Lithium battery protection plate and lithium battery with same

Abstract

The lithium battery protection plate comprises an outer protection assembly and an inner shell, a cover plate is installed at the top end of the inner shell, a lithium battery containing cavity is formed between the inner shell and the cover plate, and the inner shell and the cover plate are located in the outer protection assembly after being assembled; the outer protection assembly comprises an outer protection frame, corner reinforcing parts are arranged at the corners of the outer protection frame, first buffering pieces are arranged on the two long inner side faces of the outer protection frame, and second buffering pieces are arranged on the two short inner side faces of the outer protection frame. According to the invention, the lithium battery main body can be protected through the outer protection assembly, so that the impact resistance of the lithium battery main body is improved; and the lithium battery main body further protects the battery cell due to the existence of the shell, so that the influence of external impact on the battery cell is avoided, the safety of the battery cell is ensured, and the possibility of disasters is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, in particular to a lithium battery protection plate and a lithium battery having the protection plate. Background Art

[0002] In order to better protect the lithium battery, many current lithium battery protection boards are now equipped with buffer pads inside. The buffer pads are used to clamp and fix the lithium battery, so that the lithium battery can be protected while being fixed.

[0003] The existing announcement number CN119674383A discloses a shock-proof and collision-proof lithium battery protection plate, including a shell, wherein the interior of the shell is provided with a shock-proof component for reducing the vibration of the battery pack. There are four shock-proof components in total, and the shock-proof components are arranged at the four corners inside the shell. The front and rear sides of the shell are both provided with an anti-collision component 1 for reducing the impact force, and an anti-collision component 2 is provided directly below the shell. The anti-collision component 2 is used to further reduce the impact force. When the front of the shell is hit, the lithium battery can be moved backward through the cooperation of the anti-collision component 1 and the connecting component to avoid damage to the lithium battery caused by the deformed shell, thereby reducing the probability of spontaneous combustion and explosion of the lithium battery, and when subjected to a smaller impact, the obstacle can be discharged to avoid affecting driving safety.

[0004] Publication No. CN116780038A discloses a lithium battery protection plate and a lithium battery device having the same. The plate comprises a circuit board, a heat dissipation cover, and a heating device. The heat dissipation cover is fixed above the circuit board and close to the electronic components on the circuit board. The heating device comprises a carrier plate and a heating plate. The carrier plate is pivotally connected to the heat dissipation cover about a horizontal axis, and the heating plate is fixed to the surface of the carrier plate to heat the battery. The carrier plate can switch between at least a first position and a second position within its rotation range. When in the first position, the carrier plate is parallel to the circuit board, and when in the second position, the carrier plate is perpendicular to the circuit board. The mounting structure is simple and does not need to be installed inside the battery pack. This can eliminate the problem of localized heating, achieve more uniform heating, and improve the battery's performance in low-temperature environments.

[0005] Although the lithium battery protection board in the existing technology can protect the lithium battery to a certain extent, its protection performance is relatively poor when the lithium battery is impacted, and it is easy to bump into the battery cell, causing certain safety hazards. Therefore, we propose a lithium battery protection board and a lithium battery with a protection board. Summary of the Invention

[0006] The object of the present invention is to provide a lithium battery protection plate and a lithium battery having the protection plate, so as to solve the problems in the prior art.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a lithium battery protection plate, comprising an outer protection assembly and an inner shell, a cover plate is installed on the top of the inner shell, a lithium battery accommodating cavity is formed between the inner shell and the cover plate, and the inner shell and the cover plate are located inside the outer protection assembly after assembly; the outer protection assembly can protect the lithium battery body and improve the impact resistance of the lithium battery body; the lithium battery body further protects the battery cell due to the presence of the outer shell, thereby avoiding the influence of external impact on the battery cell, ensuring the safety of the battery cell and reducing the possibility of disasters; the outer protection assembly includes an outer protection frame, and the corners of the outer protection frame are provided with corner reinforcement parts, the two long inner sides of the outer protection frame are provided with a first buffer member, and the two short inner sides of the outer protection frame are provided with a second buffer member; the corners of the outer protection frame Both are provided with corner reinforcement parts, which can reinforce the outer protective frame and improve the ability to withstand impact when it is impacted. The two long inner sides of the outer protective frame are provided with a first buffer part, and the two short inner sides of the outer protective frame are provided with a second buffer part. The first buffer part is a wavy structure, and the second buffer part is a wavy structure. The first buffer part and the second buffer part are outer protective components with certain buffering performance, so that the lithium battery body can be buffered to a certain extent in the outer protective component, and adjacent buffer parts do not contact, so that the outer protective component can be buffered within a certain range; the first buffer part is provided with a spring sheet at the bent part on one side of the outer protective frame, and the second buffer part is provided with a spring sheet at the bent part on one side of the outer protective frame. The spring sheet is an arc-shaped metal sheet. The spring sheet enhances the resetting effect of the buffer part, further enhancing the buffering performance and impact resistance of the buffer part.

[0008] Preferably, the first buffer member is a wavy structure, and the second buffer member is a wavy structure.

[0009] Preferably, the first buffer member is provided with an elastic sheet at a bent portion located on one side of the outer protective frame, and the second buffer member is provided with an elastic sheet at a bent portion located on one side of the outer protective frame.

[0010] Preferably, the spring piece is an arc-shaped metal sheet.

[0011] Preferably, the cavity formed by the undulating structure is filled with a fire-extinguishing airbag filled with perfluorohexanone fire extinguishing agent. The fire-extinguishing airbag is a non-pressure-storage airbag, which is efficient and safe, suitable for high-risk scenarios. When subjected to extreme impact, the outer protective component is compressed and damaged, and the outer protective component deforms to the extreme, which can squeeze the fire-extinguishing airbag, thereby protecting the lithium battery, solving the problem of lithium battery fire causing widespread combustion in the vehicle due to impact, and improving the safety of lithium battery use.

[0012] A lithium battery with a protective plate uses the lithium battery protection plate, including a lithium battery body, a connector, a fuse, a unit lithium battery pack, an MCU component and a connecting rod. The unit lithium battery packs are provided in plurality, and adjacent unit lithium battery packs are connected by connecting rods. The MCU component and one of the unit lithium battery packs are connected to the connector via wires, and a fuse is installed on the wire between the unit lithium battery pack and the connector; the cover plate and the outer protective component are both provided with through holes for the connector to pass through.

[0013] Preferably, the unit lithium battery pack includes a bottom plate and a top plate, a plurality of battery cells are installed between the bottom plate and the top plate, two cross bars are installed at the bottom end of the bottom plate, and two cross bars are installed at the top end of the top plate. The two corresponding cross bars are connected by a connecting rod, and the adjacent battery cells are connected by a connecting piece. The bottom plate, top plate, battery cells and cross bars are locked by a locking frame.

[0014] Preferably, a terminal block is installed at one end of each cross bar.

[0015] Preferably, the bottom plate and the top plate both include a plate body, the plate body is provided with a plurality of limiting holes that cooperate with the battery cells, and the plate body is installed with limiting plates at the limiting holes. The limiting holes and the limiting plates work together to fix the battery cells well between the top plate and the bottom plate, thereby ensuring the stability of the battery cells and improving the stable conductive performance of the battery cells.

[0016] Preferably, it also includes a base and a lifting tray, the bottom end of the base is equipped with a mounting seat, the mounting seat is equipped with a lifting cylinder that drives the lifting tray to rise and fall, the bottom end of the base is equipped with a push-pull cylinder, the push-pull cylinder pushes the fixed plate to move back and forth, the fixed plate is equipped with a plurality of vertical plates at equal intervals, each of the vertical plates is equipped with a pressure rod, the base is equipped with a guide sleeve, and the fixed plate is equipped with a guide rod that cooperates with the guide sleeve; the top of the lithium battery is limited by the pressure rod (mainly used for lithium batteries in trucks, the truck space is larger and can accommodate this device well), thereby realizing all-round limitation of the lithium battery, making it more convenient to disassemble and limit the lithium battery, the base is equipped with a guide sleeve, and the fixed plate is equipped with a guide rod that cooperates with the guide sleeve, the guide sleeve and the guide rod are used to improve the stability of the movement of the fixed plate, and further improve the limiting effect.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. After assembly, the inner shell and cover are located inside the outer protection assembly. The outer protection assembly can protect the lithium battery body and improve the impact resistance of the lithium battery body. The lithium battery body further protects the battery cell due to the presence of the outer shell, thereby avoiding the impact of external impact on the battery cell, ensuring the safety of the battery cell and reducing the possibility of disasters.

[0019] 2. The corners of the outer protective frame are all provided with corner reinforcement parts, which can reinforce the outer protective frame and improve its ability to withstand impact when it is impacted. The two long inner sides of the outer protective frame are provided with a first buffer member, and the two short inner sides of the outer protective frame are provided with a second buffer member. The first buffer member is a wavy structure, and the second buffer member is a wavy structure. The first buffer member and the second buffer member are outer protective components with a certain buffering performance, so that the lithium battery body can be buffered to a certain extent in the outer protective component. Adjacent buffer members do not contact, so that the outer protective component can be buffered within a certain range; the first buffer member is provided with a spring sheet at the bent portion on one side of the outer protective frame, and the second buffer member is provided with a spring sheet at the bent portion on one side of the outer protective frame. The spring sheet is an arc-shaped metal sheet. The spring sheet enhances the resetting effect of the buffer member, further enhancing the buffering performance and impact resistance of the buffer member;

[0020] 3. Two cross bars are installed at the bottom end of the bottom plate, and two cross bars are installed at the top end of the top plate. The two corresponding cross bars are connected by a connecting rod. The two cross bars can not only conduct electricity but also serve as reinforcement. Adjacent battery cells are connected by connecting pieces. The bottom plate, top plate, battery cells and cross bars are locked by a locking frame. The locking frame is used to lock each component to improve the stability of each component.

[0021] 4. The board body is provided with a plurality of limiting holes that cooperate with the battery cells. The limiting plates are installed at the limiting holes. The limiting holes and the limiting plates work together to fix the battery cells well between the top plate and the bottom plate, thereby ensuring the stability of the battery cells and improving the stable conductive performance of the battery cells.

[0022] 5. The cavity formed by the undulating structure is filled with a fire-extinguishing airbag filled with perfluorohexanone fire extinguishing agent. The non-pressure-storage airbag is efficient and safe, suitable for high-risk scenarios. When subjected to extreme impact, the outer protective component is compressed and damaged, and the extreme deformation of the outer protective component can squeeze the airbag, thereby protecting the lithium battery, eliminating the problem of lithium battery fires causing widespread combustion in the vehicle due to impact, and improving the safety of lithium battery use.

[0023] 6. The mounting base is equipped with a lifting cylinder that drives the lifting tray to lift up and down. The bottom and sides of the lithium battery are limited by the lifting tray. A push-pull cylinder is installed at the bottom of the base. The push-pull cylinder pushes the fixed plate to move back and forth. Multiple vertical plates are installed at equal intervals on the fixed plate. Each vertical plate is equipped with a pressure rod. The top of the lithium battery is limited by the pressure rod (mainly used for truck lithium batteries. Trucks have a large space and can accommodate this device well), thereby achieving all-round limitation of the lithium battery and making it more convenient to disassemble and limit the lithium battery. The base is equipped with a guide sleeve, and the fixed plate is equipped with a guide rod that cooperates with the guide sleeve. The guide sleeve and the guide rod are used to improve the stability of the fixed plate movement and further improve the limiting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 is a front view of the outer protective assembly of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the lithium battery body of the present invention;

[0028] Figure 4 It is a schematic diagram of the internal structure of the lithium battery body of the present invention;

[0029] Figure 5 This invention Figure 4 Structural diagram from another perspective;

[0030] Figure 6 It is a structural schematic diagram of a unit lithium battery pack of the present invention;

[0031] Figure 7 It is a structural schematic diagram of the bottom plate and the top plate of the present invention;

[0032] Figure 8 This is a schematic diagram of the structure of the fixed outer protection component of the present invention;

[0033] Figure 9 This invention Figure 8 Schematic diagram of the structure with the outer protective components removed;

[0034] Figure 10 This invention Figure 9 Schematic diagram of the structure from the bottom perspective.

[0035] Figure: 1, outer protection assembly; 2, lithium battery body; 3, base; 4, lifting tray; 5, push-pull cylinder; 6, guide rod; 7, mounting seat; 8, guide sleeve; 9, fixing plate; 10, vertical plate; 11, pressure rod; 12, lifting cylinder; 101, corner reinforcement; 102, outer protection frame; 103, first buffer; 104, spring; 105, second buffer; 201, inner shell; 202, cover plate ; 203, connector; 204, fuse; 205, unit lithium battery pack; 206, MCU component; 207, connecting rod; 2051, bottom plate; 2052, battery cell; 2053, top plate; 2054, terminal; 2055, locking frame; 2056, cross bar; 2057, connecting piece; 2058, connecting rod; 20511, plate body; 20512, limit hole; 20513, limit plate. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention.

[0037] See also Figure 1-7 In an embodiment of the present invention, a lithium battery protection plate includes an outer protection component 1 and an inner shell 201. A cover plate 202 is installed on the top of the inner shell 201. A lithium battery accommodating cavity is formed between the inner shell 201 and the cover plate 202. After the inner shell 201 and the cover plate 202 are assembled, they are located inside the outer protection component 1; the outer protection component 1 can protect the lithium battery body and improve the impact resistance of the lithium battery body; the lithium battery body 2 further protects the battery cell due to the presence of the outer shell, thereby avoiding the influence of external impact on the battery cell, ensuring the safety of the battery cell, and reducing the possibility of disasters.

[0038] The outer protection assembly 1 includes an outer protection frame 102, and corner reinforcement parts 101 are provided at the corners of the outer protection frame 102. The corner reinforcement parts 101 can reinforce the outer protection frame 102 and improve the ability to withstand impact when it is impacted. The two long inner sides of the outer protection frame 102 are provided with a first buffer member 103, and the two short inner sides of the outer protection frame 102 are provided with a second buffer member 105. The first buffer member 103 is a wavy structure, and the second buffer member 105 is a wavy structure. The first buffer member 103 and the second buffer member 105 are wavy structures. 5. The outer protective component 1 has a certain buffering performance, so that the lithium battery body 2 can perform a certain buffering in the outer protective component 1, and adjacent buffers do not contact, so that the outer protective component 1 can buffer within a certain range; the first buffer 103 is located at the bent portion on one side of the outer protective frame 102 and is provided with a spring piece 104, and the second buffer 105 is located at the bent portion on one side of the outer protective frame 102 and is provided with a spring piece 104. The spring piece 104 is an arc-shaped metal sheet. The spring piece 104 enhances the reset effect of the buffer, further enhancing the buffering performance and impact resistance of the buffer.

[0039] The cavity formed by the undulating structure is filled with a fire-extinguishing airbag filled with perfluorohexanone fire extinguishing agent. This non-pressure-storage airbag is highly efficient and safe, making it suitable for high-risk scenarios. When subjected to extreme impact, the outer protective assembly 1 is compressed and damaged, causing extreme deformation, which can rupture the airbag and protect the lithium battery. This prevents lithium battery fires from causing widespread combustion in the vehicle due to impact, and improves the safety of lithium battery use.

[0040] A lithium battery with a protection plate uses the lithium battery protection plate, including a lithium battery body 2, a connector 203, a fuse 204, a unit lithium battery pack 205, an MCU component 206 and a connecting rod 207. The unit lithium battery pack 205 is provided in plurality, and adjacent unit lithium battery packs 205 are connected by connecting rods 207. The MCU component 206 and one of the unit lithium battery packs 205 are connected to the connector 203 through a wire. A fuse 204 is installed on the wire between the unit lithium battery pack 205 and the connector 203. The fuse 204 improves the safety of electricity use. The cover plate 202 and the outer protective component 1 are both provided with a through hole for the connector 203 to pass through.

[0041] The unit lithium battery pack 205 includes a bottom plate 2051 and a top plate 2053, and multiple battery cells 2052 are installed between the bottom plate 2051 and the top plate 2053. Two cross bars 2056 are installed at the bottom end of the bottom plate 2051, and two cross bars 2056 are installed at the top of the top plate 2053. The two corresponding cross bars 2056 are connected by a connecting rod 2058. The two cross bars 2056 can not only conduct electricity but also serve as reinforcement; adjacent battery cells 2052 are connected by connecting plates 2057, and the bottom plate 2051, top plate 2053, battery cells 2052 and cross bars 2056 are locked by a locking frame 2055, and each component is locked by the locking frame 2055; a terminal 2054 is installed at one end of each cross bar 2056.

[0042] The bottom plate 2051 and the top plate 2053 both include a plate body 20511, and the plate body 20511 is provided with a plurality of limiting holes 20512 that cooperate with the battery cells 2052. The plate body 20511 is provided with limiting plates 20513 located at the limiting holes 20512. The limiting holes and the limiting plates work together to fix the battery cells well between the top plate and the bottom plate, thereby ensuring the stability of the battery cells and improving the stable conductive performance of the battery cells.

[0043] like Figure 8-10, also includes a base 3 and a lifting tray 4, the bottom end of the base 3 is equipped with a mounting seat 7, the mounting seat 7 is equipped with a lifting cylinder 12 for driving the lifting tray 4 to lift, and the bottom and side of the lithium battery are limited by the lifting tray 4, and a push-pull cylinder 5 is installed at the bottom end of the base 3, and the push-pull cylinder 5 pushes the fixed plate 9 to move back and forth, and the fixed plate 9 is evenly spaced and equipped with a plurality of vertical plates 10, each of the vertical plates 10 is equipped with a pressure rod 11, which is used to limit the top of the lithium battery through the pressure rod (mainly used for truck lithium batteries, the truck space is large and can accommodate this device well), thereby realizing all-round limitation of the lithium battery, making it more convenient to disassemble and limit the lithium battery, and the base 3 is equipped with a guide sleeve 8, and the fixed plate 9 is equipped with a guide rod 6 cooperating with the guide sleeve 8. The stability of the movement of the fixed plate is improved by the guide sleeve and the guide rod.

[0044] The working principle of the present invention is as follows: the inner housing 201 and the cover plate 202 are assembled and located inside the outer protection assembly 1; the outer protection assembly 1 can protect the lithium battery body and improve the impact resistance of the lithium battery body; the lithium battery body 2, due to the presence of the outer shell, further protects the battery cell, thereby preventing the impact of external impact on the battery cell, ensuring the safety of the battery cell and reducing the possibility of disasters;

[0045] The corners of the outer protective frame 102 are all provided with corner reinforcement parts 101, which can reinforce the outer protective frame 102 and improve its ability to withstand impact when it is impacted. The two long inner sides of the outer protective frame 102 are provided with a first buffer member 103, and the two short inner sides of the outer protective frame 102 are provided with a second buffer member 105. The first buffer member 103 is a wavy structure, and the second buffer member 105 is a wavy structure. The first buffer member 103 and the second buffer member 105 are the outer protective component 1 with A certain buffering performance enables the lithium battery body 2 to provide a certain buffering effect in the outer protective assembly 1. Adjacent buffer members do not contact each other, so that the outer protective assembly 1 can provide buffering within a certain range. The first buffer member 103 is provided with a spring piece 104 at the bent portion on one side of the outer protective frame 102. The second buffer member 105 is provided with a spring piece 104 at the bent portion on one side of the outer protective frame 102. The spring piece 104 is an arc-shaped metal sheet. The spring piece 104 enhances the resetting effect of the buffer member, further enhancing the buffering performance and impact resistance of the buffer member.

[0046] Two cross bars 2056 are installed at the bottom end of the bottom plate 2051, and two cross bars 2056 are installed at the top end of the top plate 2053. The two corresponding cross bars 2056 are connected by a connecting rod 2058. The two cross bars 2056 not only provide conduction but also serve as reinforcement. Adjacent battery cells 2052 are connected by connecting pieces 2057. The bottom plate 2051, top plate 2053, battery cells 2052 and cross bars 2056 are locked by a locking frame 2055. The locking frame 2055 locks each component to improve the stability of each component.

[0047] The plate body 20511 is provided with a plurality of limiting holes 20512 that cooperate with the battery cells 2052. The plate body 20511 is provided with limiting plates 20513 at the limiting holes 20512. The limiting holes and the limiting plates work together to well fix the battery cells between the top plate and the bottom plate, thereby ensuring the stability of the battery cells and improving the stable conductive performance of the battery cells.

[0048] The bottom and sides of the lithium battery are limited by the lifting tray 4, and a push-pull cylinder 5 is installed at the bottom of the base 3. The push-pull cylinder 5 pushes the fixed plate 9 to move back and forth. The fixed plate 9 is installed with multiple vertical plates 10 at equal intervals. Each vertical plate 10 is installed with a pressure rod 11. The top of the lithium battery is limited by the pressure rod (mainly used for truck lithium batteries. The truck has a large space and can accommodate this device well), thereby realizing all-round limitation of the lithium battery, making it more convenient to disassemble and limit the lithium battery. The base 3 is installed with a guide sleeve 8, and the fixed plate 9 is installed with a guide rod 6 that cooperates with the guide sleeve 8. The guide sleeve and the guide rod are used to improve the stability of the movement of the fixed plate.

[0049] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A lithium battery protection board, characterized in that: The invention comprises an outer protective assembly (1) and an inner shell (201), wherein a cover plate (202) is installed on the top of the inner shell (201), a lithium battery accommodating cavity is formed between the inner shell (201) and the cover plate (202), and the inner shell (201) and the cover plate (202) are located inside the outer protective assembly (1) after being assembled; The outer protection assembly (1) comprises an outer protection frame (102), corners of the outer protection frame (102) are each provided with a corner reinforcement portion (101), two long inner side surfaces of the outer protection frame (102) are provided with a first buffer member (103), and two short inner side surfaces of the outer protection frame (102) are provided with a second buffer member (105).

2. The lithium battery protection board according to claim 1, characterized in that: The first buffer (103) has a wavy structure, and the second buffer (105) has a wavy structure.

3. The lithium battery protection board according to claim 2, characterized in that: The first buffer member (103) is provided with a spring piece (104) at a bent portion located on one side of the outer protective frame (102), and the second buffer member (105) is provided with a spring piece (104) at a bent portion located on one side of the outer protective frame (102).

4. A lithium battery protection board according to claim 3, characterized in that: The spring piece (104) is an arc-shaped metal piece.

5. The lithium battery protection board according to claim 2, characterized in that: The cavity formed by the wavy structure is filled with a fire extinguishing airbag, which is filled with perfluorohexanone fire extinguishing agent. The fire extinguishing airbag is a non-pressure storage airbag.

6. A lithium battery with a protective plate, characterized in that: A lithium battery protection board according to any one of claims 1 to 5 is used, comprising a lithium battery body (2), a connector (203), a fuse (204), a unit lithium battery pack (205), an MCU component (206) and a connecting rod (207), wherein a plurality of unit lithium battery packs (205) are provided, and adjacent unit lithium battery packs (205) are connected via connecting rods (207), the MCU component (206) and one of the unit lithium battery packs (205) are connected to the connector (203) via a wire, and a fuse (204) is installed on the wire between the unit lithium battery pack (205) and the connector (203); and the cover plate (202) and the outer protection component (1) are both provided with a through hole for the connector (203) to pass through.

7. The lithium battery with a protective plate according to claim 5, characterized in that: The unit lithium battery pack (205) comprises a bottom plate (2051) and a top plate (2053), a plurality of battery cells (2052) are installed between the bottom plate (2051) and the top plate (2053), two cross bars (2056) are installed at the bottom end of the bottom plate (2051), and two cross bars (2056) are installed at the top end of the top plate (2053), two corresponding cross bars (2056) are connected by a connecting rod (2058), and adjacent battery cells (2052) are connected by a connecting piece (2057), and the bottom plate (2051), the top plate (2053), the battery cells (2052) and the cross bars (2056) are locked by a locking frame (2055).

8. The lithium battery with a protective plate according to claim 6, characterized in that: A terminal head (2054) is installed at one end of each crossbar (2056).

9. The lithium battery with a protective plate according to claim 6, characterized in that: The bottom plate (2051) and the top plate (2053) both include a plate body (20511), the plate body (20511) is provided with a plurality of limiting holes (20512) that cooperate with the battery cells (2052), and the plate body (20511) is provided with limiting plates (20513) located at the limiting holes (20512).

10. The lithium battery with a protective plate according to claim 6, characterized in that: The utility model also includes a base (3) and a lifting tray (4), wherein a mounting seat (7) is installed at the bottom end of the base (3), and a lifting cylinder (12) is installed on the mounting seat (7) for driving the lifting tray (4) to move up and down, a push-pull cylinder (5) is installed at the bottom end of the base (3), and the push-pull cylinder (5) pushes the fixed plate (9) to move back and forth, and a plurality of vertical plates (10) are installed at equal intervals on the fixed plate (9), and each of the vertical plates (10) is installed with a pressure rod (11), and a guide sleeve (8) is installed on the base (3), and a guide rod (6) matched with the guide sleeve (8) is installed on the fixed plate (9).

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