Positioning device and positioning method for multi-layer stacked battery pack

Abstract

The positioning device comprises a base plate, at least one group of longitudinal adjusting mechanism is arranged on the transverse side edge of the base plate, the longitudinal adjusting mechanism is connected with a first partition plate capable of moving in the longitudinal direction of the base plate, at least one group of transverse adjusting mechanism is arranged on the longitudinal side edge of the base plate, and the first partition plate is connected with a second partition plate capable of moving in the longitudinal direction of the base plate. The transverse adjusting mechanism is connected with a second partition plate capable of transversely moving along the base plate, and the first partition plate and the second partition plate are arranged in the inner space of the base plate in a staggered mode so as to jointly define a containing unit used for containing a battery. According to the positioning device and the positioning method for the multi-layer stacked battery pack, the battery accommodating space can be freely divided through the partition plate system which can be flexibly adjusted, so that the lithium batteries with different sizes and different numbers can be adapted, the universality, the flexibility and the production efficiency of battery module assembly are improved, and the production cost is reduced. Therefore, the technical problems of poor universality and high application cost caused by a fixed structure in the prior art are solved.

Description

Technical Field

[0001] This invention belongs to the field of battery module assembly technology, and particularly relates to a positioning device and positioning method for a multi-layer stacked battery pack. Background Technology

[0002] With the rapid development of the new energy industry, lithium battery packs are widely used in various portable electronic devices. To meet different voltage and capacity requirements, multiple individual lithium batteries are typically integrated into a battery module through series and parallel connections. Ensuring that multiple battery cells are stably and neatly fixed within the module during this integration process has always been a key technical challenge in this field.

[0003] Currently, most common battery packs use pre-formed fixed substrates or frame structures to position the batteries. For example, Chinese utility model patent CN210897479U discloses a multi-layer stacked lithium battery structure that uses a substrate assembly with fixed-size placement slots, where each lithium battery is confined to its corresponding slot. While this fixed design achieves basic positioning, the inability to adjust the size, number, and arrangement of the slots on the substrate means that the assembly can only accommodate specific models and quantities of batteries. When production demands change and different specifications or quantities of batteries need to be assembled, the entire substrate must be replaced. This not only increases material costs but also severely reduces the flexibility and responsiveness of the production line, making it difficult to adapt to the growing trend of small-batch, multi-variety customized production.

[0004] Therefore, a positioning solution that can flexibly adapt to various battery sizes and arrangements is needed. Summary of the Invention

[0005] The purpose of this invention is to provide a positioning device and method for a multi-layer stacked battery pack. Through a flexibly adjustable separator system, the battery storage space can be freely divided, thereby adapting to lithium batteries of different sizes and quantities, improving the versatility, flexibility and production efficiency of battery module assembly, and thus solving the technical problems of poor versatility and high application cost caused by the fixed structure in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a positioning device for a multi-layer stacked battery pack, comprising a substrate, wherein at least one set of longitudinal adjustment mechanisms are provided on the lateral side of the substrate, the longitudinal adjustment mechanisms are connected to a first partition that can move longitudinally along the substrate, and at least one set of lateral adjustment mechanisms are provided on the longitudinal side of the substrate, the lateral adjustment mechanisms are connected to a second partition that can move laterally along the substrate, wherein the first partition and the second partition are arranged alternately in the internal space of the substrate to jointly enclose a receiving unit for placing batteries.

[0007] Preferably, both the longitudinal adjustment mechanism and the lateral adjustment mechanism include a guide component and a locking component. The first partition and the second partition are slidably connected to the substrate through the guide component, and the locking component is used to lock the first partition and the second partition in a preset position.

[0008] Preferably, the guide assembly includes a groove disposed on the inner wall of the substrate and a movable shaft disposed at both ends of the first partition and the second partition, wherein the end of the movable shaft is provided with a pulley that slides in cooperation with the groove.

[0009] Preferably, the locking assembly includes a positioning shaft disposed on the first partition and the second partition, a movable locking cap sleeved on the positioning shaft, and a plurality of connecting parts matching the locking cap on the outer side of the base plate. The locking cap and the connecting parts are connected by threads to lock the first partition and the second partition.

[0010] Preferably, a receiving groove is provided on the inner side of at least one side of the horizontal and vertical sides of the substrate, and the starting end of the sliding groove is connected to the receiving groove. In the non-use state, the first partition and the second partition can be completely stored in the receiving groove so that a complete cavity is formed in the center of the substrate.

[0011] Preferably, the substrate has a plurality of positioning grooves corresponding to the size of a general battery on its lateral and longitudinal sides, and the positioning grooves are connected to the sliding groove.

[0012] Preferably, the positioning shaft is provided with a handle, which can drive the first partition and the second partition to move within the substrate by operating the handle.

[0013] This invention provides a method of using the positioning device for the above-described multi-layer stacked battery pack, comprising the following steps: S1. A positioning device in a stowed state is provided, wherein the center of the substrate is a cavity; S2. Determine the number of rows and columns of the required housing units based on the size and specifications of the battery to be installed; S3. Drive the longitudinal adjustment mechanism to move the first partition along the longitudinal direction to the corresponding position and lock it, and drive the lateral adjustment mechanism to move the second partition along the lateral direction to the corresponding position and lock it, so as to form multiple accommodating units that match the size of the lithium battery. S4. Place the multiple batteries into the accommodating unit accordingly; S5. Install end cap assemblies at the top and bottom of the positioning device where the batteries have been placed, install heat dissipation protection plate assemblies on the side, connect all the batteries to each other, and connect their positive and negative electrodes to the heat dissipation protection plate assemblies to form the battery pack core assembly to complete the positioning of the batteries.

[0014] Preferably, when step S3 is performed, the first and second partitions are precisely positioned according to the preset positioning grooves to fit a battery of a universal size.

[0015] Preferably, the method is applicable to cylindrical or prismatic lithium batteries of different capacity specifications.

[0016] Compared with the prior art, the present invention has the following advantages through the above technical solution: By setting a substrate for accommodating batteries and serving as a supporting structure, and by setting a first partition and a second partition driven by a longitudinal adjustment mechanism and a transverse adjustment mechanism respectively on the inner side of the transverse and longitudinal sides of the substrate, the size and arrangement of the accommodating units can be freely defined through the movable longitudinal and transverse arrangement of the first and second partitions during use, thereby adapting to various cylindrical or square lithium batteries of different diameters, lengths, and widths, achieving multiple uses for one board. Furthermore, the above structure is more flexible in the battery pack assembly process. Specifically, in production, there is no need to customize different fixed substrates for each battery specification, reducing material costs while increasing the flexibility and response speed of the production line, making it suitable for small-batch, multi-variety customized production.

[0017] In addition, by opening a storage groove on the inner side of the substrate, the first and second partitions on the substrate can be completely stored in their horizontal and vertical side grooves when the substrate is not in use. This allows the substrate to maintain its most basic simple structure during storage and transportation, while it can be quickly unfolded to form a positioning structure when in use, making operation convenient. At the same time, by setting up mutually cooperating guide components and locking components, combined with preset positioning grooves or scale markings, the accuracy and reliability of the movement path and locking of the first and second partitions can be ensured, thereby ensuring that the batteries are neatly arranged, have stable contact, and have structural strength for overall connection.

[0018] In summary, this invention can freely divide the battery storage space to accommodate lithium batteries of different sizes and quantities, improving the versatility, flexibility and production efficiency of battery module assembly, and solving the technical problems of poor versatility and high application cost caused by fixed structure in the prior art. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the partition storage structure of the present invention; Figure 2This is a schematic diagram of the partition in its unfolded state according to the present invention; Figure 3 This is a top view of the partition of the present invention in its unfolded state; Figure 4 This is a schematic diagram of the overall assembly structure of the battery pack core of the present invention; Figure 5 This is a schematic diagram of the overall exploded structure of the battery pack core of the present invention; Figure 6 This is a schematic diagram of the connection state between the partition and the substrate of the present invention; Figure 7 This is a side view of the locking assembly of the present invention; Figure 8 This is a partially enlarged structural diagram of the accommodating unit of the present invention; The invention reference information is as follows: 1. Base plate; 2. Vertical adjustment mechanism; 3. First partition; 4. Lateral adjustment mechanism; 5. Second partition; 6. Receiving unit; 7. Guide assembly; 8. Locking assembly; 9. Battery; 10. End cap assembly; 101. Slide groove; 102. Movable shaft; 103. Pulley; 104. Locking cap; 105. Connecting part; 106. Storage groove; 107. Cavity; 108. Positioning groove; 109. Positioning shaft; 110. Handle; 111. Curved surface.

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

[0022] The following will refer to the appendices in the embodiments of the present invention. Figure 1-8 The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0024] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0025] like Figure 1-8 The diagram illustrates a positioning device for a multi-layer stacked battery pack, comprising a substrate 1 serving as a support for batteries 9 and an adjustment base. The substrate 1 is generally a rectangular frame structure with a central cavity. Its four sides are defined as two transverse sides corresponding to the row direction of the battery arrangement and two longitudinal sides corresponding to the column direction of the battery arrangement. At least one set of longitudinal adjustment mechanisms 2 is provided on the inner side of at least one transverse side of the substrate 1. In this embodiment, only one transverse side of the substrate 1 has a set of longitudinal adjustment mechanisms 2. This longitudinal adjustment mechanism 2 is not a fixed structure but connects to and drives a first partition 3. Under the drive of the longitudinal adjustment mechanism 2, the first partition 3 can move smoothly and continuously along the longitudinal direction of the substrate 1 (i.e., perpendicular to the transverse side). Additionally, in this embodiment, two sets of transverse adjustment mechanisms 4 are provided on the inner side of one longitudinal side of the substrate 1. These transverse adjustment mechanisms 4 connect to and drive a second partition 5, enabling it to move along the transverse direction of the substrate 1 (i.e., perpendicular to the longitudinal side).

[0026] The first partition 3 and the second partition 5 are staggered, with the first partition 3 positioned between the upper and lower second partitions 5, ensuring that they do not interfere with each other during operation. Specifically, the first partition 3 is a complete plate whose length matches the transverse inner width of the base plate 1, allowing it to extend longitudinally from the transverse side equipped with a set of longitudinal adjustment mechanisms 2.

[0027] The two second partition plates 5 are identical in structure and are driven by two sets of lateral adjustment mechanisms 4, one above the other. The length of each second partition plate 5 matches the longitudinal inner width of the substrate 1, allowing it to extend laterally into the substrate 1 from the longitudinal side where the lateral adjustment mechanism 4 is located. Correspondingly, an upper sliding groove is provided at the height corresponding to the connection point of the upper second partition plate 5, and a lower sliding groove is provided at the height corresponding to the connection point of the lower second partition plate 5. A sliding groove 101 is also provided on the longitudinal side at the position corresponding to the connection points at both ends of the first partition plate 3. This sliding groove 101 is offset between the upper and lower sliding grooves, thus placing the installed first partition plate 3 between the upper and lower second partition plates 5, forming a non-interfering staggered design. Through independent longitudinal and lateral adjustments, the first partition plate 3 and the second partition plate 5 form a dynamic grid within the internal space of the substrate 1. They, while staggered and non-interfering with each other, together enclose one or more variable-sized accommodating units 6, each accommodating unit 6 precisely accommodating a single battery cell 9.

[0028] The above method allows for the free definition of the size and arrangement of the housing units by simply moving the first and second partitions arranged longitudinally and laterally. This enables the housing to be adapted to various cylindrical or square lithium batteries of different diameters, lengths, and widths, achieving multiple uses from a single plate.

[0029] like Figure 1-6 As shown: Both the longitudinal adjustment mechanism 2 and the transverse adjustment mechanism 4 include a guide assembly 7 and a locking assembly 8. The guide assembly 7 is responsible for ensuring the smooth and precise movement of the partition. The guide assembly includes a groove 101 provided on the inner wall of the base plate 1 and a movable shaft 102 provided at both ends of the first partition 3 and the second partition 5. The end of the movable shaft 102 is provided with a pulley 103 that slides in cooperation with the groove 101. By embedding the pulley 103 into the groove 101, the sliding friction between the partition and the base plate 1 is converted into rolling friction.

[0030] The first partition 3 is constrained within a receiving groove 106 on the transverse side of the substrate 1 by pulleys 103 at both ends. This receiving groove 106 is connected to a sliding groove on the longitudinal side. The movable shafts 102 at both ends of the first partition 3 can be fixed at corresponding positions on the sliding groove on the longitudinal side, allowing the first partition 3 to move longitudinally only along the sliding groove on the longitudinal side. Similarly, the second partition 5 is constrained within a receiving groove 106 on the longitudinal side of the substrate 1 by pulleys 103 at both ends. This receiving groove 106 is connected to a sliding groove on the transverse side, allowing the second partition 5 to move longitudinally only along the sliding groove on the longitudinal side. The sliding groove 101 acts as a linear guide, ensuring that all partitions remain parallel during movement, preventing deflection or jamming, and ultimately forming a neat and regular accommodating unit 6.

[0031] like Figure 6-7As shown, the locking assembly 8 is used to securely fix the first partition 3 and the second partition 5 in a preset position after they have been adjusted to their positions, so as to withstand various forces during battery assembly and use. Specifically, the locking assembly 8 includes a positioning shaft 109 disposed on the first partition 3 and the second partition 5, the positioning shaft 109 extending outwards. A locking cap 104, which can rotate along the shaft and move axially, is fitted onto the positioning shaft 109, the inner hole of the locking cap 104 having internal threads. On the outer wall of the base plate 1, corresponding to the position of the slide groove 101, a series of connecting portions 105 with external threads are spaced apart along the length direction.

[0032] In use, after dragging the first partition 3 or the second partition 5 to the target position, manually rotate the locking cap 104 until its internal thread engages with the external thread of the nearest connecting part 105 on the outer wall of the substrate 1. By tightening the locking cap 104, the end of the first partition 3 or the second partition 5 is firmly pressed against the inner wall of the substrate 1, and rigid locking is achieved through friction and the self-locking effect of the threads. This method provides extremely high connection rigidity and reliability, ensuring that the partition will not shift under vibration. At the same time, operation is more convenient, requiring no special tools, and facilitating quick on-site adjustment and maintenance.

[0033] like Figure 1-5 As shown: At least one side of the substrate 1 has a storage groove 106 on the inner side of its horizontal and vertical sides. The starting end of the sliding groove 101 is connected to the storage groove 106, and the cross-sectional dimensions of the storage groove 106 are sufficient to accommodate the fully retracted first partition 3 or second partition 5 and its pulley 103 and other components. In non-use states, such as storage, transportation, or when it is necessary to accommodate an oversized battery, the operator can loosen the locking assembly 8 and push the first partition 3 and the second partition 5 completely into the corresponding storage groove 106 along the sliding groove 101. At this time, all partitions are hidden within the frame of the substrate, and the center of the substrate 1 will present a complete and unobstructed cavity 107.

[0034] like Figure 6-7 As shown: In order to achieve fast and accurate positioning and avoid repeated measurements, such as Figure 5 As shown, a plurality of positioning grooves 108 can be provided on the lateral and longitudinal sides of the substrate 1. These positioning grooves 108 correspond to and communicate with the inner sliding grooves 101 in the vertical direction. The spacing of the positioning grooves 108 is carefully designed to match the industry-standard battery size.

[0035] When the first partition 3 is moved, its end movable shaft 102 or pulley 103 will move along with it. The operator does not need to measure; they simply move the movable shaft 102 or pulley 103 to the marked positioning groove 108 on the outside of the substrate 1, and it will engage in the positioning groove 108. Then, the locking cap 104 is tightened. The positioning groove 108 provides a locking point. This method enables rapid assembly of standard batteries and quantities, and greatly improves efficiency and consistency during batch assembly.

[0036] like Figure 6 As shown: One side of the first partition 3 and the second partition 5 extends to the outside of the substrate 1 and is provided with a driving component, typically a positioning shaft 109. The positioning shaft 109 is connected to the movable shaft 102. The function of the positioning shaft 109 is to extend to the outside of the substrate 1 for easy connection of a handle 110, so as to control the movement of the first partition 3 and the second partition 5 within the substrate 1. The positioning shaft 109 is a shaft component that is detachable from or integrally formed with the movable shaft 102. By providing a handle 110 for easy gripping, the first partition 3 or the second partition 5 can be easily moved within the substrate 1, overcoming the inconvenience of directly operating the partition body in a confined space. This makes the adjustment process more effortless and faster.

[0037] The present invention also provides a method for positioning multi-layer stacked battery packs using the above-mentioned positioning device, the method specifically including the following steps: S1. As Figure 1 The diagram shows a positioning device in a stowed state. At this time, the center of the substrate 1 is a complete cavity 107, and all the first partitions 3 and the second partitions 5 are stowed in their respective storage slots 106, and the device is in an initial compact state; S2. For example Figure 2 The number of rows and columns of the storage units 6 is determined based on the size and specifications of the battery 9 to be installed. For example, if 18650 batteries are used to form a 3-parallel 4-series module, then 3 rows and 4 columns, a total of 12 storage units, are required. S3. Drive the longitudinal adjustment mechanism 2 to move the first partition 3 longitudinally to the corresponding position and lock it; drive the transverse adjustment mechanism 4 to move the second partition 5 transversely to the corresponding position and lock it, thereby forming multiple housing units 6 that match the size of the lithium battery 9. First, determine the target position of each partition according to the calculation in step S2. Then, pull the handle 110 to pull the first partition 3 out of the storage slot 106 and slide it longitudinally along the slide groove 101. When the indicator mechanism on the first partition 3 (such as the positioning point set on its outer side) aligns with the positioning groove 108 of the corresponding row on the outer side of the substrate, it is engaged. Subsequently, rotate the locking cap 104 to tighten it with the threaded connection part 105 on the outer side of the substrate, completing the positioning and locking of the first partition 3. Using the same principle and process, the difference is that the direction of movement is transverse and the plate of the second partition 5 slides over the upper and lower sides of the first partition 3 to position and lock all the second partitions 5. Finally, all the separators are locked in place, forming a regular battery matrix space within the substrate 1; S4. For example Figure 5 As shown, multiple batteries 9 are placed into the pre-formed receiving unit 6. Since the size of the receiving unit 6 is precisely adjusted according to the batteries 9, each battery can be tightly and securely positioned to prevent rolling or displacement during subsequent processing; S5. For example Figure 4 As shown, end cap assemblies 10 are installed at the top and bottom of the positioning device where batteries 9 have been placed, and a heat dissipation protection plate assembly is installed on the side. All batteries 9 are connected in series and parallel according to design requirements, and their positive and negative electrodes are connected to the management circuit on the heat dissipation protection plate assembly, ultimately forming a complete battery pack core assembly. Thus, this positioning device and method achieves efficient, neat, and reliable positioning of multiple battery cells, laying a solid foundation for building a safe and stable battery pack. In step S3, the first partition 3 and the second partition 5 can be precisely positioned according to the preset positioning groove 108, thereby quickly adapting to batteries 9 of common sizes such as 18650 and 21700.

[0038] The method described in this invention, based on the aforementioned flexibly adjustable positioning device, is naturally suitable for the modular packaging of cylindrical or prismatic lithium batteries of different capacity specifications, such as... Figure 8 As shown, when using a cylindrical battery 9, the sides of the first separator 3 and the second separator 5 can adopt arc-shaped surfaces 111 that fit more closely to the circumferential wall, so as to more firmly position the battery 9.

[0039] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A positioning device for a multi-layer stacked battery pack, comprising a substrate (1), characterized in that: The substrate (1) has at least one set of longitudinal adjustment mechanisms (2) on its lateral side. The longitudinal adjustment mechanism (2) is connected to a first partition (3) that can move longitudinally along the substrate (1). The substrate (1) has at least one set of lateral adjustment mechanisms (4) on its longitudinal side. The lateral adjustment mechanism (4) is connected to a second partition (5) that can move laterally along the substrate (1). The first partition (3) and the second partition (5) are arranged alternately in the internal space of the substrate (1) to jointly enclose a housing unit (6) for placing the battery (9).

2. The positioning device for a multi-layer stacked battery pack according to claim 1, characterized in that: Both the longitudinal adjustment mechanism (2) and the transverse adjustment mechanism (4) include a guide assembly (7) and a locking assembly (8). The first partition (3) and the second partition (5) are slidably connected to the base plate (1) through the guide assembly (7). The locking assembly (8) is used to lock the first partition (3) and the second partition (5) in a preset position.

3. The positioning device for a multi-layer stacked battery pack according to claim 2, characterized in that: The guide assembly includes a groove (101) disposed on the inner wall of the substrate (1) and a movable shaft (102) disposed at both ends of the first partition (3) and the second partition (5). The end of the movable shaft (102) is provided with a pulley (103) that slides in cooperation with the groove (101).

4. The positioning device for a multi-layer stacked battery pack according to claim 2, characterized in that: The locking assembly (8) includes a positioning shaft (109) disposed on the first partition (3) and the second partition (5). A movable locking cap (104) is sleeved on the positioning shaft (109). The outer side of the base plate (1) is provided with a plurality of connecting parts (105) that match the locking cap (104). The locking cap (104) and the connecting parts (105) are connected by threads to lock the first partition (3) and the second partition (5).

5. The positioning device for a multi-layer stacked battery pack according to claim 3, characterized in that: The substrate (1) has a storage groove (106) on the inner side of at least one side of the horizontal side and the vertical side. The starting end of the slide (101) is connected to the storage groove (106). In the non-use state, the first partition (3) and the second partition (5) can be completely stored in the storage groove (106) so that a complete cavity (107) is formed in the center of the substrate (1).

6. The positioning device for a multi-layer stacked battery pack according to claim 5, characterized in that: The substrate (1) has several positioning grooves (108) on its lateral and longitudinal sides that correspond to the size of a general battery. The positioning grooves (108) are connected to the slide grooves (101).

7. The positioning device for a multi-layer stacked battery pack according to claim 1, characterized in that: The positioning shaft (109) is provided with a handle (110), and by operating the handle (110), the first partition (3) and the second partition (5) can be moved within the substrate (1).

8. A method for positioning a multi-layer stacked battery pack using the positioning device described in any one of claims 1-7, characterized in that, Includes the following steps: S1. A positioning device in a stored state is provided, wherein the center of the substrate (1) is a cavity (107). S2. Based on the size specifications of the battery (9) to be installed, determine the number of rows and columns required to divide the accommodating unit (6); S3. Drive the longitudinal adjustment mechanism (2) to move the first partition (3) longitudinally to the corresponding position and lock it, drive the lateral adjustment mechanism (4) to move the second partition (5) laterally to the corresponding position and lock it, so that it forms multiple accommodating units (6) that match the size of the lithium battery (9). S4. Place the multiple batteries (9) into the accommodating unit (6) accordingly; S5. Install end cap assemblies (10) at the top and bottom of the positioning device where the battery (9) has been placed, install heat dissipation protection plate assemblies on the side, connect all the batteries (9) to each other, connect their positive and negative electrodes to the heat dissipation protection plate assemblies, and form the battery pack core assembly to complete the positioning of the battery (9).

9. The positioning device for a multi-layer stacked battery pack according to claim 8, characterized in that: When step S3 is executed, the first partition (3) and the second partition (5) are precisely positioned according to the preset positioning groove (108) to fit the battery (9) of a universal size.

10. A positioning device for a multi-layer stacked battery pack according to claim 8, characterized in that: The method is applicable to cylindrical or prismatic lithium batteries of different capacity specifications.

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