PACK Structure of Soft-pack Lithium Battery

Abstract

The present invention discloses a PACK structure of a soft-pack lithium battery, which relates to the technical field of lithium batteries. Among them, the PACK structure of the soft-pack lithium battery includes: a housing, a battery cell assembly, a sliding device, and a charging and discharging terminal; an output port is provided on the side wall of the housing; the battery cell assembly is installed in the housing; the sliding device is installed on the housing; the charging and discharging terminal is installed on the sliding device, and the charging and discharging terminal has an input end and an output end. The input end is electrically connected to the battery cell assembly through a flexible wire. The charging and discharging terminal is slidably installed on the housing through the sliding device, so that the output end can be slidably adjusted within the output port. The technical solution provided by the present invention improves the adaptability of the lithium battery by arranging a sliding device in the structure and connecting the charging and discharging terminal to the sliding device, so that the charging and discharging terminal can be slidably installed in the housing through the sliding device, thereby making the position of the charging and discharging terminal relative to the structure adjustable.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and particularly to a PACK structure of a soft-pack lithium battery. Background Art

[0002] A soft-pack battery cell generally refers to a lithium battery cell encapsulated with an aluminum-plastic composite film as the outer shell. Due to its advantages such as light weight, low mold opening cost, and high safety, its market share is gradually expanding. Lithium batteries are widely used in power systems, especially in various electric transport vehicle systems such as electric bicycles, electric forklifts, and electric scooters. In order to ensure sufficient power intensity for the power system, multiple soft-pack battery cells are usually connected in series and stacked to form a soft-pack lithium battery and then put into use in equipment. In the existing soft-pack lithium batteries, the charging and discharging terminals for external devices to access cannot be adjusted after assembly. If there is no corresponding power-taking port opened at the corresponding position on the transport device, it is easy to cause the plug to be unable to insert into the charging and discharging terminals to take power. Summary of the Invention

[0003] The main object of the present invention is to propose a PACK structure of a soft-pack lithium battery, aiming to achieve adjustable positions of the charging and discharging terminals of the soft-pack lithium battery.

[0004] To achieve the above object, the PACK structure of the soft-pack lithium battery proposed by the present invention includes: a housing, a battery cell assembly, a sliding device, and a charging and discharging terminal; an output port is opened on the side wall of the housing; the battery cell assembly is installed in the housing; the sliding device is installed on the housing; the charging and discharging terminal is installed on the sliding device, the charging and discharging terminal has an input end and an output end, the input end is electrically connected to the battery cell assembly through a flexible wire, and the charging and discharging terminal is slidably installed on the housing through the sliding device so that the output end can slide and adjust within the output port.

[0005] In one embodiment, the housing includes an outer shell and a clamping plate, the clamping plate is detachably installed in the outer shell, the clamping plate divides the internal space of the outer shell into a first cavity and a second cavity, the battery cell assembly is installed in the first cavity, the sliding device and the charging and discharging terminal are installed in the second cavity, and the sliding device is installed on the side of the clamping plate facing away from the battery cell assembly.

[0006] In one embodiment, the sliding device includes a slide rail and a slider, the slide rail is installed on the side of the clamping plate facing away from the battery cell assembly, the slider is slidably installed on the slide rail, an installation cavity is opened on the side of the slider facing away from the slide rail, and the charging and discharging terminal is arranged in the installation cavity.

[0007] In one embodiment, the installation cavity is provided with an opening for inserting the charging and discharging terminals on a side facing the output port, and the sliding block is provided with a through groove on a side away from the slide rail, wherein the through groove is connected to the installation cavity, and the soft wire can enter the installation cavity through the through groove and slide in the installation cavity.

[0008] In one embodiment, the battery cell assembly includes a plurality of stacked battery cells and a PCB board electrically connected to the battery cells, and the plurality of battery cells are connected in series by being electrically connected to the PCB board; each of the battery cells has a positive electrode sheet and a negative electrode sheet, and the positive electrode sheet corresponds to the negative electrode sheet one by one, and the PCB board is provided with a connecting sheet for connecting to the positive electrode sheet and the negative electrode sheet, and each connecting sheet corresponds to a group of the positive electrode sheet and the negative electrode sheet, and each group of the positive electrode sheet and the negative electrode sheet is fixedly connected to the same connecting sheet by laser welding.

[0009] In one embodiment, the PACK structure of the soft-pack lithium battery further includes a cable tie, and the cable tie is disposed around the periphery of the plurality of battery cells to bundle the plurality of battery cells.

[0010] In one embodiment, the PACK structure of the soft-pack lithium battery also includes a fuse and a battery management system, the soft wire includes a positive wire and a negative wire, the positive wire includes a first positive wire and a second positive wire, the negative wire includes a first negative wire and a second negative wire; one end of the first positive wire is connected to one of the positive electrodes, and the other end is connected to the fuse, one end of the second positive wire is connected to the fuse, and the other end is connected to the input end; one end of the first negative wire is connected to one of the negative electrodes, and the other end is connected to the battery management system; one end of the second negative wire is connected to the battery management system, and the other end is connected to the input end.

[0011] In one embodiment, the battery cell assembly further includes an inner shell, which is disposed around the battery cell assembly, and has a notch so that the first positive line and the first negative line can pass through the notch to connect the fuse and the battery management system.

[0012] In one embodiment, the PACK structure of the soft-pack lithium battery further includes a shockproof component, and the shockproof component is arranged between the battery cell assembly and the inner shell.

[0013] In one embodiment, the PACK structure of the soft-pack lithium battery further includes a handle, and the handle is fixedly connected to the outer side wall of the shell.

[0014] The technical solution of the present invention is to set a battery cell assembly and charge and discharge terminals electrically connected to the battery cell assembly inside the PACK structure of the soft-pack lithium battery, so that the battery cell assembly can be electrically connected to an external device through the charge and discharge terminals; by setting a sliding device and installing the charge and discharge terminals on the sliding device, the charge and discharge terminals can be slidably installed inside the housing through the sliding device, so that the charge and discharge terminals can adjust their positions according to the actual usage situation. When the power-taking port opened by the external device is inconsistent with the preset current output port of the lithium battery, the operator can slide the charge and discharge terminals to the position corresponding to the power-taking port through the sliding device, making the position of the charge and discharge terminals adjustable relative to the structure inside, thereby improving the adaptability of the lithium battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0016] Figure 1 It is a schematic structural diagram of an embodiment of the PACK structure of the soft-pack lithium battery provided by the present invention;

[0017] Figure 2 It is a schematic structural diagram of another embodiment of the PACK structure of the soft-pack lithium battery provided by the present invention;

[0018] Figure 3 It is an exploded view of another embodiment of the PACK structure of the soft-pack lithium battery provided by the present invention.

[0019] Explanation of the reference numerals in the drawings:

[0020] 100, PACK structure of the soft-pack lithium battery; 1, housing; 11, output port; 12, outer shell; 13, clamping plate; 14, handle; 2, battery cell assembly; 21, battery cell; 211, positive electrode plate; 212, negative electrode plate; 22, PCB board; 221, connecting piece; 23, inner shell; 231, notch; 3, sliding device; 31, slide rail; 32, slider; 33, through groove; 4, charge and discharge terminals; 41, input end; 42, output end; 5, fuse; 6, battery management system; 7, shockproof member; 8, cable tie.

[0021] The realization of the object, functional features and advantages of the present invention will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0023] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0024] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] A soft-pack battery cell generally refers to a lithium battery cell encapsulated with an aluminum-plastic composite film on the outside. Due to its advantages such as light weight, low mold opening cost, and high safety, its market share is gradually expanding. Lithium batteries are widely used in power systems, especially in various electric transportation vehicle systems such as electric bicycles, electric forklifts, and electric scooters, etc. In order to ensure sufficient power intensity for the power system, multiple soft-pack battery cells are usually connected in series and stacked to form a soft-pack lithium battery and then put into use in the equipment.

[0026] In general electric transportation equipment, such as electric forklifts and electric bicycles, the battery is fixedly installed by opening a battery compartment in the equipment, and a through hole corresponding to the position of the charging and discharging terminals is opened on the side wall of the battery compartment to draw power. This through hole is the power-taking port. By inserting a plug through the power-taking port and inserting it into the charging and discharging terminals of the soft-pack lithium battery, power is supplied to the electric transportation equipment.

[0027] In existing soft-pack lithium batteries, the charge and discharge terminals for external devices to access are fixedly connected to the internal cell structure during production and cannot be repositioned after the housing assembly is completed. External devices that need power supply need to open corresponding power-taking ports at their corresponding positions according to the actual positions of the charge and discharge terminals in the soft-pack lithium battery. If the position or size of the opened power-taking port is incorrect, it is likely that the plug cannot be inserted into the charge and discharge terminals through the power-taking port to obtain power, and the soft-pack lithium battery will not be able to be used because it cannot be adapted to the device.

[0028] The present invention provides a PACK structure 100 for a soft-pack lithium battery.

[0029] Please refer to Figures 1-3 , in an embodiment of the present invention, the PACK structure 100 of the soft-pack lithium battery includes: a housing 1, a cell assembly 2, a sliding device 3, and a charge and discharge terminal 4; an output port 11 is opened on the side wall of the housing 1; the cell assembly 2 is installed in the housing 1; the sliding device 3 is installed on the housing 1; the charge and discharge terminal 4 is installed on the sliding device 3. The charge and discharge terminal 4 has an input end 41 and an output end 42. The input end 41 is electrically connected to the cell assembly 2 through a flexible wire. The charge and discharge terminal 4 is slidably installed on the housing 1 through the sliding device 3 so that the output end 42 can be slidably adjusted within the output port 11.

[0030] In this embodiment, the housing 1 serves as the foundation of the entire structure, protecting the internal battery cell assembly 2 and electrical connections. The output port 11 opened on its sidewall enables the charge and discharge terminal 4 to be electrically connected to external devices when needed, providing power for external devices. It can even extend out of the housing 1 for easy connection to external charging devices, and can be completely or partially hidden inside the housing 1 in the non-use state to maintain the overall aesthetics and safety. The charge and discharge terminal 4 can both discharge to external devices and charge itself by connecting to a charger. When a plug of an external device that needs to draw power is inserted into the input port 41, the PACK structure 100 of the soft-pack lithium battery is in a discharging state to supply power to the external device. When the power is exhausted, connecting the input end 41 to a charger can charge the battery cell assembly 2 so that it can regain the power supply function to supply power to external devices. The battery cell assembly 2 is the core part of the lithium battery, responsible for storing and releasing electrical energy. It is installed inside the housing 1 and is connected to the charge and discharge terminal 4 through a flexible wire to achieve the transmission of electrical energy through the flexible wire. The flexible wire has a certain degree of flexibility to adapt to the position change of the charge and discharge terminal 4 during the sliding process. The sliding device 3 is installed on the housing 1, providing a slidable platform for the charge and discharge terminal 4. Through the sliding device 3, the charge and discharge terminal 4 can slide along a preset track inside the housing 1 to adjust the position of its output end 42 inside the output port 11. The sliding device 3 can also limit the sliding range of the charge and discharge terminal 4 to restrict its sliding within the range of the output port 11. The sliding device 3 can make the process of external device power taking more flexible and convenient, especially in cases where space is limited or charging devices need to be frequently replaced. When the PACK structure 100 of the soft-pack lithium battery is installed in other devices that need power supply, even if there are certain deviations in the positions of the power taking ports due to different specifications of the devices, the charge and discharge terminal 4 can adjust its own position within a certain range to adapt to more types of devices.

[0031] In this embodiment, the housing 1 has a cover and a body. The body has a cavity with an open side for installing the battery cell assembly 2, and the cover covers the opening. The battery cell assembly 2 connected with the charge and discharge terminals 4 is installed inside the housing 1 through colloid connection. After the battery cell assembly 2 is placed in the cavity, colloid is filled. In this embodiment, AB glue is used for filling. AB glue hardens through the mixing of two liquids. One liquid is the base glue (A glue), and the other liquid is the hardener (B glue). The two liquids can only harden when mixed, and it does not rely on temperature to harden. Therefore, it is a kind of room-temperature hardening glue. AB glue has a high-strength bonding ability. At the same time, its cured product has good insulation, compression resistance performance, and a low shrinkage rate. It is not easy to form gaps after curing, resulting in a large amount of water vapor and dust entering and damaging the battery cell assembly 2. After the AB glue is cured, it can waterproof and seal the battery cell module, and at the same time can play the roles of shock absorption, sealing, heat dissipation, and fixing. It is a good adhesive for electrical components. After the colloid filling is completed and cured, at this time, the charge and discharge terminals 4 are electrically connected to the battery cell assembly 2 through flexible wires. Only part of the flexible wires is fixed by the colloid, and the remaining parts that are not encapsulated by the colloid, together with the charge and discharge terminals 4, can still be movably arranged in the housing 1. At this time, the sliding device 3 is fixed in the housing 1, and then the charge and discharge terminals 4 are installed on the sliding device 3, and the charge and discharge terminals 4 can be driven to slide by the sliding device 3. After the installation is completed, the cover is covered on the opening of the cavity of the body and connected by threaded fasteners, and the assembly of the PACK structure 100 of the soft-pack lithium battery can be completed. An output port 11 corresponding to the position of the charge and discharge terminals 4 is pre-opened on the outer side wall of the housing 1. The output port 11 is strip-shaped, and its length is set according to the adjustable range of the charge and discharge terminals 4, and its width is the same as the width of the charge and discharge terminals 4.

[0032] The technical solution of the present invention enables the battery cell assembly 2 to supply power to external devices through the charge and discharge terminals 4 by arranging the battery cell assembly 2 and the charge and discharge terminals 4 electrically connected to the battery cell assembly 2 in the PACK structure 100 of the soft-pack lithium battery; by setting the sliding device 3 and connecting the charge and discharge terminals 4 with the sliding device 3, the charge and discharge terminals 4 can be slidably installed in the housing 1 through the sliding device 3, so that the charge and discharge terminals 4 can adjust their positions according to the actual usage situation. When the power-taking port opened on the external device is inconsistent with the preset current output port 11 of the lithium battery, the operator can slide the charge and discharge terminals 4 to the position corresponding to the power-taking port through the sliding device 3, so that the position of the charge and discharge terminals 4 relative to the structure can be adjusted, thereby improving the adaptability of the lithium battery. When the PACK structure 100 of the soft-pack lithium battery is replaced with other devices, since the position of the power-taking port may not be pre-opened at the position corresponding to the original charge and discharge terminals 4, the charge and discharge terminals 4 can be adjusted to the position where they can be charged through the sliding device 3 to adapt to different specifications of devices within a certain range.

[0033] In one embodiment, the housing 1 includes an outer shell 12 and a clamping plate 13. The clamping plate 13 is detachably installed inside the outer shell 12. The clamping plate 13 divides the internal space of the outer shell 12 into a first cavity and a second cavity. The battery cell assembly 2 is installed in the first cavity, and the sliding device 3 and the charge and discharge terminals 4 are installed in the second cavity. The sliding device 3 is installed on the side of the clamping plate 13 facing away from the battery cell assembly 2. The clamping plate 13 is used to isolate the electronic components in the first cavity and the second cavity. After the battery cell assembly 2 is installed in the second cavity, the clamping plate 13 covers the second cavity through threaded fasteners. There is a gap between the clamping plate 13 and the outer shell 12. The flexible wire connected to the charge and discharge terminals 4 can maintain the connection with the battery cell assembly 2 through this gap. At the same time, this gap is also used for filling the colloid. After the colloid fills the second cavity through the gap, the clamping plate 13 can isolate the solidified colloid from the first cavity to prevent the colloid from affecting the sliding of the charge and discharge terminals 4 on the sliding device 3.

[0034] Referring to Figure 2 , in one embodiment, the sliding device 3 includes a slide rail 31 and a slider 32. The slide rail 31 is installed on the side of the clamping plate 13 facing away from the battery cell assembly 2. The slider 32 is slidably installed on the slide rail 31. An installation cavity is provided on the side of the slider 32 facing away from the slide rail 31, and the charge and discharge terminals 4 are arranged in the installation cavity. The slide rail 31 is installed on the side of the clamping plate 13 facing away from the battery cell assembly 2 through threaded fasteners. A chute with a special shape is provided on the side of the slide rail 31 facing away from the clamping plate 13. The slider 32 has a protrusion corresponding to the shape of the chute, so that the slider 32 can slide in the slide rail 31 and will not fall out of the slide rail 31. Stopper blocks can also be added at both ends of the slide rail 31 after the slider 32 is installed in the slide rail 31 to prevent the slider 32 from sliding out of the slide rail 31. An installation cavity for installing the charge and discharge terminals 4 is provided on the side of the slider 32 facing away from the slide rail 31. The installation cavity extends in a direction perpendicular to the slide rail 31, so that the charge and discharge terminals 4 can slide and adjust their positions in the installation cavity in a direction perpendicular to the guide rail, enabling the charge and discharge terminals 4 to extend out of the output port 11 through sliding. When the charging cable of an external device is not long enough to reach the charge and discharge terminals 4, the charge and discharge terminals 4 can be extended a certain distance to facilitate their connection with the charging plug. In addition, since the power transportation device fixes and installs the battery by opening a battery compartment in the device and takes power through a through hole corresponding to the position of the charge and discharge terminals 4, that is, a power take-off port, on the side wall of the battery compartment. Therefore, when charging is required, the charge and discharge terminals 4 are pulled out and passed through the power take-off port, and the charge and discharge terminals 4 can be erected on the wall of the power take-off port to prevent the charge and discharge terminals 4 from falling, facilitating the alignment and connection of the plug with the charge and discharge terminals 4.

[0035] In one embodiment, an opening is provided on the side of the installation cavity facing the output port 11. The charge and discharge terminal 4 is inserted into the installation cavity through the opening. A through groove 33 is provided on the side of the slider 32 facing away from the slide rail 31. The through groove 33 communicates with the installation cavity. The flexible wire can enter the installation cavity through the through groove 33 and slide within the installation cavity. The installation groove enters the installation cavity through the open opening, and then continues to slide until the input end 41 of the charge and discharge terminal 4 abuts against the bottom wall of the installation cavity. Among them, a through hole for the flexible wire to pass through is provided on the bottom wall, and the size of the through hole is smaller than the outer contour size of the charge and discharge terminal 4 to ensure the connection between the flexible wire and the charge and discharge terminal 4, and at the same time, the charge and discharge terminal 4 can be limited by the bottom wall of the installation cavity. Since the input end 41 of the charge and discharge terminal 4 is connected to the flexible wire, and the flexible wire is connected to the battery cell assembly 2, therefore, a through groove 33 for the flexible wire to enter is provided on the side of the slider 32 facing away from the slide rail 31. During installation, first pass the flexible wire into the installation cavity through the through groove 33, and then insert the charge and discharge terminal 4 into the installation cavity through the opening, and the installation of the charge and discharge terminal 4 can be completed. In other embodiments, the charge and discharge terminal 4 can also be first inserted into the installation cavity and then the flexible wire is connected, in which case there is no need to provide the through groove 33, and the charge and discharge terminal 4 can also be inserted into the installation cavity. With such a setting, the charge and discharge terminal 4 can slide both along the direction of the slide rail 31 and along the opening direction of the installation cavity, and the operator can adjust the position of the charge and discharge terminal 4 in two dimensions, improving the adaptability of the lithium battery.

[0036] Refer to Figure 3, in one embodiment, the battery cell assembly 2 includes a plurality of stacked battery cells 21 and a PCB board 22 electrically connected to the battery cells 21. The plurality of battery cells 21 are connected in series by electrically connecting the PCB board 22. Each battery cell 21 has a positive electrode tab 211 and a negative electrode tab 212, and the positive electrode tabs 211 correspond to the negative electrode tabs 212 one by one. The PCB board 22 is provided with connection tabs 221 for connecting to the positive electrode tabs 211 and the negative electrode tabs 212. Each connection tab 221 corresponds to a set of positive electrode tab 211 and negative electrode tab 212, and each set of positive electrode tab 211 and negative electrode tab 212 is fixedly connected to the same connection tab 221 by laser welding. The connection tabs 221 are arranged at intervals and fixedly installed in the PCB board 22. The connection tabs 221 are arranged on the side of the PCB board 22 facing away from the battery cell assembly 2. Long strip holes for the positive electrode tabs 211 and the negative electrode tabs 212 to pass through are provided on both sides of each connection tab 221. The positive electrode tabs 211 and the negative electrode tabs 212 pass through the long strip holes to be connected to the connection tabs 221, and the connection tabs 221 are fixedly connected to the positive electrode tabs 211 and the negative electrode tabs 212 by laser welding to ensure that the plurality of soft-pack battery cells 21 can be continuously connected in series to ensure sufficient voltage output. In this embodiment, the positive electrode tabs, the negative electrode tabs and the connection tabs are made of copper sheets. The copper material has good ductility, so that the connection tabs made of copper sheets are easily bent into different shapes to facilitate welding the positive electrode tabs and the negative electrode tabs to the connection tabs at the same time. In addition, the copper material also has good corrosion resistance, which can extend the service life of the device.

[0037] Refer to Figure 3 , in one embodiment, the PACK structure 100 of the soft-pack lithium battery further includes a tie strap 8, and the tie strap 8 surrounds the periphery of the plurality of battery cells 21 to bundle the plurality of battery cells 21. The tie strap 8 is used to bundle the stacked soft-pack battery cells 21 together to prevent them from shifting and can reduce their occupied space. In this embodiment, the tie strap 8 is made of glass fiber material. Glass fiber has properties such as high strength, insulation, high temperature resistance, and corrosion resistance. Using the glass fiber tie strap 8 to bundle the battery cells 21 can improve the safety and reliability of the battery cell assembly 2. Multiple glass fiber tie straps 8 can be arranged at intervals as needed to fix the multiple battery cells 21 more firmly together.

[0038] In one embodiment, the PACK structure 100 of the soft-pack lithium battery further includes a fuse 5 and a battery management system 6. The soft wire includes a positive wire and a negative wire. The positive wire includes a first positive wire and a second positive wire, and the negative wire includes a first negative wire and a second negative wire. One end of the first positive wire is connected to one of the positive electrodes 211, and the other end is connected to the fuse 5. One end of the second positive wire is connected to the fuse 5, and the other end is connected to the input terminal 41. One end of the first negative wire is connected to one of the negative electrodes 212, and the other end is connected to the battery management system 6. One end of the second negative wire is connected to the battery management system 6, and the other end is connected to the input terminal 41. The fuse 5 is used to protect the PACK structure 100 of the soft-pack lithium battery. When the current exceeds the specified value, the heat generated by the internal melt itself can melt the melt, thereby disconnecting the circuit, thereby protecting other electronic components and electrical equipment from damage caused by overload and short-circuit current. The battery management system 6 is used to monitor the state of the battery, manage the battery charging and discharging process, protect the battery safety, and extend the battery life. By setting a fuse 5 on the positive line and a battery management system 6 on the negative line, the PACK structure 100 of the soft-pack lithium battery can be further protected. Even when the current is overloaded, the circuit can be disconnected immediately to protect the internal battery cell 21 so that it can continue to be used after reconnection, and the battery cell 21 can be prevented from being damaged and increasing the difficulty of handling.

[0039] In one embodiment, the battery cell assembly 2 further includes an inner shell 23, which is arranged around the outer periphery of the battery cell assembly 2, and has a notch 231, so that the first positive line and the first negative line can pass through the notch 231 to connect the fuse 5 and the battery management system 6. The inner shell 23 is assembled with an epoxy resin board, which is a polymer material with excellent performance. The epoxy resin board is made to enclose the outer side of the battery cell assembly 2 to form the inner shell 23, which can enhance the protection of the battery cell 21. Among them, a notch 231 is opened at one place of the inner shell 23, and the notch 231 is used for the first positive line and the first negative line to pass through, so that the first positive line and the first negative line can be partially not sealed by the colloid when the colloid is filled, thereby ensuring that the charge and discharge terminals 4 connected thereto can be slidably adjusted, and ensuring the activity performance of the charge and discharge terminals 4. After the inner shell 23 wraps the battery cell 21, it is loaded into the first cavity and fixedly installed with the outer shell 12 through the colloid.

[0040] In one embodiment, the PACK structure 100 of the soft-pack lithium battery further includes a shockproof member 7, which is disposed between the battery cell assembly 2 and the inner shell 23. In this embodiment, the shockproof member 7 is made of EVA foam material, which has good elasticity, can effectively absorb impact force, and provide buffering and protection, thereby protecting the battery cell 21 from being damaged during transportation. In the process of filling AB glue after the battery cell assembly is loaded into the shell, the shockproof member can also occupy part of the space in the first cavity, thereby reducing the amount of glue filling and improving environmental protection.

[0041] In one embodiment, the PACK structure 100 of the soft-pack lithium battery further includes a handle 14, and the handle 14 is fixedly connected to the outer side wall of the housing 1. The handle 14 is used to transfer the PACK structure 100 of the soft-pack lithium battery. Since many power transportation devices are designed to prevent the lithium battery from shaking, the size of the battery compartment provided in the structure is basically similar to the size of the PACK structure 100 of the soft-pack lithium battery to limit it. The provision of the handle 14 can provide a force application point for the structure, facilitating the replacement or transfer of the PACK structure 100 of the soft-pack lithium battery.

[0042] The above is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A PACK structure of a soft-pack lithium battery, characterized in that: include: A shell, wherein a side wall of the shell is provided with an output port; A battery cell assembly is installed in the housing; A sliding device, mounted on the housing; as well as A charge and discharge terminal is installed on the sliding device, the charge and discharge terminal has an input end and an output end, the input end is electrically connected to the battery core assembly through a flexible wire, and the charge and discharge terminal is slidably installed on the housing through the sliding device so that the output end can be slidably adjusted in the output port; The housing comprises an outer shell and a clamping plate, wherein the clamping plate is detachably mounted in the outer shell, and the clamping plate divides the inner space of the outer shell into a first cavity and a second cavity, wherein the battery cell assembly is mounted in the first cavity, and the sliding device and the charge and discharge terminals are mounted in the second cavity, and the sliding device is mounted on a side of the clamping plate away from the battery cell assembly; The sliding device comprises a slide rail and a slider, wherein the slide rail is mounted on a side of the clamping plate away from the battery core assembly, and the slider is slidably mounted on the slide rail, and a mounting cavity is provided on a side of the slider away from the slide rail, and the charging and discharging terminals are arranged in the mounting cavity; The installation cavity is provided with an opening for installing the charging and discharging terminals on a side facing the output port, and the sliding block is provided with a through slot on a side away from the slide rail, the through slot is connected to the installation cavity, and the soft wire can enter the installation cavity through the through slot and slide in the installation cavity.

2. The PACK structure of the soft-pack lithium battery according to claim 1, characterized in that: The battery cell assembly includes a plurality of stacked battery cells and a PCB board electrically connected to the battery cells, and the plurality of battery cells are connected in series by being electrically connected to the PCB board; each of the battery cells has a positive electrode sheet and a negative electrode sheet, and the positive electrode sheet corresponds to the negative electrode sheet one by one, and the PCB board is provided with a connecting sheet for connecting to the positive electrode sheet and the negative electrode sheet, and each connecting sheet corresponds to a group of the positive electrode sheet and the negative electrode sheet, and each group of the positive electrode sheet and the negative electrode sheet is fixedly connected to the same connecting sheet by laser welding.

3. The PACK structure of the soft-pack lithium battery according to claim 2, characterized in that: The PACK structure of the soft-pack lithium battery further includes a cable tie, which is arranged around the outer periphery of the plurality of battery cells to bundle the plurality of battery cells.

4. The PACK structure of the soft-pack lithium battery according to claim 2, characterized in that: The PACK structure of the soft-pack lithium battery further includes a fuse and a battery management system, the soft wire includes a positive wire and a negative wire, the positive wire includes a first positive wire and a second positive wire, and the negative wire includes a first negative wire and a second negative wire; One end of the first positive line is connected to one of the positive plates, and the other end is connected to the fuse; one end of the second positive line is connected to the fuse, and the other end is connected to the input terminal; One end of the first negative line is connected to one of the negative plates, and the other end is connected to the battery management system; one end of the second negative line is connected to the battery management system, and the other end is connected to the input end.

5. The PACK structure of the soft-pack lithium battery according to claim 4, characterized in that: The battery cell assembly also includes an inner shell, which is disposed around the outer periphery of the battery cell assembly. The inner shell has a notch so that the first positive line and the first negative line can pass through the notch to connect the fuse and the battery management system.

6. The PACK structure of the soft-pack lithium battery according to claim 5, characterized in that: The PACK structure of the soft-pack lithium battery further includes a shockproof component, which is arranged between the battery cell assembly and the inner shell.

7. The PACK structure of the soft-pack lithium battery according to any one of claims 1 to 6, characterized in that: The PACK structure of the soft-pack lithium battery also includes a handle, and the handle is fixedly connected to the outer side wall of the shell.

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