PACK structure of soft package lithium battery

Abstract

The invention discloses a PACK structure of a soft package lithium battery, and relates to the technical field of lithium batteries, and the PACK structure of the soft package lithium battery comprises a shell, a battery cell assembly, a sliding device and a charging and discharging terminal; an output port is formed in the side wall of the shell; the battery core assembly is mounted in the shell; the sliding device is mounted on the shell; the charging and discharging terminal is installed on the sliding device, the charging and discharging terminal is provided with an input end and an output end, the input end is electrically connected with the battery core assembly through a flexible wire, and the charging and discharging terminal is installed on the shell in a sliding mode through the sliding device so that the output end can be adjusted in the output port in a sliding mode; according to the technical scheme provided by the invention, the sliding device is arranged in the structure, and the charging and discharging terminal is connected with the sliding device, so that the charging and discharging terminal can be slidably mounted in the shell through the sliding device, the position of the charging and discharging terminal relative to the interior of the structure is adjustable, and the adaptability of the lithium battery is improved.

Description

Technical Field

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

[0002] Soft-pack cells usually refer to lithium battery cells whose outer shell is an aluminum-plastic composite film package. Due to its light weight, low mold cost, and high safety, its market share is gradually expanding. Lithium batteries are widely used in power systems, especially various electric transportation vehicle systems such as electric bicycles, electric forklifts, and electric scooters. In order to ensure that sufficient power intensity is provided to the power system, multiple soft-pack cells are usually connected in series and stacked to form a soft-pack lithium battery, which is then put into use in the equipment. In existing soft-pack lithium batteries, the charging and discharging terminals for external equipment access cannot be adjusted after assembly. If the corresponding power intake port is not opened at the corresponding position on the transportation device, it is easy to cause the plug to be unable to be inserted into the charging and discharging terminals to draw power. Summary of the invention

[0003] The main purpose 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-mentioned purpose, the PACK structure of the soft-pack lithium battery proposed in the present invention includes: a shell, a battery cell assembly, a sliding device and a charge and discharge terminal; the side wall of the shell is provided with an output port; the battery cell assembly is installed in the shell; the sliding device is installed in the shell; the charge and discharge terminal is installed in 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 cell assembly through a soft wire, and the charge and discharge terminal is slidably installed in the shell through the sliding device, so that the output end can be slidably adjusted in the output port.

[0005] In one embodiment, the shell 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 charge and discharge terminals are installed in the second cavity, and the sliding device is installed on the side of the clamping plate 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 away from the battery cell assembly, the slider is slidably installed on the slide rail, and an installation cavity is opened on the side of the slider away from the slide rail, and the charging and discharging terminals are 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 a charge and discharge terminal electrically connected to the battery cell assembly in 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 terminal; by setting a sliding device and installing the charge and discharge terminal on the sliding device, the charge and discharge terminal can be slidably installed in the shell through the sliding device, so that the charge and discharge terminal can adjust the position according to actual usage. When the power intake 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 terminal to the position corresponding to the power intake port through the sliding device, so that the position of the charge and discharge terminal relative to the structure can be adjusted, thereby improving the adaptability of the lithium battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

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

[0017] Figure 2 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 An exploded view of another embodiment of the PACK structure of the soft-pack lithium battery provided by the present invention.

[0019] Description of Figure Numbers:

[0020] 100. PACK structure of soft-pack lithium battery; 1. Shell; 11. Output port; 12. Outer shell; 13. Clamp; 14. Handle; 2. Cell assembly; 21. Cell; 211. Positive electrode; 212. Negative electrode; 22. PCB board; 221. Connecting piece; 23. Inner shell; 231. Notch; 3. Sliding device; 31. Slide rail; 32. Slider; 33. Through slot; 4. Charge and discharge terminals; 41. Input terminal; 42. Output terminal; 5. Fuse; 6. Battery management system; 7. Shockproof parts; 8. Cable tie.

[0021] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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 creative work are within the scope of protection of the present invention.

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

[0024] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] Soft-pack cells usually refer to lithium battery cells that are encapsulated with aluminum-plastic composite films. Due to its 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. In order to ensure that the power system is provided with sufficient power intensity, multiple soft-pack cells are usually connected in series and stacked to form soft-pack lithium batteries, which are then put into use in the equipment.

[0026] In general electric transportation equipment, such as electric forklifts and electric bicycles, a battery compartment is opened in the equipment to fix the battery, 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. The through hole is the power intake port, and the power transportation equipment is powered by inserting a plug through the power intake port into the charging and discharging terminals of the soft-pack lithium battery.

[0027] In existing soft-pack lithium batteries, the charging and discharging terminals for external equipment access are fixedly connected to the internal battery cell structure during production, and their position cannot be adjusted after the shell is assembled. External equipment that needs to be powered needs to open corresponding power intake ports at corresponding positions of itself according to the actual positions of the charging and discharging terminals in the soft-pack lithium battery. If the position or size of the opened power intake port is incorrect, it is easy for the plug to be unable to be inserted into the charging and discharging terminals from the power intake port to draw power, and the soft-pack lithium battery will become unusable because it cannot adapt to the equipment.

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

[0029] See also Figure 1-3 In one embodiment of the present invention, the PACK structure 100 of the soft-pack lithium battery includes: a shell 1, a battery cell assembly 2, a sliding device 3 and a charge and discharge terminal 4; the side wall of the shell 1 is provided with an output port 11; the battery cell assembly 2 is installed in the shell 1; the sliding device 3 is installed in the shell 1; the charge and discharge terminal 4 is installed in the sliding device 3, and the charge and discharge terminal 4 has an input terminal 41 and an output terminal 42, the input terminal 41 is electrically connected to the battery cell assembly 2 through a soft wire, and the charge and discharge terminal 4 is slidably installed in the shell 1 through the sliding device 3, so that the output terminal 42 can be slidably adjusted in the output port 11.

[0030] In this embodiment, the shell 1 serves as the basis of the entire structure, protecting the internal battery cell assembly 2 and electrical connections. The output port 11 provided on the side wall enables the charge and discharge terminal 4 to be electrically connected to the device outside the shell 1 when necessary, so as to provide power to the device outside the shell 1, and even to extend outside the shell 1, so as to facilitate connection with an external charging device. When not in use, it can be completely or partially hidden in the shell 1 to maintain the overall beauty and safety. The charge and discharge terminal 4 can both discharge to the external device and charge itself by connecting to the charger; when the external device that needs to take power inserts the plug into the input port 41, the PACK structure 100 of the soft-pack lithium battery is in a discharge state and supplies power to the external device; when the power is exhausted, the input terminal 41 is connected to the charger, and the battery cell assembly 2 can be charged so that it can have the power supply function again to supply power to the external device. The battery cell assembly 2 is the core part of the lithium battery, responsible for storing and releasing electrical energy. It is installed in the shell 1, connected to the charge and discharge terminal 4 through a soft wire, and the transmission of electrical energy is realized through the soft wire. The soft wire has a certain flexibility and can adapt to the position change of the charge and discharge terminal 4 during the sliding process. The sliding device 3 is installed on the shell 1 to provide a sliding platform for the charge and discharge terminal 4. Through the sliding device 3, the charge and discharge terminal 4 can slide along a preset trajectory in the shell 1, so as to adjust the position of its output end 42 in the output port 11. The sliding device 3 can also limit the sliding range of the charge and discharge terminal 4 to limit it to slide within the range of the output port 11. The sliding device 3 can make the process of external equipment drawing power more flexible and convenient, especially when space is limited or charging equipment needs to be replaced frequently. When the PACK structure 100 of the soft-pack lithium battery is loaded into other devices that need to be powered, even if the position of the power port is opened due to different specifications of the equipment, there is a certain deviation, the charge and discharge terminal 4 can adjust its own position within a certain range, so as to adapt to more types of equipment.

[0031] In this embodiment, the shell 1 has a cover and a body, and the body has a cavity with one side open for installing the battery cell assembly 2, and the cover covers the open cavity. The battery cell assembly 2 connected with the charge and discharge terminals 4 is installed inside the shell 1 through the colloid connection, and after the battery cell assembly 2 is placed in the cavity, the colloid is filled; in this embodiment, AB glue is used for filling, and the AB glue is hardened by mixing two liquids, one liquid is the glue (A glue), and the other liquid is the hardener (B glue). The two liquids can only be hardened when mixed, and do not need to be hardened by temperature, so it is a kind of room temperature hardening glue; AB glue has high-strength bonding ability, and its cured product has good insulation and pressure resistance, and has 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 curing, the AB glue can waterproof and seal the battery module, and at the same time can play the role of shockproof, sealing, heat dissipation and fixing, and is a good electrical component bonding product. After the colloid is filled and solidified, the charge and discharge terminal 4 is electrically connected to the battery cell assembly 2 through the soft wire. Only part of the soft wire is fixed by the colloid, and the remaining part not encapsulated by the colloid together with the charge and discharge terminal 4 can still be movably arranged in the shell 1. At this time, the sliding device 3 is fixed in the shell 1, and then the charge and discharge terminal 4 is installed on the sliding device 3, and the charge and discharge terminal 4 can be driven to slide through the sliding device 3. After the installation is completed, the cover is set on the open part of the body cavity, and connected by threaded fasteners to complete the assembly of the PACK structure 100 of the soft-pack lithium battery. The outer wall of the shell 1 is pre-opened with an output port 11 corresponding to the position of the charge and discharge terminal 4. The output port 11 is in a long strip shape, and its length is set according to the adjustable range of the charge and discharge terminal 4, and its width is the same as the width of the charge and discharge terminal 4.

[0032] The technical solution of the present invention is to set a cell assembly 2 and a charge and discharge terminal 4 electrically connected to the cell assembly 2 in the PACK structure 100 of the soft-pack lithium battery, so that the cell assembly 2 can supply power to the external device through the charge and discharge terminal 4; by setting a sliding device 3 and connecting the charge and discharge terminal 4 to the sliding device 3, the charge and discharge terminal 4 can be slidably installed in the housing 1 through the sliding device 3, so that the charge and discharge terminal 4 can adjust the position according to the actual use situation. When the power intake port opened by the external device is inconsistent with the current output port 11 preset by the lithium battery, the operator can slide the charge and discharge terminal 4 to the position corresponding to the power intake port through the sliding device 3, so that the position of the charge and discharge terminal 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 intake port may not be opened in advance at the position corresponding to the original charge and discharge terminal 4, the charge and discharge terminal 4 can be adjusted to a position where it can be charged through the sliding device 3 to adapt to devices of different specifications within a certain range.

[0033] In one embodiment, the housing 1 includes a shell 12 and a clamp 13. The clamp 13 is detachably installed in the shell 12. The clamp 13 divides the internal space of the shell 12 into a first cavity and a second cavity. The battery cell assembly 2 is installed in the first cavity, the sliding device 3 and the charge and discharge terminal 4 are installed in the second cavity, and the sliding device 3 is installed on the side of the clamp 13 away from the battery cell assembly 2. The clamp 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 clamp 13 is covered with a threaded fastener to close the second cavity. There is a gap between the clamp 13 and the shell 12. The soft wire connected to the charge and discharge terminal 4 can maintain the connection with the battery cell assembly 2 through the gap. At the same time, the gap is also used for filling the colloid. After the colloid fills the second cavity through the gap, the clamp 13 can isolate the solidified colloid from the first cavity to prevent the colloid from affecting the sliding of the charge and discharge terminal 4 on the sliding device 3.

[0034] See also 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 away from the battery cell assembly 2. The slider 32 is slidably installed on the slide rail 31. The side of the slider 32 away from the slide rail 31 is provided with an installation cavity, 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 away from the battery cell assembly 2 through a threaded fastener. The side of the slide rail 31 away from the clamping plate 13 is provided with a slide groove with a special shape. The slider 32 has a protrusion corresponding to the shape of the slide groove, so that the slider 32 can slide in the slide rail 31 without being adjusted out of the slide rail 31. Blocks can 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. The side of the slider 32 away from the slide rail 31 is provided with an installation cavity for installing the charge and discharge terminal 4. The installation cavity is extended in a direction perpendicular to the slide rail 31, so that the charge and discharge terminal 4 can be slid in the installation cavity in a direction perpendicular to the guide rail to adjust the position, so that the charge and discharge terminal 4 can be extended out of the output port 11 by sliding. When the charging cable of the external device is not long enough and the charging plug cannot reach the charge and discharge terminal 4, the charge and discharge terminal 4 can be extended a certain distance to facilitate its connection with the charging plug. In addition, since the electric transportation equipment is fixedly installed by opening a battery compartment in the equipment, and a through hole corresponding to the position of the charge and discharge terminal 4 is opened on the side wall of the battery compartment to draw electricity, when charging is needed, the charge and discharge terminal 4 is pulled out and passed through the power taking port, and the charge and discharge terminal 4 can be mounted on the wall of the power taking port to prevent the charge and discharge terminal 4 from falling off, so as to facilitate the alignment and connection of the plug to the charge and discharge terminal 4.

[0035] In one embodiment, the installation cavity is provided with an opening on the side facing the output port 11, and the charge and discharge terminal 4 is installed in the installation cavity through the opening. The slider 32 is provided with a through slot 33 on the side facing away from the slide rail 31, and the through slot 33 is connected with the installation cavity, and the soft wire can enter the installation cavity through the through slot 33 and slide in the installation cavity. The installation slot 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, wherein the bottom wall is provided with a through hole for the soft wire to pass through, and the size of the through hole is smaller than the outer contour size of the charge and discharge terminal 4, so as to ensure the connection between the soft wire and the charge and discharge terminal 4, and 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 soft wire, and the soft wire is connected to the battery cell assembly 2, a through slot 33 for the soft wire to enter is provided on the side of the slider 32 away from the slide rail 31. During installation, the soft wire is first passed through the through slot 33 into the installation cavity, and then the charge and discharge terminal 4 is installed into the installation cavity through the opening, and the installation of the charge and discharge terminal 4 is completed. In other embodiments, the charge and discharge terminal 4 may be first installed into the installation cavity, and then the soft wire is connected, then there is no need to provide the through slot 33, and the charge and discharge terminal 4 may also be installed into the installation cavity. With such a configuration, the charge and discharge terminal 4 can slide both in the direction of the slide rail 31 and in the direction of the installation cavity. The operator can adjust the position of the charge and discharge terminal 4 from two dimensions, thereby improving the adaptability of the lithium battery.

[0036] See also Figure 3In 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, and the plurality of battery cells 21 are connected in series by being electrically connected to the PCB board 22; each battery cell 21 has a positive electrode sheet 211 and a negative electrode sheet 212, and the positive electrode sheet 211 corresponds to the negative electrode sheet 212 one by one, and the PCB board 22 is provided with a connecting sheet 221 for connecting to the positive electrode sheet 211 and the negative electrode sheet 212, and each connecting sheet 221 corresponds to a group of positive electrode sheets 211 and negative electrode sheets 212, and each group of positive electrode sheets 211 and negative electrode sheets 212 are fixedly connected to the same connecting sheet 221 by laser welding. The connecting pieces 221 are arranged at intervals and fixedly installed in the PCB board 22. The connecting pieces 221 are arranged on the side of the PCB board 22 away from the battery cell assembly 2. On both sides of each connecting piece 221, there are long strip holes for the positive electrode piece 211 and the negative electrode piece 212 to pass through. The positive electrode piece 211 and the negative electrode piece 212 pass through the long strip holes to connect with the connecting piece 221. The connecting piece 221 is fixedly connected with the positive electrode piece 211 and the negative electrode piece 212 by laser welding to ensure that multiple soft-pack batteries 21 can be continuously connected in series to ensure sufficient voltage output. In this embodiment, the positive electrode piece, the negative electrode piece and the connecting piece are made of copper sheets. The copper material has good ductility, so that the connecting piece made of copper sheets can be easily bent into different shapes, so that the positive electrode piece and the negative electrode piece can be welded to the connecting piece at the same time; in addition, the copper material also has good corrosion resistance, which can extend the service life of the equipment.

[0037] See also Figure 3 In one embodiment, the PACK structure 100 of the soft-pack lithium battery further includes a cable tie 8, which is arranged around the outer periphery of the plurality of battery cells 21 to bundle the plurality of battery cells 21. The cable tie 8 is used to bundle the stacked soft-pack battery cells 21 together to prevent them from shifting and to reduce the space they occupy. In this embodiment, the cable tie 8 is made of glass fiber, which has high strength, insulation, high temperature resistance, corrosion resistance and other properties. Using the glass fiber cable tie 8 to bundle the battery cells 21 can improve the safety and reliability of the battery cell assembly 2. A plurality of glass fiber cable ties 8 can be arranged at intervals as needed to more firmly fix the plurality of battery cells 21 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, which is fixedly connected to the outer 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 equipments have a battery compartment with a size that is substantially similar to the size of the PACK structure 100 of the soft-pack lithium battery in order to avoid the shaking of the lithium battery, so as to limit the position of the battery compartment, the handle 14 can be provided to lift the force application point of the structure, so as to facilitate the replacement or transfer of the PACK structure 100 of the soft-pack lithium battery.

[0042] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are 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, and 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 soft wire. The charge and discharge terminal is slidably installed on the shell through the sliding device so that the output end can be slidably adjusted in the output port.

2. The PACK structure of the soft-pack lithium battery according to claim 1, characterized in that: The shell includes an outer shell and a clamping plate, the clamping plate is detachably installed in the outer shell, the clamping plate divides the inner 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 charge and discharge terminals are installed in the second cavity, and the sliding device is installed on the side of the clamping plate away from the battery cell assembly.

3. The PACK structure of the soft-pack lithium battery according to claim 2, characterized in that: The sliding device includes a slide rail and a slider. The slide rail is installed on the side of the clamping plate 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 away from the slide rail. The charging and discharging terminals are arranged in the installation cavity.

4. The PACK structure of the soft-pack lithium battery according to claim 3, characterized in that: 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.

5. 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.

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 cable tie, which is arranged around the outer periphery of the plurality of battery cells to bundle the plurality of battery cells.

7. 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 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 end; 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.

8. The PACK structure of the soft-pack lithium battery according to claim 7, 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.

9. The PACK structure of the soft-pack lithium battery according to claim 8, 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.

10. The PACK structure of the soft-pack lithium battery according to any one of claims 1 to 9, 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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