two battery bodies.

[0007] As a further solution of the present invention: the adsorption assembly includes a box body, which is clamped in the bottom of the installation groove. The box body is arc-shaped and has a groove. The embedded plate is clamped in the groove. The bottom of the box body is connected to two air ducts, and the other ends of the two air ducts are connected to the negative pressure box.

[0008] As a further solution of the present invention: the negative pressure regulating assembly includes a screw rod, one end of which is connected to a bearing, a piston column is clamped on the bearing, and the piston column is arranged in the negative pressure box.

[0009] As a further solution of the present invention: a retaining ring is provided on one side of the piston column, the retaining ring is clamped in the negative pressure box, the external thread of the screw rod is connected with a nut, the nut is clamped on the negative pressure box, and the end of the screw rod away from the piston column is fixedly connected with a turning handle.

[0010] As a further solution of the present invention: the exhaust assembly includes an exhaust pipe, one end of the exhaust pipe is connected to the negative pressure box, the other end of the exhaust pipe is installed with a one-way valve, an air intake valve is provided between the one-way valve and the negative pressure box, and the top end of the air intake valve is connected to the exhaust pipe.

[0011] As a further solution of the present invention: the expansion sealing assembly includes two sealing frames, the interior of the sealing frames is hollow, one side of the sealing frames is connected to a branch pipe, the ends of the two branch pipes are connected to guide pipes, and the other side of the sealing frame is provided with a discharge valve.

[0012] As a further solution of the present invention: the bottom end of the guide tube is connected to a piston cylinder, the bottom end of the piston cylinder is fixed to the bottom of the through groove, a piston rod is provided in the piston cylinder, the top of the piston cylinder is embedded in the bottom of the installation groove, and the top end of the piston rod overlaps the bottom of the battery body.

[0013] As a further solution of the present invention: the limiting assembly includes an elastic pressure plate, which is overlapped on two battery bodies, a sliding sleeve is clamped in the middle of the elastic pressure plate, a screw is provided in the sliding sleeve, the screw passes through the elastic pressure plate, and the external thread of the screw is connected to a threaded cap, ear plates are respectively fixed on both sides of the elastic pressure plate, the ear plates are overlapped on one side of the battery body, and the two ear plates and the elastic pressure plate form a U-shaped structure.

[0014] As a further solution of the present invention: a heat dissipation cavity is opened in the middle of the shell, the negative pressure box is fixed to the bottom of the heat dissipation cavity, a horizontal plate is fixed in the heat dissipation cavity, the horizontal plate is fixedly connected to the bottom end of the screw, and a mounting bracket is installed on the back of the shell.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the present invention, by placing the battery body in the mounting groove in the shell, when the battery body squeezes the two piston rods, the piston rods will extend into the piston cylinder, and the gas inside the piston cylinder will be introduced into the two sealing frames through the guide tube and the two branch pipes. The sealing frame expands and is embedded in the sealing groove outside the battery body, so that the bottom of the battery body and the mounting groove are in a sealed state. As the battery body continues to move downward, the air inside the mounting groove is introduced into the negative pressure box through the air guide pipe in the groove. Because a one-way valve is provided on the exhaust pipe on the negative pressure box, the air in the negative pressure box is discharged through the one-way valve, and the one-way valve can block the outside air from entering the negative pressure box until the embedded plate at the bottom of the battery body is stuck in the groove. Because the gas will not flow back into the mounting groove through the negative pressure box and the air guide pipe, the battery body is sealed and connected with the sealing frame to achieve the purpose of double-layer negative pressure adsorption positioning of the battery body, and the traditional method of assembling the battery body with multiple groups of bolts is abandoned. While improving the assembly stability of the battery body, the battery body is prevented from loosening and being damaged by hard collision with the shell, thereby improving the safety of use.

[0017] 2. In the present invention, the screw rod is rotated by turning the handle to move the screw rod outside the nut, and the screw rod drives the piston rod to move in the negative pressure box through the bearing. Since the air inlet valve on the exhaust pipe is in a closed state, the one-way valve is set to prevent external gas from entering the negative pressure box. As the piston rod moves, the air remaining in the air guide pipe and the box body can be extracted, so that the embedded plate at the bottom of the battery body is tightly fitted in the groove in the box body. Therefore, the effect of negative pressure adsorption is improved by adjusting the negative pressure intensity, and the stability of the positioning of the battery body is further improved.

[0018] 3. In the present invention, by pulling up the elastic pressure plate and driving the sliding sleeve to rotate outside the screw rod, the elastic pressure plate drives the two ear plates to buckle on both sides of the two battery bodies, and tightening the threaded cap to squeeze the sliding sleeve so that the elastic pressure plate can be close to the top of the two battery bodies, thereby achieving the purpose of auxiliary positioning of the battery bodies, and the elastic pressure plate can give the battery bodies a certain buffering force, and improve the protection effect of the battery bodies by flexible limiting means. When removing the battery bodies, loosen the threaded cap, lift the elastic pressure plate and rotate it ninety degrees, so that the elastic pressure plate is located between the two battery bodies, which will not hinder the removal of the battery bodies, thereby improving the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the present invention from the rear;

[0021] Figure 3 It is a schematic structural diagram of a cross section of the present invention;

[0022] Figure 4It is a structural schematic diagram of the limit assembly of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the battery body of the present invention;

[0024] Figure 6 It is a schematic structural diagram of the expansion seal assembly of the present invention;

[0025] Figure 7 It is a structural schematic diagram of the connection between the negative pressure box and the adsorption component of the present invention;

[0026] Figure 8 It is a structural schematic diagram of the negative pressure regulating assembly of the present invention;

[0027] In the figure: 1, shell; 2, mounting groove; 3, battery body; 4, through groove; 5, adsorption assembly; 501, box body; 502, groove; 503, air guide tube; 6, negative pressure box; 7, negative pressure adjustment assembly; 701, screw rod; 702, bearing; 703, piston rod; 704, nut; 705, handle; 8, retaining ring; 9, exhaust assembly; 901, exhaust pipe; 902, one-way valve; 903, intake valve; 1 0. Through hole; 11. Embedded plate; 12. Expansion sealing assembly; 121. Sealing frame; 122. Branch pipe; 123. Guide pipe; 124. Piston cylinder; 125. Piston rod; 126. Discharge valve; 13. Sealing groove; 14. Limiting assembly; 141. Elastic pressure plate; 142. Sliding sleeve; 143. Threaded cap; 144. Screw; 145. Ear plate; 15. Heat dissipation cavity; 16. Horizontal plate; 17. Mounting bracket. DETAILED DESCRIPTION

[0028] The technical solution of the present application is further described in detail below in conjunction with specific implementation methods.

[0029] like Figure 1-8 As shown, the present invention provides a technical solution: a double-layer negative pressure adsorption positioning lithium battery assembly connection frame, comprising a shell 1, two sides of the top of the shell 1 are respectively provided with mounting grooves 2, a battery body 3 is installed in the mounting groove 2, two sides of the bottom of the shell 1 are respectively provided with through grooves 4, an adsorption component 5 is provided in the through groove 4, the adsorption component 5 comprises a box body 501, the box body 501 is clamped at the bottom of the mounting groove 2, the box body 501 is an arc-shaped design, and a groove 502 is opened in the box body 501, an embedded plate 11 is clamped in the groove 502, the bottom of the box body 501 is connected with two air guide tubes 503, the other ends of the two air guide tubes 503 are connected with the negative pressure box 6, because the air guide tubes 503 are provided, the air inside the mounting groove 2 is introduced into the negative pressure box 6 through the air guide tubes 503 in the groove 502, so as to discharge the air in the mounting groove 2;

[0030] The adsorption assembly 5 passes through the bottom of the shell 1 and is connected to the mounting groove 2. The same negative pressure box 6 is connected between the two adsorption assemblies 5. A negative pressure regulating assembly 7 is installed in the negative pressure box 6. The negative pressure regulating assembly 7 includes a screw rod 701. One end of the screw rod 701 is connected to a bearing 702. A piston column 703 is clamped on the bearing 702. The piston column 703 is arranged in the negative pressure box 6.

[0031] A retaining ring 8 is provided on one side of the piston column 703, and the retaining ring 8 is clamped in the negative pressure box 6. The external thread of the screw rod 701 is connected to a nut 704, and the nut 704 is clamped on the negative pressure box 6. The end of the screw rod 701 away from the piston column 703 is fixedly connected to a turning handle 705. Through the mutual cooperation between the screw rod 701 and the piston column 703, as the screw rod 701 drives the piston column 703 to move, the air remaining in the air guide tube 503 and the box body 501 can be extracted, so that the embedded plate 11 at the bottom of the battery body 3 fits tightly in the groove 502 in the box body 501, thereby improving the negative pressure adsorption effect.

[0032] The front of the negative pressure box 6 is connected to an exhaust assembly 9, which includes an exhaust pipe 901. One end of the exhaust pipe 901 is connected to the negative pressure box 6. A one-way valve 902 is installed at the other end of the exhaust pipe 901. An air intake valve 903 is provided between the one-way valve 902 and the negative pressure box 6. The top of the air intake valve 903 is connected to the exhaust pipe 901. Since the air intake valve 903 is provided, the air intake valve 903 on the exhaust pipe 901 is opened to allow external gas to enter the negative pressure box 6 through the air intake valve 903. The negative pressure box 6 introduces air into the box body 501 through the air guide pipe 503, thereby facilitating the release of the negative pressure adsorption state of the battery body 3.

[0033] The front and back sides of the housing 1 are respectively provided with through holes 10, and the ends of the negative pressure regulating component 7 and the ends of the exhaust component 9 are respectively arranged in the two through holes 10;

[0034] The bottom of the battery body 3 is fixedly connected with an embedded plate 11, which is snapped into the adsorption assembly 5. Two sets of sealing grooves 13 are opened outside the battery body 3, and the two sets of sealing grooves 13 are connected with an expansion sealing assembly 12. The bottom end of the expansion sealing assembly 12 is fixed to the bottom of the through groove 4. The expansion sealing assembly 12 includes two sealing frames 121. The interior of the sealing frame 121 is hollow. One side of the sealing frame 121 is connected with a branch pipe 122. The ends of the two branch pipes 122 are connected with a guide pipe 123. The other side of the sealing frame 121 is provided with a discharge valve 126. Since the discharge valve 126 is provided, the discharge valve 126 on one side of the sealing frame 121 is opened to discharge the air inside the sealing frame 121. At this time, the sealing frame 121 returns to its initial state, so that the battery body 3 can be separated from the sealing frame 121.

[0035] The bottom end of the guide tube 123 is connected to the piston cylinder 124, the bottom end of the piston cylinder 124 is fixed to the bottom of the through groove 4, a piston rod 125 is provided in the piston cylinder 124, the top of the piston cylinder 124 is embedded in the bottom of the mounting groove 2, and the top of the piston rod 125 overlaps the bottom of the battery body 3. Because of the piston rod 125, the air in the piston cylinder 124 can be discharged during the downward movement of the piston rod 125, so that the air is introduced into the sealing frame 121 through the guide tube 123 and the branch pipe 122.

[0036] A limiting assembly 14 is provided in the middle of the shell 1, and both sides of the limiting assembly 14 are overlapped with the tops of the two battery main bodies 3 respectively. The limiting assembly 14 includes an elastic pressing plate 141, and the elastic pressing plate 141 is overlapped on the two battery main bodies 3. A sliding sleeve 142 is clamped in the middle of the elastic pressing plate 141, and a screw 144 is provided in the sliding sleeve 142. The screw 144 penetrates the elastic pressing plate 141, and the screw 144 is externally threaded with a threaded cap 143. Ear plates 145 are fixed on both sides of the elastic pressing plate 141, respectively. The ear plate 145 is overlapped on one side of the battery main body 3, and the two ear plates 145 and the elastic pressing plate 141 form a U-shaped structure. Through the mutual cooperation between the elastic pressing plate 141 and the ear plate 145, the elastic pressing plate 141 can be close to the tops of the two battery main bodies 3. With the use of the two ear plates 145, the battery main body 3 can be auxiliary positioned, and the elastic pressing plate 141 can give the battery main body 3 a certain buffering force, thereby improving the protection effect of the battery main body 3.

[0037] A heat dissipation cavity 15 is provided in the middle of the shell 1, and the negative pressure box 6 is fixed to the bottom of the heat dissipation cavity 15. A horizontal plate 16 is fixed in the heat dissipation cavity 15, and the horizontal plate 16 is fixedly connected to the bottom end of the screw 144. A mounting bracket 17 is installed on the back of the shell 1. Due to the provision of the heat dissipation cavity 15, the contact area between the shell 1 and the outside air is increased, thereby accelerating the heat dissipation speed of the battery body 3.

[0038] The working principle of the present invention is:

[0039] When in use, by loosening the threaded cap 143, lift the elastic pressure plate 141 and rotate it ninety degrees, so that the elastic pressure plate 141 is located between the two battery bodies 3, and then open the exhaust valve 126 on one side of the sealing frame 121 to exhaust the air inside the sealing frame 121. At this time, the sealing frame 121 returns to its initial state, and then open the air inlet valve 903 on the exhaust pipe 901 to allow external air to enter the negative pressure box 6 through the air inlet valve 903. The negative pressure box 6 guides the air into the box body 501 through the air guide pipe 503, thereby releasing the negative pressure adsorption state of the battery body 3. When the battery body 3 is installed, the battery body 3 is placed in the installation groove 2 in the housing 1. When the battery body 3 squeezes the two piston rods 125, the gas inside the piston cylinder 124 is introduced into the two sealing frames 121 through the guide tube 123 and the two branch pipes 122. The sealing frame 121 expands and is embedded in the sealing groove 13 outside the battery body 3, so that the bottom of the battery body 3 and the installation groove 2 are in a sealed state. As the battery body 3 continues to move downward, the air inside the installation groove 2 passes through The air guide tube 503 in the groove 502 is introduced into the negative pressure box 6 until the embedded plate 11 at the bottom of the battery body 3 is stuck in the groove 502. Since the gas will not flow back into the mounting groove 2 through the negative pressure box 6 and the air guide tube 503, the purpose of double-layer negative pressure adsorption positioning of the battery body 3 is achieved. The handle 705 rotates the screw rod 701 to move the screw rod 701 outside the nut 704. The screw rod 701 drives the piston rod 703 to move in the negative pressure box 6 through the bearing 702. As the piston rod 703 moves, the air guide tube 503 and the box body 5 can be extracted. 01, so that the embedded plate 11 at the bottom of the battery body 3 fits tightly in the groove 502 in the box body 501, thereby improving the effect of negative pressure adsorption by adjusting the negative pressure strength, and then pulling up the elastic pressure plate 141 and driving the sliding sleeve 142 to rotate outside the screw 144, so that the elastic pressure plate 141 drives the two ear plates 145 to buckle on both sides of the two battery bodies 3, tighten the threaded cap 143 to squeeze the sliding sleeve 142, so that the elastic pressure plate 141 can fit tightly against the top of the two battery bodies 3, thereby assisting in positioning the battery bodies 3.

[0040] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one scheme", "some schemes", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the scheme or example are included in at least one scheme or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same scheme or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more schemes or examples in a suitable manner.

Claims

1. A double-layer negative pressure adsorption positioning lithium battery assembly connection frame, comprising a housing (1), characterized in that: The top of the shell (1) is provided with mounting grooves (2) on both sides, a battery body (3) is installed in the mounting grooves (2), the bottom of the shell (1) is provided with through grooves (4) on both sides, an adsorption assembly (5) is installed in the through grooves (4), the adsorption assembly (5) passes through the bottom of the shell (1) and is connected to the mounting grooves (2), a negative pressure box (6) is connected between the two adsorption assemblies (5), a negative pressure regulating assembly (7) is installed in the negative pressure box (6), the front of the negative pressure box (6) is connected to the exhaust assembly (9), the front and back of the shell (1) are provided with through holes (10), the end of the negative pressure regulating assembly (7) and the end of the exhaust assembly (9) are respectively arranged in the two through holes (10); The bottom of the battery body (3) is fixedly connected to an embedding plate (11), the embedding plate (11) is snap-fitted into the interior of the adsorption assembly (5), the battery body (3) is provided with two sets of sealing grooves (13), the two sets of sealing grooves (13) are connected to expansion sealing assemblies (12), the bottom end of the expansion sealing assembly (12) is fixed to the bottom of the through groove (4), the middle of the shell (1) is provided with a limit assembly (14), the two sides of the limit assembly (14) are respectively overlapped with the tops of the two battery bodies (3).

2. A double-layer negative pressure adsorption positioning lithium battery assembly connection frame according to claim 1, characterized in that: The adsorption assembly (5) comprises a box body (501), the box body (501) is snap-fitted to the bottom of the mounting groove (2), the box body (501) is arc-shaped, and a groove (502) is provided in the box body (501), the embedded plate (11) is snap-fitted into the groove (502), and the bottom of the box body (501) is connected to two air guide tubes (503), and the other ends of the two air guide tubes (503) are connected to the negative pressure box (6).

3. The double-layer negative pressure adsorption positioning lithium battery assembly connection frame according to claim 1, characterized in that: The negative pressure regulating assembly (7) comprises a screw rod (701), one end of which is connected to a bearing (702), a piston column (703) is clamped on the bearing (702), and the piston column (703) is arranged in the negative pressure box (6).

4. A double-layer negative pressure adsorption positioning lithium battery assembly connection frame according to claim 3, characterized in that: A retaining ring (8) is provided on one side of the piston column (703), and the retaining ring (8) is clamped in the negative pressure box (6). The screw rod (701) is externally threadedly connected to a nut (704), and the nut (704) is clamped on the negative pressure box (6). The end of the screw rod (701) away from the piston column (703) is fixedly connected to a rotating handle (705).

5. The double-layer negative pressure adsorption positioning lithium battery assembly connection frame according to claim 1, characterized in that: The exhaust assembly (9) comprises an exhaust pipe (901), one end of the exhaust pipe (901) is connected to the negative pressure box (6), the other end of the exhaust pipe (901) is installed with a one-way valve (902), an air intake valve (903) is provided between the one-way valve (902) and the negative pressure box (6), and the top end of the air intake valve (903) is connected to the exhaust pipe (901).

6. The double-layer negative pressure adsorption positioning lithium battery assembly connection frame according to claim 1, characterized in that: The expansion sealing assembly (12) comprises two sealing frames (121), the interior of the sealing frames (121) is hollow, one side of the sealing frames (121) is connected to a branch pipe (122), the ends of the two branch pipes (122) are connected to a flow guide pipe (123), and the other side of the sealing frame (121) is provided with a discharge valve (126).

7. A double-layer negative pressure adsorption positioning lithium battery assembly connection frame according to claim 6, characterized in that: The bottom end of the guide tube (123) is connected to a piston cylinder (124), the bottom end of the piston cylinder (124) is fixed to the bottom of the through groove (4), a piston rod (125) is arranged in the piston cylinder (124), the top of the piston cylinder (124) is embedded in the bottom of the installation groove (2), and the top end of the piston rod (125) overlaps the bottom of the battery body (3).

8. The double-layer negative pressure adsorption positioning lithium battery assembly connection frame according to claim 1, characterized in that: The limiting assembly (14) comprises an elastic pressure plate (141), the elastic pressure plate (141) is overlapped on two battery bodies (3), a sliding sleeve (142) is clamped in the middle of the elastic pressure plate (141), a screw (144) is arranged in the sliding sleeve (142), the screw (144) passes through the elastic pressure plate (141), and the screw (144) is externally threadedly connected to a threaded cap (143), ear plates (145) are respectively fixed on both sides of the elastic pressure plate (141), the ear plates (145) are overlapped on one side of the battery body (3), and the two ear plates (145) and the elastic pressure plate (141) form a U-shaped structure.

9. The double-layer negative pressure adsorption positioning lithium battery assembly connection frame according to claim 8, characterized in that: A heat dissipation cavity (15) is provided in the middle of the shell (1), the negative pressure box (6) is fixed to the bottom of the heat dissipation cavity (15), a horizontal plate (16) is fixed in the heat dissipation cavity (15), the horizontal plate (16) is fixedly connected to the bottom end of the screw rod (144), and a mounting bracket (17) is installed on the back of the shell (1).

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