A lithium battery cell and a lithium battery pack containing the lithium battery cell

Abstract

The present invention relates to a lithium battery cell, characterized in that the lithium battery cell comprises a lithium battery, a bimetallic strip, a first insulating strip, a second insulating strip and an elastic strip, the first insulating strip and the second insulating strip are respectively arranged at the two ends of the lithium battery, the bimetallic strip and the elastic strip are respectively arranged at the two ends of the lithium battery, the first insulating strip is arranged between the lithium battery and the bimetallic strip, and the first insulating strip is provided with a first through hole for the bimetallic strip to extend toward the lithium battery, the second insulating strip is arranged between the lithium battery and the elastic strip, and the second insulating strip is provided with a second through hole for the elastic strip to collide with the lithium battery. Using the above technical solution, the present invention provides a lithium battery cell, the lithium battery cell is provided with a bimetallic strip, when the lithium battery is short-circuited, the bimetallic strip is automatically disconnected from the lithium battery, plays a protective role, and prevents the lithium battery from exploding.

Description

Technical Field

[0001] The present invention relates to the field of lithium batteries, and in particular to a lithium battery cell and a lithium battery pack comprising the lithium battery cell. Background Art

[0002] Lithium batteries are a type of battery that uses lithium metal as the positive / negative electrode material and a non-aqueous electrolyte solution. Due to the very active chemical properties of lithium metal, the processing, storage, and use of lithium metal have very high environmental requirements. With the development of science and technology, lithium batteries have now become mainstream.

[0003] Electric vehicles have become a widely used means of transportation for people's daily commuting. The power source of existing electric vehicles is lithium batteries, and multiple lithium batteries are connected in series or parallel to form a lithium battery pack. The internal parts of the grouped batteries are prone to extrusion, vibration, high temperature and even short circuit, which can cause the batteries to heat up, smoke, catch fire and even explode. If a lithium battery in the grouped lithium battery pack is damaged, the entire battery pack will be damaged, resulting in property loss. Even when a lithium battery is used alone, short circuits and other phenomena may occur, causing damage to the battery or even explosion, causing property loss and personal threats to users. Summary of the invention

[0004] Purpose of the present invention: In order to overcome the defects of the prior art, the present invention provides a lithium battery cell, on which a bimetallic strip is provided. When a short circuit occurs in the lithium battery, the bimetallic strip is automatically disconnected from the lithium battery to play a protective role and prevent the lithium battery from exploding.

[0005] The technical solution of the present invention: a lithium battery cell, characterized in that the lithium battery cell includes a lithium battery, a bimetallic sheet, a first insulating sheet, a second insulating sheet and an elastic sheet, the first insulating sheet and the second insulating sheet are respectively arranged at the two ends of the lithium battery, the bimetallic sheet and the elastic sheet are respectively arranged at the two ends of the lithium battery, the first insulating sheet is arranged between the lithium battery and the bimetallic sheet, and the first insulating sheet is provided with a first through hole for the bimetallic sheet to extend toward the lithium battery, the second insulating sheet is arranged between the lithium battery and the elastic sheet, and the second insulating sheet is provided with a second through hole for the elastic sheet to conflict with the lithium battery.

[0006] By adopting the above technical solution, a bimetallic strip is provided on the lithium battery cell. Under normal use, the bimetallic strip contacts the lithium battery to connect the circuit. When the circuit is short-circuited or under high temperature, the bimetallic strip will automatically pop open and separate from the lithium battery to disconnect the circuit, which makes the lithium battery safer to use. The first insulating strip and the second insulating strip are arranged at both ends of the lithium battery, and each insulating strip can play an insulating role. The arrangement of the first through hole and the second through hole allows the bimetallic strip and the elastic strip to pass through the corresponding through holes and contact the lithium battery. The elastic strip can play a pressing and conductive role on the lithium battery.

[0007] Another technical solution of the present invention: a lithium battery pack including lithium battery cells, wherein the lithium battery pack includes a plurality of rows of lithium battery cells, each lithium battery cell is composed of a plurality of lithium battery cells arranged side by side, and two adjacent rows of lithium battery cells are interconnected by a connecting structure.

[0008] With the above further configuration, multiple lithium battery cells form a lithium battery unit, and then multiple lithium battery units form a lithium battery pack. This can be used in situations where multiple lithium batteries are needed to supply power. Similarly, each lithium battery cell has a bimetallic strip. Under normal use, the bimetallic strip contacts the lithium battery to connect the circuit. When the circuit is short-circuited or under high temperature conditions, the bimetallic strip will automatically pop open and separate from the lithium battery to disconnect the circuit. This makes the use of lithium batteries safer. In the grouped lithium battery pack, if one of the lithium battery cells is damaged, the corresponding bimetallic strip will be separated from the lithium battery. In this way, the damage of one lithium battery will not cause damage to the entire group of lithium batteries, which is safer.

[0009] Further configuration of the present invention: the connection structure includes a first conductive sheet and a second conductive sheet arranged at both ends of the lithium battery cell, the first conductive sheet includes a first male plug and a first female plug, the second conductive sheet includes a second male plug and a second female plug, the first male plug is connected to the first female plug and the second female plug is connected to the second male plug between two adjacent rows of lithium battery cells to achieve circuit connectivity, the first conductive sheet is arranged on the side of the bimetallic sheet away from the first insulating sheet, the second conductive sheet is arranged on the side of the second insulating sheet away from the lithium battery, and the elastic sheet is arranged on the second conductive sheet and pressed in the direction of the lithium battery.

[0010] By further adopting the above-mentioned arrangement, the connection between two adjacent rows of lithium battery cells is achieved through a connecting structure. A first conductive sheet and a second conductive sheet are provided on each lithium battery cell. The upper end of the lithium battery is connected to each other through the first male plug and the first female plug on each first conductive sheet to achieve the connection between two adjacent rows of lithium battery cells. The lower end of the lithium battery is connected to each other through the second male plug and the second female plug on each second conductive sheet to achieve the connection between two adjacent rows of lithium battery cells. The connection through the male plug and the female plug is more convenient, and at the same time, the structure is simple and easy to install.

[0011] The present invention is further provided with: a mounting seat for mounting a lithium battery, the mounting seat including a first mounting seat and a second mounting seat arranged at both ends of the lithium battery, the first mounting seat including a plurality of first mounting units that can be assembled with each other, each first mounting unit including a plurality of first mounting monomers, the second mounting seat including a plurality of second mounting units that can be assembled with each other, each second mounting unit including a plurality of second mounting monomers, the first mounting monomers and the second mounting monomers correspond one to one to form an installation space for installing lithium battery monomers, a first fixing member is installed between adjacent first mounting monomers, a second fixing member is installed between adjacent second mounting monomers, a mounting column is installed between the first mounting seat and the second mounting seat, the first fixing member and the second fixing member are connected to the corresponding mounting columns, a first through slot is provided on each first mounting monomer corresponding to the position of the first conductive sheet, the first male plug and the first female plug both extend into the first through slot and are connected to each other, a second through slot is provided on each second mounting monomer corresponding to the position of the second conductive sheet, the second male plug and the second female plug both extend into the second through slot and are connected to each other.

[0012] With the above-mentioned further arrangement, the adjacent first mounting units and the adjacent second mounting units are assembled and fixed respectively by the first fixing member and the second fixing member, and the mounting columns provided between the first mounting seat and the second mounting seat are respectively connected to the first fixing member and the second fixing member, so that the assembled first mounting unit and the second mounting unit are fixed to form an assembly frame for lithium battery installation, which has a simple structure and is easy to operate. The assembly and connection between the mounting units are convenient for the disassembly and assembly of the lithium battery unit on one of the mounting units, and can be increased or decreased according to the demand for the use of lithium battery units. The first male plug and the first female plug extend into the first through groove and are connected to each other, and the second male plug and the second female plug extend into the second through groove and are connected to each other. This arrangement can not only connect the two adjacent mounting units, but also protect the male and female plugs from being exposed, and at the same time can also make the overall mounting seat more compact and save space.

[0013] The present invention is further configured as follows: a first hole monomer is provided on the outer periphery of each first mounting monomer, and the first hole monomers on adjacent first mounting monomers can be combined into a first mounting hole; a second hole monomer is provided on the outer periphery of each second mounting monomer, and the second hole monomers on adjacent second mounting monomers can be combined into a second mounting hole; the first fixing member is installed in the corresponding first mounting hole, and the second fixing member is installed in the corresponding second mounting hole; one end of the mounting column is inserted into the corresponding first mounting hole and connected to the first fixing member, and the other end of the mounting column is inserted into the corresponding second mounting hole and connected to the second fixing member.

[0014] By further adopting the above arrangement, the first hole monomer and the second hole monomer are easy to process and form, so that two first hole monomers are combined to form a first mounting hole for inserting a first fixing member and a mounting column, and two second hole monomers are combined to form a second mounting hole for inserting a second fixing member and a mounting column.

[0015] The present invention is further configured as follows: each first installation unit is provided with a first plug-in block and a first slot for inserting the first plug-in block, and the first plug-in block and the first slot are respectively located on the side of the first installation unit, and the second installation unit is provided with a second plug-in block and a second slot for inserting the second plug-in block, and the second plug-in block and the second slot are respectively located on the side of the second installation unit.

[0016] By further configuring the above, the two adjacent installation units can be guided during assembly through the cooperation of the plug block and the slot, thereby preventing the hole units on the two adjacent installation units from being misaligned during assembly and failing to form installation holes, and can limit the fixation of the two adjacent installation units in the vertical assembly direction.

[0017] The present invention is further configured as follows: each first mounting unit is provided with a first mounting groove, each second mounting unit is provided with a second mounting groove, each first mounting groove is arranged in one-to-one correspondence with the second mounting groove, both ends of the lithium battery unit are inserted in the first mounting groove and the second mounting groove, a first hook is provided between two adjacent first mounting grooves, a first slot is correspondingly provided on the first insulating sheet, the first hook is arranged in the corresponding first slot to realize a fixed connection between the first insulating sheet and the first mounting unit, a second hook is provided between two adjacent second mounting grooves, a second slot is correspondingly provided on the second insulating sheet, the second hook is arranged in the corresponding second slot to realize a fixed connection between the second insulating sheet and the second mounting unit.

[0018] By further configuring the above, the first insulating sheet is fixed to the first mounting seat by means of a snap connection, and the second insulating sheet is fixed to the second mounting seat. This configuration can ensure that the bimetallic sheet and the conductive sheet in the lithium battery cell will not fall off when the fixing part is installed, and is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of a lithium battery cell in a specific embodiment of the present invention;

[0020] Figure 2 Another side view of a lithium battery cell in a specific embodiment of the present invention;

[0021] Figure 3 It is a schematic diagram of a mounting base in a specific embodiment of the present invention;

[0022] Figure 4 It is a structural diagram of a first installation unit and a second installation unit in a specific embodiment of the present invention;

[0023] Figure 5 A schematic diagram of a lithium battery pack in a specific embodiment of the present invention;

[0024] Figure 6 A schematic diagram of a connection structure in a specific embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of installing the first insulating sheet in a specific embodiment of the present invention;

[0026] Figure 8 It is a schematic diagram of installing the second insulating sheet in a specific embodiment of the present invention;

[0027] Fig. 9 for Figure 5 A magnified view of part A;

[0028] Fig.10 for Figure 6 A magnified view of part B;

[0029] Fig.11 for Figure 7 Enlarged view of part C;

[0030] Fig.12 for Figure 8 A magnified view of part D in the middle;

[0031] Fig.13 It is a schematic diagram of a first installation unit in a specific embodiment of the present invention;

[0032] Fig.14 It is a schematic diagram of a second installation unit in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0033] like Figure 1-14 As shown, a lithium battery cell, such as Figure 1 , 2As shown, the lithium battery cell 1 includes a lithium battery 11, a bimetallic sheet 12, a first insulating sheet 13, a second insulating sheet 14 and an elastic sheet 15, the first insulating sheet 13 and the second insulating sheet 14 are respectively arranged at both ends of the lithium battery 11, the bimetallic sheet 12 and the elastic sheet 15 are respectively arranged at both ends of the lithium battery 11, the first insulating sheet 13 is arranged between the lithium battery 11 and the bimetallic sheet 12, and the first insulating sheet 13 is provided with a first through hole 131 for the bimetallic sheet 12 to extend toward the lithium battery 11, the second insulating sheet 14 is arranged between the lithium battery 11 and the elastic sheet 15, and the second insulating sheet 14 is provided with a second through hole 141 for the elastic sheet 15 to contact the lithium battery 11, the bimetallic sheet 12, the first insulating sheet 13, and the second insulating sheet 14 are all arranged in a hollow circular shape, and the bimetallic sheet 12 is provided with an elastic sheet 15. The circular part of the bimetallic strip 12 is fitted with the first insulating strip 13, and the spring sheet passes through the first through hole and contacts the lithium battery 11. The lithium battery cell 1 is provided with a bimetallic strip 12. Under normal use, the bimetallic strip 12 contacts the lithium battery 11 to connect the circuit. When the circuit is short-circuited or under high temperature, the bimetallic strip 12 will automatically pop open and separate from the lithium battery 11 to disconnect the circuit, which makes the lithium battery safer to use. The first insulating strip 13 and the second insulating strip 14 are arranged at both ends of the lithium battery 11, and each insulating strip can play an insulating role. The arrangement of the first through hole 131 and the second through hole 141 allows the bimetallic strip 12 and the elastic strip 15 to pass through the corresponding through holes and contact the lithium battery 11. The elastic strip 15 can compress and conduct the lithium battery 11, making the lithium battery 11 more stable and not easy to loosen.

[0034] A lithium battery pack comprising lithium battery cells, such as Figure 5 As shown, the lithium battery pack 2 includes several rows of lithium battery units 21, each lithium battery unit 21 is composed of several lithium battery cells 1 arranged side by side, and two adjacent rows of lithium battery units 21 are connected to each other through a connecting structure 3. Multiple lithium battery cells 1 form a lithium battery unit 21, and then multiple lithium battery cells 21 form a lithium battery pack 2. This can be used in the case where multiple lithium batteries 11 are required to supply power. Similarly, each lithium battery cell 1 is provided with a bimetallic strip 12. Under normal use, the bimetallic strip 12 contacts the lithium battery 11 to connect the circuit. When the circuit is short-circuited or under high temperature, the bimetallic strip 12 will automatically pop open and separate from the lithium battery 11 to disconnect the circuit. This makes the lithium battery 11 safer to use. In the grouped lithium battery pack 2, if one of the lithium battery cells 1 is damaged, the corresponding bimetallic strip 12 will be separated from the lithium battery 11. In this way, the damage of one of the lithium batteries 11 will not cause the damage of the entire group of lithium batteries 11, which is safer.

[0035] The connection structure 3 includes a first conductive sheet 31 and a second conductive sheet 32 ​​arranged at both ends of the lithium battery cell 1. The first conductive sheet 31 and the second conductive sheet 32 ​​are arranged in a hollow circular shape. The first conductive sheet 31 includes a first male plug 311 and a first female plug 312. The first male plug 311 and the first female plug 312 are symmetrically arranged on both sides of the first conductive sheet 31. The elastic sheet 15 is arranged on the first conductive sheet 31 and passes through the hollow portion and the first through hole 131 on the first insulating sheet 13 to contact the lithium battery 11 to press the lithium battery 11. The second conductive sheet 32 ​​includes a second male plug 321 and a second female plug 322. The second male plug 321 and the second female plug 322 are also symmetrically arranged on both sides of the second conductive sheet 32. The connection between the first male plug 311 and the first female plug 312 and the second female plug 322 between two adjacent rows of lithium battery cells 21 The connection between the female plug 322 and the second male plug 321 realizes the connectivity of the circuit. The first conductive sheet 31 is arranged on the side of the bimetallic sheet 12 away from the first insulating sheet 13, and the second conductive sheet 32 ​​is arranged on the side of the second insulating sheet 14 away from the lithium battery 11. The connection between two adjacent rows of lithium battery cells 21 is realized through the connection structure 3. Each lithium battery cell 1 is provided with a first conductive sheet 31 and a second conductive sheet 32. The upper end of the lithium battery 11 is connected to the first male plug 311 and the first female plug 312 on each first conductive sheet 31 to realize the connection of two adjacent rows of lithium battery cells 21. The lower end of the lithium battery 11 is connected to the second male plug 321 and the second female plug 322 on each second conductive sheet 32 ​​to realize the connection of two adjacent rows of lithium battery cells 21. The connection between the male plug and the female plug is more convenient, and the structure is simple and easy to install.

[0036] In a specific embodiment of the present invention, a mounting seat for mounting a lithium battery 11 is also included, and the mounting seat includes a first mounting seat 4 and a second mounting seat 5 arranged at both ends of the lithium battery 11, and the first mounting seat 4 includes a plurality of first mounting units 41 that can be assembled with each other, and each first mounting unit 41 includes a plurality of first mounting monomers 410, and the second mounting seat 5 includes a plurality of second mounting units 51 that can be assembled with each other, and each second mounting unit 51 includes a plurality of second mounting monomers 510, and the first mounting monomers 410 and the second mounting monomers 510 correspond one by one to form a lithium battery. The installation space for installing the cell monomer 1, a first fixing member is installed between adjacent first installation monomers 410, a second fixing member is installed between adjacent second installation monomers 510, the first fixing member and the second fixing member are set by screws, and a mounting column 6 is installed between the first mounting seat 41 and the second mounting seat 51, the first fixing member and the second fixing member are connected to the corresponding mounting column 6, and a first through groove 411 is provided on each first installation monomer 410 corresponding to the position of the first conductive sheet 31, and the first male plug 311 and the first female plug 312 both extend into the first through groove 411 and are connected to each other. A second through slot 511 is provided on each second mounting monomer 510 at a position corresponding to the second conductive sheet 32, and the second male plug 321 and the second female plug 322 are both extended into the second through slot 511 and are connected to each other. The adjacent first mounting monomer 410 and the adjacent second mounting monomer 510 are assembled and fixed by the first fixing member and the second fixing member, respectively, and the mounting column 6 provided between the first mounting seat 41 and the second mounting seat 51 is respectively connected to the first fixing member and the second fixing member, so that the assembled first mounting monomer 410 and the second mounting monomer 510 are fixed to form a lithium battery 11 mounting bracket. The assembly frame has a simple structure and is easy to operate. The installation units are assembled and connected to facilitate the disassembly and assembly of the lithium battery cell 1 on one of the installation units, and can be increased or decreased according to the use requirements of the lithium battery cell 1. The first male plug 311 and the first female plug 312 extend into the first through groove 411 and are connected to each other. The second male plug 321 and the second female plug 322 extend into the second through groove 511 and are connected to each other. This arrangement can connect two adjacent installation units and protect the male and female plugs from being exposed. At the same time, it can also make the overall mounting seat more compact and save space.

[0037] Among them, each first mounting monomer 410 is provided with a first hole monomer 412 on the periphery, and the first hole monomers 412 on adjacent first mounting monomers 410 can be combined into a first mounting hole 42; each second mounting monomer 510 is provided with a second hole monomer 512 on the periphery, and the second hole monomers 512 on adjacent second mounting monomers 510 can be combined into a second mounting hole 52; the first fixing member is installed in the corresponding first mounting hole 42, and the second fixing member is installed in the corresponding second mounting hole 52; one end of the mounting column 6 is inserted into the corresponding first mounting hole 42 to be connected with the first fixing member, and the other end of the mounting column 6 is inserted into the corresponding second mounting hole 52 to be connected with the second fixing member; the first hole monomer 412 and the second hole monomer 512 are convenient to be processed and formed, so that the two first hole monomers 412 are combined to form the first mounting hole 42 for the first fixing member and the mounting column 6 to be inserted, and the two second hole monomers 512 are combined to form the second mounting hole 52 for the second fixing member and the mounting column 6 to be inserted.

[0038] Among them, a first plug-in block 413 and a first slot 414 for inserting the first plug-in block 413 are provided on the first installation monomer 410, and the first plug-in block 413 and the first slot 414 are respectively located on the sides of the first installation monomer 410, and a second plug-in block 513 and a second slot 514 for inserting the second plug-in block 513 are provided on the second installation monomer 510, and the second plug-in block 513 and the second slot 514 are respectively located on the sides of the second installation monomer 510. Through the cooperation of the plug-in block and the slot, the two adjacent installation monomers can be guided during assembly, thereby avoiding the misalignment of the hole monomers on the two adjacent installation monomers during assembly, and failing to form the installation holes, and limiting the fixation of the two adjacent installation monomers in the vertical assembly direction. When the first mounting seat 4 is assembled, the first plug-in block 413 on the first mounting monomer 410 is inserted into the first notch 414 on the adjacent first mounting monomer 410 to prevent the adjacent two first mounting monomers 410 from being separated in the vertical assembly direction. The two first hole monomers 412 are combined to form a first mounting hole 42. The second plug-in block 513 on the second mounting monomer 510 is inserted into the second notch 514 on the adjacent second mounting monomer 510 to prevent the adjacent two second mounting monomers 510 from being separated in the horizontal direction. The two second hole monomers 512 are combined to form a second mounting hole 52. The first mounting hole 42 and the second mounting hole 52 are provided with mounting posts 6, the first fixing member is inserted into the first mounting hole 42, and the head of the first fixing member abuts against the first mounting unit 41, the second fixing member is inserted into the second mounting hole 52, and the head of the second fixing member abuts against the second mounting unit 510, thereby fixing the assembled first mounting unit 410 and the second mounting unit 510 to form an assembly frame for installing lithium batteries, which has a simple structure and is easy to operate. The mounting units are assembled and connected to facilitate the disassembly and assembly of the lithium battery unit 1 on one of the mounting units, and can be increased or decreased according to the use requirements of the lithium battery unit 1.

[0039] In a specific embodiment of the present invention, each first mounting unit 410 is provided with a first mounting groove 415, each second mounting unit 510 is provided with a second mounting groove 515, each first mounting groove 415 and the second mounting groove 515 are arranged one by one, and both ends of the lithium battery unit 1 are inserted into the first mounting groove 415 and the second mounting groove 515, and a first hook 7 is provided between two adjacent first mounting grooves 415, and a first slot 132 is correspondingly provided on the first insulating sheet 13, and the first hook 7 is clamped in the corresponding first slot 132 to realize the fixed connection between the first insulating sheet 12 and the first mounting unit 410, and the adjacent A second hook 8 is provided between the two second mounting grooves 515, and a second slot 142 is correspondingly provided on the second insulating sheet 14. The second hook 8 is clamped in the corresponding second slot 142 to realize the fixed connection between the second insulating sheet 14 and the second mounting unit 510. The first insulating sheet 13 is fixed to the first mounting seat 4 by a snap connection, and the second insulating sheet 14 is fixedly arranged on the second mounting seat 5. When the mounting seat is installed and fixed, this arrangement can ensure that the bimetallic sheet 12 and the conductive sheets in the lithium battery unit 1 will not fall off and separate from the lithium battery 11, so that the lithium battery pack 2 is more stable when in use.

Claims

1. A lithium battery cell, characterized in that: The lithium battery cell includes a lithium battery, a bimetallic sheet, a first insulating sheet, a second insulating sheet and an elastic sheet, the first insulating sheet and the second insulating sheet are respectively arranged at two ends of the lithium battery, the bimetallic sheet and the elastic sheet are respectively arranged at two ends of the lithium battery, the first insulating sheet is arranged between the lithium battery and the bimetallic sheet, and the first insulating sheet is provided with a first through hole for the bimetallic sheet to extend toward the lithium battery, the second insulating sheet is arranged between the lithium battery and the elastic sheet, and the second insulating sheet is provided with a second through hole for the elastic sheet to contact the lithium battery.

2. A lithium battery pack comprising the lithium battery cell according to claim 1, characterized in that: The lithium battery pack includes a plurality of rows of lithium battery units, each of which is composed of a plurality of lithium battery cells arranged side by side, and two adjacent rows of lithium battery units are connected to each other via a connecting structure.

3. A lithium battery pack of lithium battery cells according to claim 2, characterized in that: The connection structure includes a first conductive sheet and a second conductive sheet arranged at both ends of the lithium battery cell, the first conductive sheet includes a first male plug and a first female plug, the second conductive sheet includes a second male plug and a second female plug, the first male plug is connected to the first female plug and the second female plug is connected to the second male plug between two adjacent rows of lithium battery cells to achieve circuit connectivity, the first conductive sheet is arranged on a side of the bimetallic sheet away from the first insulating sheet, the second conductive sheet is arranged on a side of the second insulating sheet away from the lithium battery, and the elastic sheet is arranged on the second conductive sheet and pressed in the direction of the lithium battery.

4. A lithium battery pack of lithium battery cells according to claim 3, characterized in that: The invention also includes a mounting seat for installing a lithium battery, wherein the mounting seat includes a first mounting seat and a second mounting seat arranged at both ends of the lithium battery, the first mounting seat includes a plurality of first mounting units that can be assembled with each other, each first mounting unit includes a plurality of first mounting monomers, the second mounting seat includes a plurality of second mounting units that can be assembled with each other, each second mounting unit includes a plurality of second mounting monomers, the first mounting monomers and the second mounting monomers correspond to each other to form an installation space for installing lithium battery monomers, a first fixing member is installed between adjacent first mounting monomers, a second fixing member is installed between adjacent second mounting monomers, a mounting column is installed between the first mounting seat and the second mounting seat, the first fixing member and the second fixing member are connected to the corresponding mounting columns, a first through slot is provided on each first mounting monomer corresponding to the position of the first conductive sheet, the first male plug and the first female plug both extend into the first through slot and are connected to each other, a second through slot is provided on each second mounting monomer corresponding to the position of the second conductive sheet, the second male plug and the second female plug both extend into the second through slot and are connected to each other.

5. A lithium battery pack of lithium battery cells according to claim 4, characterized in that: A first hole monomer is provided on the periphery of each first mounting monomer, and the first hole monomers on adjacent first mounting monomers can be combined into a first mounting hole. A second hole monomer is provided on the periphery of each second mounting monomer, and the second hole monomers on adjacent second mounting monomers can be combined into a second mounting hole. The first fixing member is installed in the corresponding first mounting hole, and the second fixing member is installed in the corresponding second mounting hole. One end of the mounting column is inserted into the corresponding first mounting hole to be connected to the first fixing member, and the other end of the mounting column is inserted into the corresponding second mounting hole to be connected to the second fixing member.

6. A lithium battery pack of lithium battery cells according to claim 5, characterized in that: Each first installation unit is provided with a first plug-in block and a first slot for inserting the first plug-in block, and the first plug-in block and the first slot are respectively located on the side of the first installation unit, and the second installation unit is provided with a second plug-in block and a second slot for inserting the second plug-in block, and the second plug-in block and the second slot are respectively located on the side of the second installation unit.

7. A lithium battery pack of lithium battery cells according to claim 6, characterized in that: Each first mounting unit is provided with a first mounting groove, and each second mounting unit is provided with a second mounting groove. Each first mounting groove and the second mounting groove are arranged in a one-to-one correspondence. Both ends of the lithium battery unit are inserted into the first mounting groove and the second mounting groove. A first hook is provided between two adjacent first mounting grooves. A first slot is correspondingly provided on the first insulating sheet. The first hook is arranged in the corresponding first slot to realize a fixed connection between the first insulating sheet and the first mounting unit. A second hook is provided between two adjacent second mounting grooves. A second slot is correspondingly provided on the second insulating sheet. The second hook is arranged in the corresponding second slot to realize a fixed connection between the second insulating sheet and the second mounting unit.

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