Box-type lithium battery pack structure

Abstract

The utility model discloses a box-type lithium battery pack structure, and aims to provide a box-type lithium battery pack structure which is favorable for improving the qualified rate of products and comprises a battery shell, the lithium battery pack is mounted in the battery shell; the electrode terminal is detachably connected with the battery shell, a locking piece is detachably connected to the electrode terminal, one end of the electrode terminal is located in the battery shell, the other end of the electrode terminal is located outside the battery shell, a cable is arranged on the lithium battery pack, and the lithium battery pack is inserted into the end, located in the battery shell, of the electrode terminal through the cable. After being fixed by the locking piece, the electrode is electrically connected with the electrode terminal; and the communication acquisition terminal is detachably connected with the battery shell and is electrically connected with the lithium battery pack. The battery fixing device has the beneficial effects that tin soldering is replaced by a locking and fixing mode of the locking piece, so that various bad problems caused by the tin soldering are avoided, the quality of the battery is favorably improved, and the purpose of favorably improving the product percent of pass is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery pack related technical field, especially point to a box type lithium battery pack structure. BACKGROUND

[0002] The box type lithium battery pack is the battery system that a plurality of lithium battery monomer is combined in a box body. It has wide application in multiple fields: energy storage field, such as 1.5MWh container type large energy storage system, can be used for the conversion, storage and discharge of renewable energy such as hydroelectricity, wind power, solar energy, is compared as a large power bank by the industry; Marine field, marine box type power lithium battery module is used as a kind of efficient, reliable and lightweight power supply solution, can improve the efficiency and stability of marine power system, applicable to various complex marine environments;New energy vehicle field: there is lithium battery PACK combination box structure for new energy vehicle, provides power for automobile.

[0003] In the prior art, the electrode terminal at the shell of the box type lithium battery pack is usually fixedly connected by tin soldering, and metal chips will be generated by welding, which will cause battery short circuit, in addition, welding defects will have black explosion point and other appearance defects, and heating will cause tin to melt and make the welding point to be separated, which reduces the qualified rate after welding, and welding is carried out in the shell, especially for thicker cable, which is inconvenient to operate. UTILITY MODEL CONTENTS

[0004] The utility model discloses to overcome the deficiency that the electrode terminal and cable tin soldering make the product qualified rate reduce in the prior art, and provide a box type lithium battery pack structure beneficial to improve product qualified rate.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A box type lithium battery pack structure, it includes:

[0007] Battery shell;

[0008] Lithium battery pack, is installed in the battery shell;

[0009] Electrode terminal is detachably connected with the battery shell, the detachable locking piece is connected on the electrode terminal, one end of the electrode terminal is located in the battery shell, the other end of the electrode terminal is located outside the battery shell, the cable is arranged on the lithium battery pack, the lithium battery pack is inserted into one end of the electrode terminal in the battery shell through the cable, and then is electrically connected with the electrode terminal after being fixed through the locking piece;

[0010] Communication acquisition terminal is detachably connected with the battery shell, and is electrically connected with the lithium battery pack.

[0011] The lithium battery pack is inserted into the end of the electrode terminal through the cable, and the cable is locked by the locking member to be fixed in the electrode terminal while being electrically connected with the electrode terminal, so that the tin soldering is replaced by the locking member locking, various problems caused by the tin soldering are avoided, the battery quality is improved, the product qualified rate is improved, and the fixing operation convenience of the electrode terminal and the cable is improved.

[0012] As preferred, the cable comprises an insulating sheath and a plurality of conductive wires, the plurality of conductive wires are fixed in the insulating sheath, one end of the conductive wire is electrically connected with the lithium battery pack, the other end of the conductive wire extends out of the insulating sheath, and the cable is inserted into one end of the electrode terminal in the battery shell, and then the locking member is used to press the other end of the plurality of conductive wires outside the insulating sheath to be fixed and electrically connected with the electrode terminal. The conductive wire extending out of the insulating sheath is fixed in the electrode terminal and electrically connected with the electrode terminal by the locking member, so that in the utility model, the fixing of the cable and the electrode terminal only needs to assemble the cable and the electrode terminal in place, and then lock by the locking member, which is convenient to operate and beneficial to installation and disassembly, and convenient to maintain.

[0013] As preferred, one end of the electrode terminal in the battery shell is provided with a limiting groove matched with the end of the insulating sheath, the bottom center of the limiting groove is provided with a plug hole matched with the plurality of conductive wires, the electrode terminal is provided with a locking cavity, one end of the locking cavity is communicated with the plug hole, the other end of the locking cavity is provided with a threaded hole matched with the locking member in the center, one end of the electrode terminal outside the battery shell is provided with a connecting groove, the threaded hole is located in the bottom center of the connecting groove, the locking member is screwed with the threaded hole, the outer diameter of the locking member is greater than the inner diameter of the plug hole and less than the inner diameter of the locking cavity, and after the cable is inserted into one end of the electrode terminal in the battery shell, the end of the cable is limited in the limiting groove by the insulating sheath, and the plurality of conductive wires are screwed inwards by the locking member after penetrating the plug hole, the plurality of conductive wires are dispersed around the locking member and are pressed and fixed on the side wall of one end of the locking cavity communicated with the plug hole and are electrically connected with the electrode terminal, and the opening end of the limiting groove and the opening end of the connecting groove are respectively located on the two end faces of the electrode terminal. In the initial state, the plurality of conductive wires are in a bundle shape, and when the cable is connected with the electrode terminal, the plurality of conductive wires are sequentially penetrated into the locking cavity after penetrating the limiting groove and the plug hole, at this time, the insulating sheath is limited in the limiting groove, so that the conductive wire is not exposed, which is beneficial to improve the safety performance and the service life of the conductive wire; then the operator screws the locking member inwards at the connecting groove end, and the conductive wire in the locking cavity is pressed and fixed on the side wall of one end of the locking cavity communicated with the plug hole, which is convenient and fast to operate.

[0014] Preferably, the end face of the locking cavity connected to the insertion hole is shaped like a flared mouth opening outward from the insertion hole towards the threaded hole. One end of the locking member is located inside the locking cavity and its edge is provided with a guide slope. The guide slope matches and fits the flared end face of the locking cavity. Several conductive metal wires are pressed and fixed to the side wall of the end of the locking cavity connected to the insertion hole by the guide slope under the drive of the locking member and are electrically connected to the electrode terminal. The other end of the locking member is located inside the bottom of the connecting groove and is provided with a cross groove. The operator uses a tool to insert the locking element into the cross groove of the connecting slot and tightens it inward. The locking element is inserted into the center of a bundle of conductive metal wires through a guide bevel, dispersing the conductive metal wires in all directions and pressing them firmly against the end face of the funnel-shaped locking cavity. Therefore, the design of the guide bevel facilitates both the dispersion of the conductive metal wires and the pressing of the dispersed conductive metal wires against the end face of the locking cavity, ensuring a tight fit and fixation while preventing scratches on the surface of the conductive metal wires. This provides better protection for the conductive metal wires and helps extend their service life. The connecting slot is used for connecting external circuits.

[0015] Preferably, the electrode terminal includes a mounting base and a conductive metal body. The mounting base is an insulator. The side wall of the battery casing has a mounting hole that matches the mounting base. The mounting base is located inside the mounting hole and is detachably connected to the mounting hole. The center of the mounting base has a through hole that matches the conductive metal body. The conductive metal body is located inside the through hole and is fixedly connected to the mounting base through the through hole. One end of the conductive metal body is located inside the battery casing, and the other end of the conductive metal body is located outside the battery casing. The limiting groove is located at one end of the conductive metal body, and the connecting groove is located at the other end of the conductive metal body. The locking cavity and the locking element are both located inside the conductive metal body. Several conductive metal wires are pressed and fixed to the side wall of the locking cavity that is connected to the insertion hole by the guide slope under the drive of the locking element and are electrically connected to the conductive metal body. The mounting base is an insulator, which helps prevent the battery casing from becoming charged and improves safety. The limiting groove, connecting groove, locking cavity, and locking element are all located on the conductive metal body. This allows the locking element to press and fix several conductive metal wires to the end face of the locking cavity, while simultaneously fixing and electrically connecting the cable to the electrode terminal, and electrically connecting to the external circuit through the connecting groove.

[0016] Preferably, the mounting base has fixing holes at both ends, and bolts are installed in the fixing holes. The mounting base is threadedly connected to the battery casing via bolts. The conductive metal body is detachably connected to the battery casing via the mounting base, further improving the convenience of electrode terminal maintenance.

[0017] Preferably, the communication acquisition terminal includes an insulating sleeve. The battery casing has mounting holes that match the insulating sleeve. The insulating sleeve is located within and detachably connected to the mounting holes. A conductor is disposed within the insulating sleeve and is fixedly connected to the insulating sleeve. One end of the conductor is located inside the battery casing and electrically connected to the lithium battery pack, while the other end of the conductor is located outside the battery casing. The end of the conductor located outside the battery casing facilitates connection to external circuitry. The detachable connection between the communication acquisition terminal and the battery casing via the insulating sleeve helps prevent the battery casing from becoming electrified, improving safety. Furthermore, it facilitates maintenance and replacement of the communication acquisition terminal.

[0018] Preferably, one end of the insulating sleeve is located outside the assembly hole and fits against the outer wall of the battery casing, which facilitates sealing the assembly hole and improves the sealing performance at the assembly hole. The other end of the insulating sleeve passes through the assembly hole and is located inside the battery casing. The shape of the insulating sleeve passing through the assembly hole is polygonal and the same as the shape of the assembly hole. Several positioning pieces are integrally formed on the outer wall of the insulating sleeve. The positioning pieces are evenly distributed along the circumference of the insulating sleeve. The positioning pieces open outward from one end to the other end in an inclined shape. One end of the positioning piece is located inside the battery casing and is elastically connected to the side wall of the insulating sleeve. An movable gap is formed between the other end of the positioning piece and the outer wall of the insulating sleeve. The other end of the positioning piece is squeezed by the inner side wall of the assembly hole and approaches the insulating sleeve, thereby fixing the insulating sleeve to the assembly hole. When the communication acquisition terminal is installed onto the battery casing, the operator only needs to insert the insulating sleeve into the mounting hole from the outside of the battery casing. Several positioning pieces are squeezed inward by the side wall of the mounting hole and elastically contract, so that the communication acquisition terminal is positioned by being locked in the mounting hole by the positioning pieces. The operation is convenient and quick. The shape of the insulating sleeve through the mounting hole is polygonal and the same as the shape of the mounting hole, which helps to prevent the communication acquisition terminal from rotating when connected to the external line and improves the stability of the connection structure.

[0019] Preferably, the outer wall of the insulating sleeve has several grooves that match a number of positioning pieces. One end of each positioning piece is integrally formed with one end of a groove and is on the same plane as the opening end of the groove. The movable gap is formed by the other end of the positioning piece, the bottom of the other end of the groove, and the opening end. This design improves the fit between the insulating sleeve and the mounting hole, reduces the assembly gap between them, and thus improves the sealing effect.

[0020] Preferably, the electrode terminals, negative terminal, and communication acquisition terminal are all mounted on the same side of the battery casing, which facilitates the connection of external lines. A handle is rotatably connected to the side wall of the battery casing to facilitate the handling of the box-type lithium battery.

[0021] The beneficial effects of this utility model are:

[0022] 1. The use of locking components to fix the battery instead of soldering avoids various problems caused by soldering, thereby improving battery quality and increasing the product qualification rate. At the same time, it improves the convenience of fixing the electrode terminals and cables.

[0023] 2. The design of the guide slope on the locking component is beneficial in two ways: firstly, it facilitates the spreading of several conductive metal wires; secondly, it facilitates pressing the spread conductive metal wires tightly against the end face of the locking cavity, so that they are tightly fitted and fixed to the end face of the locking cavity, while preventing scratches on the surface of the conductive metal wires, thus providing better protection for the conductive metal wires and helping to extend their service life.

[0024] 3. When the communication acquisition terminal is installed on the battery casing, the operator only needs to insert the insulating sleeve into the mounting hole from the outside of the battery casing. Several positioning pieces are squeezed inward by the side wall of the mounting hole and elastically contract, so that the communication acquisition terminal is positioned by being locked in the mounting hole by the positioning pieces. The operation is convenient and quick. The shape of the insulating sleeve through the mounting hole is polygonal and the same as the shape of the mounting hole, which helps to prevent the communication acquisition terminal from rotating when connected to the external line and improves the stability of the connection structure. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0027] Figure 3 and Figure 4 These are all schematic diagrams of the electrode terminals;

[0028] Figure 5 yes Figure 4 Sectional view of AA;

[0029] Figure 6 This is a schematic diagram of the communication acquisition terminal.

[0030] In the diagram: 1. Battery casing, 2. Lithium battery pack, 3. Electrode terminals, 4. Locking element, 5. Cable, 6. Communication acquisition terminal, 7. Insulating outer sheath, 8. Conductive metal wire, 9. Limiting groove, 10. Insertion hole, 11. Locking cavity, 12. Threaded hole, 13. Connecting groove, 14. Guide slope, 15. Cross groove, 16. Mounting base, 17. Conductive metal body, 18. Fixing hole, 19. Bolt, 20. Insulating sleeve, 21. Conductor, 22. Positioning piece, 23. Movement gap, 24. Groove, 25. Handle. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of components illustrated in these embodiments do not limit the scope of this application. For ease of illustration, spatial relative terms such as “upper,” “lower,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “below” other elements or features would be fixed “upper” to other elements or features. Thus, the exemplary term “lower” can include both upper and lower orientations. The device may be fixed in other ways (rotated 90 degrees or located in other orientations), and the spatial relative descriptions used herein can be interpreted accordingly. It should also be understood that, for ease of description, the dimensions of the various parts shown in the figures are not drawn to actual scale. Techniques, processes, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, processes, and equipment should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be discussed further in subsequent figures.

[0034] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0035] like Figure 1 , Figure 2 , Figure 3 and Figure 4 In the described embodiment, a box-type lithium battery pack structure includes a battery casing 1; a lithium battery pack 2 installed inside the battery casing 1; electrode terminals 3 detachably connected to the battery casing 1, with locking members 4 detachably connected to the electrode terminals 3; one end of the electrode terminals 3 located inside the battery casing 1, and the other end of the electrode terminals 3 located outside the battery casing 1; a cable 5 is provided on the lithium battery pack 2; the lithium battery pack 2 is inserted into the end of the electrode terminals 3 located inside the battery casing 1 via the cable 5, and then fixed by the locking members 4 to be electrically connected to the electrode terminals 3; and a communication acquisition terminal 6 detachably connected to the battery casing 1 and electrically connected to the lithium battery pack 2.

[0036] like Figure 3 , Figure 4 and Figure 5 As shown, the cable 5 includes an insulating outer sheath 7 and several conductive metal wires 8. The conductive metal wires 8 are all wrapped and fixed inside the insulating outer sheath 7. One end of the conductive metal wires 8 is electrically connected to the lithium battery pack 2, and the other end of the conductive metal wires 8 extends outward from the end of the insulating outer sheath 7. After the cable 5 is inserted into the end of the electrode terminal 3 located inside the battery casing 1, the locking member 4 presses the end of the several conductive metal wires 8 located outside the insulating outer sheath 7 to fix and electrically connect them to the electrode terminal 3.

[0037] The electrode terminal 3, located inside the battery casing 1, has a limiting groove 9 that matches the end of the insulating outer sheath 7. The bottom center of the limiting groove 9 has an insertion hole 10 that matches several conductive metal wires 8. The electrode terminal 3 has a locking cavity 11, one end of which is connected to the insertion hole 10. The other end of the locking cavity 11 has a threaded hole 12 that matches the locking member 4. The electrode terminal 3, located outside the battery casing 1, has a connecting groove 13. The threaded hole 12 is located at the bottom center of the connecting groove 13. The locking member 4 is threadedly connected to the threaded hole 12. The outer diameter is larger than the inner diameter of the socket 10 and smaller than the inner diameter of the locking cavity 11. After the cable 5 is inserted into the electrode terminal 3 at one end located inside the battery casing 1, its end is limited in the limiting groove 9 by the insulating outer sheath 7. Several conductive metal wires 8 pass through the socket 10 and are tightened inward by the locking member 4. Several conductive metal wires 8 are dispersed around the locking member 4 and pressed and fixed on the side wall of the locking cavity 11 that is connected to the socket 10 and electrically connected to the electrode terminal 3. The opening end of the limiting groove 9 and the opening end of the connecting groove 13 are located on the two end faces of the electrode terminal 3, respectively.

[0038] The end face of the locking cavity 11 connected to the insertion hole 10 is shaped like a flared mouth opening outward from the insertion hole 10 toward the threaded hole 12. One end of the locking member 4 is located inside the locking cavity 11 and its edge is provided with a guide slope 14. The guide slope 14 matches and fits the flared end face of the locking cavity 11. Several conductive metal wires 8 are pressed and fixed to the side wall of the locking cavity 11 connected to the insertion hole 10 by the guide slope 14 under the drive of the locking member 4 and are electrically connected to the electrode terminal 3. The other end of the locking member 4 is located in the bottom of the connecting groove 13 and is provided with a cross groove 15.

[0039] The electrode terminal 3 includes a mounting base 16 and a conductive metal body 17. The mounting base 16 is an insulator. The side wall of the battery casing 1 is provided with a mounting hole that matches the mounting base 16. The mounting base 16 is located in the mounting hole and is detachably connected to the mounting hole. The center of the mounting base 16 is provided with a through hole that matches the conductive metal body 17. The conductive metal body 17 is located in the through hole and is fixedly connected to the mounting base 16 through the through hole. One end of the conductive metal body 17 is located inside the battery casing 1, and the other end of the conductive metal body 17 is located outside the battery casing 1. The limiting groove 9 is located at one end of the conductive metal body 17, and the connecting groove 13 is located at the other end of the conductive metal body 17. The locking cavity 11 and the locking member 4 are both located inside the conductive metal body 17. Several conductive metal wires 8 are pressed and fixed to the side wall of the locking cavity 11 that is connected to the insertion hole 10 by the guide inclined surface 14 under the drive of the locking member 4 and are electrically connected to the conductive metal body 17.

[0040] Mounting base 16 has fixing holes 18 at both ends, and bolts 19 are installed in the fixing holes 18. Mounting base 16 is threadedly connected to battery casing 1 by bolts 19.

[0041] like Figure 6 As shown, the communication acquisition terminal 6 includes an insulating sleeve 20. The battery casing 1 has an assembly hole that matches the insulating sleeve 20. The insulating sleeve 20 is located inside the assembly hole and is detachably connected to the assembly hole. A conductor 21 is provided inside the insulating sleeve 20. The conductor 21 is fixedly connected to the insulating sleeve 20. One end of the conductor 21 is located inside the battery casing 1 and is electrically connected to the lithium battery pack 2. The other end of the conductor 21 is located outside the battery casing 1.

[0042] One end of the insulating sleeve 20 is located outside the mounting hole and fits against the outer side wall of the battery casing 1. The other end of the insulating sleeve 20 passes through the mounting hole and is located inside the battery casing 1. The shape of the insulating sleeve 20 passing through the mounting hole is polygonal and the same as the shape of the mounting hole. Several positioning pieces 22 are integrally formed on the outer side wall of the insulating sleeve 20. The positioning pieces 22 are evenly distributed along the circumference of the insulating sleeve 20. The positioning pieces 22 open outward from one end to the other end in an inclined shape. One end of the positioning piece 22 is located inside the battery casing 1 and is elastically connected to the side wall of the insulating sleeve 20. The other end of the positioning piece 22 forms an movable gap 23 between itself and the outer side wall of the insulating sleeve 20. The other end of the positioning piece 22 is squeezed by the inner side wall of the mounting hole and approaches the insulating sleeve 20, thereby fixing the insulating sleeve 20 to the mounting hole.

[0043] The outer wall of the insulating sleeve 20 has several grooves 24 that match the positioning pieces 22 one by one. One end of the positioning piece 22 is integrally formed with one end of the groove 24 and is on the same plane as the opening end face of the groove 24. The movable gap 23 is formed by the other end of the positioning piece 22 and the bottom and opening end of the other end of the groove 24 respectively.

[0044] like Figure 1 and Figure 2 As shown, electrode terminal 3, negative terminal and communication acquisition terminal 6 are all mounted on the same side of battery casing 1, and a handle 25 is rotatably connected to the side wall of battery casing 1.

[0045] In the first embodiment, several conductive metal wires 8 are bundled together in the initial state. When the lithium battery pack 2 is connected to the electrode terminal 3 via the cable 5, the several conductive metal wires 8 pass through the limiting groove 9 and the insertion hole 10 in sequence and are located in the locking cavity 11. At this time, the insulating outer sheath 7 is limited to the limiting groove 9 to prevent the conductive metal wires 8 from being exposed, which is beneficial to improving safety performance and the service life of the conductive metal wires 8. Then, the operator inserts a tool into the cross groove 15 of the locking member 4 at the end of the connecting groove 13 and tightens the locking member 4 inward. The locking member 4 is inserted into the center of the bundle of several conductive metal wires 8 through the guide inclined surface 14, which disperses the several conductive metal wires 8 to the surrounding area and presses and fixes them on the end face of the flared locking cavity 11. At the same time, the cable 5 is fixed and electrically connected to the electrode terminal 3, and electrically connected to the external circuit through the connecting groove 13 is realized.

[0046] In Example 2, when the communication acquisition terminal 6 is installed onto the battery casing 1, the operator only needs to insert the insulating sleeve 20 into the mounting hole from the outside of the battery casing 1. Several positioning pieces 22, compressed by the sidewalls of the mounting hole, elastically contract inwards, thereby positioning the communication acquisition terminal 6 within the mounting hole by being secured by the positioning pieces 22. This operation is convenient and quick. The insulating sleeve 20, with its polygonal shape at the point of penetration through the mounting hole and matching the shape of the mounting hole, helps prevent rotation of the communication acquisition terminal 6 when connected to external lines, improving the stability of the connection structure. Finally, the lithium battery pack 2 inside the battery casing 1 is fixed to the communication acquisition terminal 6 via corresponding signal lines.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A box-type lithium battery pack structure, characterized in that, include: Battery casing (1); A lithium battery pack (2) is installed inside the battery casing (1); The electrode terminal (3) is detachably connected to the battery casing (1). A locking member (4) is detachably connected to the electrode terminal (3). One end of the electrode terminal (3) is located inside the battery casing (1), and the other end of the electrode terminal (3) is located outside the battery casing (1). The lithium battery pack (2) is provided with a cable (5). The lithium battery pack (2) is inserted into the end of the electrode terminal (3) located inside the battery casing (1) through the cable (5), and then fixed by the locking member (4) and electrically connected to the electrode terminal (3). The communication acquisition terminal (6) is detachably connected to the battery casing (1) and electrically connected to the lithium battery pack (2).

2. The box-type lithium battery pack structure according to claim 1, characterized in that, The cable (5) includes an insulating outer sheath (7) and several conductive metal wires (8). The several conductive metal wires (8) are all wrapped and fixed inside the insulating outer sheath (7). One end of the conductive metal wire (8) is electrically connected to the lithium battery pack (2). The other end of the conductive metal wire (8) extends outward from the end of the insulating outer sheath (7) to the outside of the insulating outer sheath (7). After the cable (5) is inserted into the end of the electrode terminal (3) located inside the battery casing (1), the end of the several conductive metal wires (8) located outside the insulating outer sheath (7) is pressed by the locking member (4) to make a fixed connection and electrical connection with the electrode terminal (3).

3. The box-type lithium battery pack structure according to claim 2, characterized in that, The electrode terminal (3) located inside the battery casing (1) has a limiting groove (9) that matches the end of the insulating outer sheath (7). The bottom center of the limiting groove (9) has a socket (10) that matches several conductive metal wires (8). The electrode terminal (3) has a locking cavity (11). One end of the locking cavity (11) is connected to the socket (10). The other end of the locking cavity (11) has a threaded hole (12) that matches the locking member (4). The electrode terminal (3) located outside the battery casing (1) has a connecting groove (13). The threaded hole (12) is located at the bottom center of the connecting groove (13). The locking member (4) is threadedly connected to the threaded hole (12). Next, the outer diameter of the locking member (4) is larger than the inner diameter of the socket (10) and smaller than the inner diameter of the locking cavity (11). After the cable (5) is inserted into one end of the electrode terminal (3) located inside the battery shell (1), its end is limited in the limiting groove (9) by the insulating outer sheath (7). Several conductive metal wires (8) pass through the socket (10) and are tightened inward by the locking member (4). Several conductive metal wires (8) are dispersed around the locking member (4) and pressed and fixed on the side wall of the locking cavity (11) connected to the socket (10) and electrically connected to the electrode terminal (3). The opening end of the limiting groove (9) and the opening end of the connecting groove (13) are located on the two end faces of the electrode terminal (3) respectively.

4. The box-type lithium battery pack structure according to claim 3, characterized in that, The end face of the locking cavity (11) connected to the insertion hole (10) is shaped like a flared mouth opening outward from the insertion hole (10) toward the threaded hole (12). One end of the locking member (4) is located inside the locking cavity (11) and its edge is provided with a guide slope (14). The guide slope (14) matches and fits the flared end face of the locking cavity (11). Several conductive metal wires (8) are pressed and fixed to the side wall of the end connected to the locking cavity (11) and the insertion hole (10) by the guide slope (14) under the drive of the locking member (4) and are electrically connected to the electrode terminal (3). The other end of the locking member (4) is located inside the bottom of the connecting groove (13) and is provided with a cross groove (15).

5. A box-type lithium battery pack structure according to claim 3 or 4, characterized in that, The electrode terminal (3) includes a mounting base (16) and a conductive metal body (17). The mounting base (16) is an insulator. The side wall of the battery casing (1) is provided with a mounting hole that matches the mounting base (16). The mounting base (16) is located in the mounting hole and is detachably connected to the mounting hole. The center of the mounting base (16) is provided with a through hole that matches the conductive metal body (17). The conductive metal body (17) is located in the through hole and is fixedly connected to the mounting base (16) through the through hole. One end of the conductive metal body (17) is located on the battery casing. (1) Inside, the other end of the conductive metal body (17) is located outside the battery casing (1), the limiting groove (9) is located at one end of the conductive metal body (17), the connecting groove (13) is located at the other end of the conductive metal body (17), the locking cavity (11) and the locking member (4) are both located inside the conductive metal body (17), and several conductive metal wires (8) are pressed and fixed to the side wall of the locking cavity (11) connected to the insertion hole (10) by the guide inclined surface (14) under the drive of the locking member (4) and are electrically connected to the conductive metal body (17).

6. The box-type lithium battery pack structure according to claim 5, characterized in that, The mounting base (16) has fixing holes (18) at both ends. Bolts (19) are installed in the fixing holes (18). The mounting base (16) is threadedly connected to the battery casing (1) by the bolts (19).

7. The box-type lithium battery pack structure according to claim 1, characterized in that, The communication acquisition terminal (6) includes an insulating sleeve (20). The battery casing (1) is provided with an assembly hole that matches the insulating sleeve (20). The insulating sleeve (20) is located inside the assembly hole and is detachably connected to the assembly hole. A conductor (21) is provided inside the insulating sleeve (20). The conductor (21) is fixedly connected to the insulating sleeve (20). One end of the conductor (21) is located inside the battery casing (1) and is electrically connected to the lithium battery pack (2). The other end of the conductor (21) is located outside the battery casing (1).

8. The box-type lithium battery pack structure according to claim 7, characterized in that, One end of the insulating sleeve (20) is located outside the assembly hole and fits against the outer wall of the battery casing (1). The other end of the insulating sleeve (20) passes through the assembly hole and is located inside the battery casing (1). The shape of the insulating sleeve (20) passing through the assembly hole is polygonal and the same as the shape of the assembly hole. Several positioning pieces (22) are integrally formed on the outer wall of the insulating sleeve (20). The positioning pieces (22) are evenly distributed along the circumference of the insulating sleeve (20). The positioning pieces (22) open outward from one end to the other end in an inclined shape. One end of the positioning piece (22) is located inside the battery casing (1) and is elastically connected to the side wall of the insulating sleeve (20). The other end of the positioning piece (22) forms an movable gap (23) between it and the outer wall of the insulating sleeve (20). The other end of the positioning piece (22) is squeezed by the inner side wall of the assembly hole and approaches the insulating sleeve (20), thereby fixing the insulating sleeve (20) to the assembly hole.

9. A box-type lithium battery pack structure according to claim 8, characterized in that, The outer wall of the insulating sleeve (20) is provided with a number of grooves (24) that match a number of positioning pieces (22). One end of the positioning piece (22) is integrally formed with one end of the groove (24) and is on the same plane as the opening end face of the groove (24). The movable gap (23) is formed by the other end of the positioning piece (22) together with the bottom and opening end of the other end of the groove (24).

10. A box-type lithium battery pack structure according to claim 1, characterized in that, The electrode terminal (3), negative terminal and communication acquisition terminal (6) are all installed on the same side of the battery casing (1), and a handle (25) is rotatably connected to the side wall of the battery casing (1).

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