Battery pack
By installing adjustable plates with adjustable thickness between the battery cells, the problems of clamping and box cracking caused by cell expansion are solved, thus achieving both battery pack safety and ease of operation.
Patent Information
- Application Number
- CN202423288950.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In CTP battery packs, the compact arrangement of the cells makes it difficult for the grippers to retract, and the expansion of the cells can easily cause the casing to crack or break, posing a risk of loss of control.
An adjustable plate with adjustable thickness is installed between the battery cells. Through a sliding ramp and a limit snap-fit structure, the thickness can be automatically adjusted after the battery cell expands, avoiding the pushing force on the end plate and simplifying the battery cell loading operation.
It effectively prevents battery pack deformation, simplifies the cell loading process, reduces the thrust of cell expansion on the end plate, and improves the safety and ease of operation of the battery pack.
Smart Images
Figure CN223693276U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery pack design technical field especially relates to a kind of battery pack, to simplify the way of cell into box, and adapt to the expansion of cell. BACKGROUND
[0002] CTP, that is, Cell To PACK (battery-battery pack), that is, directly integrate cell into battery pack shell, so that the intermediate module architecture is saved, to simplify the structure of battery pack, improve battery pack capacity.
[0003] However, due to the very compact setting of the cells in CTP, when the stacked cells are placed into the box of CTP by the clamping jaw, the clamping jaw is easily caught by the outermost cell and the box of CTP, making it difficult to retract.
[0004] Moreover, since the cells in CTP are usually in close proximity to each other, when CTP is improperly stored, not used for a long time, internally short-circuited, internally damaged, overheated, etc., the cells in CTP may all expand, and when multiple cells expand, the entire CTP box is at risk of being squeezed and broken, causing the entire CTP to lose control. SUMMARY
[0005] The utility model provides a kind of battery pack, by being provided with the adjusting plate of adjustable thickness between adjacent cell, when cell expands, technician can appropriately reduce the thickness of adjusting plate, to prevent cell expansion from extruding end plate and causing end plate deformation, avoid battery pack damage, to solve at least one of the above technical problems.
[0006] The technical solution to solve the above problems is to provide a battery pack, the battery pack includes a base, an end plate, an adjusting plate, and a plurality of cells, the plurality of cells are stacked on the base along the length direction of the base, and two end plates are respectively arranged at both ends of the base along the length direction of the base; the adjusting plate is arranged between the cells, the adjusting plate includes a first plate body and a second plate body, the plate body surfaces of the first plate body and the second plate body in contact with each other are sliding guide inclined surfaces, and the first plate body and the second plate body can slide relative to the sliding guide inclined surfaces.
[0007] Further, along the length direction of the base, the adjusting plate is arranged in the middle of the base.
[0008] Further, along the width direction of the base, the base is further provided with a limiting plate on both sides, and the limiting plates on both sides cooperate to simultaneously fix the plurality of cells.
[0009] Further, along the length direction of the base, a limiting clamping structure is arranged between the limiting plate and the adjusting plate, the limiting clamping structure comprises a clamping protrusion arranged on the inner side of the limiting plate and a clamping groove arranged on the side of the second plate body and used for clamping the clamping protrusion.
[0010] Further, the clamping protrusion is arranged as a strip-shaped protrusion extending along the length direction of the base, and the length of the clamping protrusion is greater than the maximum thickness of the adjusting plate; the clamping groove extends along the length direction of the base and penetrates through the two sides of the second plate body; and the adjusting plate body is arranged between any two battery cells in a slidable manner along the length direction of the base through the limiting clamping structure.
[0011] Further, the plate surface of the first plate body and the second plate body in contact with each other is a sliding guide inclined surface, and the included angle between the sliding guide inclined surface and the base is greater than 45°.
[0012] Further, a sliding guide structure is arranged between the first plate body and the second plate body, the sliding guide structure comprises a guide sliding rail arranged on the first plate body and a guide sliding groove arranged on the second plate body.
[0013] Further, the adjusting plate is further provided with an adjusting assembly for controlling the thickness of the adjusting plate by controlling the relative sliding distance of the first plate body and the second plate body.
[0014] Further, the adjusting assembly comprises a first insertion hole provided on the first plate body, a second insertion hole provided on the second plate body, an insertion limiting bolt, and a threaded hole provided on the base, the diameters of the first insertion hole and the second insertion hole are greater than the diameter of the insertion limiting bolt, the insertion limiting bolt vertically passes through the first insertion hole and the second insertion hole in sequence and is threadedly fixedly connected with the base, and the upper end of the insertion limiting bolt is further provided with a limiting nut with a diameter greater than the hole diameter of the first insertion hole.
[0015] Further, the maximum height of the adjusting plate is less than or equal to the height of the battery cell.
[0016] The beneficial effects of the utility model are as follows:
[0017] 1. When the battery cell is detected to expand, the first plate body can be slid upward along the sliding contact surface, so that the thickness of the whole adjusting plate is reduced, the pressure generated when the battery cell expands is released, the pushing force of the expanded battery cell on the end plate is reduced, and the deformation of the battery pack is avoided.
[0018] 2. When installing the battery cells onto the base, the following steps can also be taken: install the second plate - install a portion of battery cells on each side of the second plate - install the first plate - push the first plate downward along the sliding contact surface, so that the adjusting plate can simultaneously press and limit the battery cells on both sides, thereby cooperating with the two end plates to fix several battery cells; this operation method does not require the use of auxiliary tools such as clamps for box insertion, and the operation is relatively simple.
[0019] 3. When cell expansion is detected, simply loosen the plug-in limit bolts appropriately, and the first and second plates will automatically slide relative to each other under the expansion of the cell, so as to automatically adapt to the expanded volume of the cell. The operation is simple and quick. Attached Figure Description
[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to denote similar elements. The drawings described below are some embodiments of the present invention, but not all embodiments. Other drawings will be readily available to those skilled in the art based on these drawings without any inventive effort.
[0021] Figure 1 This is an overall structural diagram of the battery pack in this embodiment;
[0022] Figure 2 This is an exploded view of the adjustment plate in this embodiment;
[0023] Figure 3 This is a structural diagram of the first plate in this embodiment;
[0024] Figure 4 This is a structural diagram of the second plate in this embodiment;
[0025] Figure 5 This is a structural diagram of the base in this embodiment;
[0026] 1-Base, 2-End plate, 3-Adjusting plate, 31-First plate, 32-Second plate, 33-Snap-fit groove, 34-Sliding guide slope, 35-Guide rail, 36-Guide groove, 4-Battery cell, 5-Limiting plate, 51-Snap-fit protrusion, 61-First insertion hole, 62-Second insertion hole, 63-Insertion limit bolt. Detailed Implementation
[0027] The orientation terms mentioned or possibly mentioned in the present specification, such as up, down, left, right, front, back, front side, back side, top, bottom, etc., are defined with respect to the structure shown in the drawings, and the words "inner" and "outer" refer to the direction towards or away from the geometric center of a particular component, which are relative concepts, so they can change accordingly according to different positions, different use states. Therefore, these or other orientation terms should not be interpreted as restrictive terms.
[0028] Please refer to Figures 1 to 5 , refer to Figure 1 , a battery pack of a specific embodiment of the utility model, mainly includes base 1, end plate 2, adjusting plate 3, a plurality of battery cells;Among them, the base 1 is rectangular plate body, the two long side of base 1 is provided with limit plate 5, a plurality of battery cells is stacked along the length direction of base 1 and is arranged on base 1, two limit plates 5 are correspondingly arranged on the width direction of base 1 and limit a plurality of battery cells at the same time;In addition, the two short sides of base 1 are fixedly provided with an end plate 2 respectively, two end plates 2 are arranged opposite, and two end plates 2 are correspondingly arranged on the length direction of base 1 and are clamped and limited to a plurality of stacked battery cells.
[0029] More special is: along the length direction of base 1, the middle part of base 1 is also vertically provided with the thickness-adjustable adjusting plate 3, the adjusting plate 3 is vertically inserted between the two battery cells close to the middle part of the base 1, so that when the battery cell expands, the technician can adjust the thickness of the adjusting plate 3 to adapt to the volume of the expanded battery cell, so as to avoid the deformation of the end plate 2 pushed by the expanded battery cell.
[0030] In the embodiment, please refer to Figure 1 and Figure 2 , refer to Figure 1 , the adjusting plate 3 includes the first plate body 31 and the second plate body 32 which are relatively slidably arranged, and the plate body surface of the first plate body 31 and the second plate body 32 which contact each other is the sliding guide slope 34 with an angle greater than 45° between the base 1, the sliding guide slope 34 on the first plate body 31 extends from the lower end surface of the first plate body 31 to the left side wall direction of the first plate body 31, the sliding guide slope 34 on the second plate body 32 extends from the upper end surface of the second plate body 32 to the right side wall direction of the second plate body 32, the first plate body 31 and the second plate body 32 are relatively slid through the sliding guide slope 34, and then the overall thickness of the adjusting plate 3 is adjusted to adapt to the expansion deformation of the battery cell.
[0031] In the embodiment, refer to Figure 1In the shown orientation, when the plurality of battery cells are normally stacked and loaded between the two end plates 2, the technician can also first clamp the second plate body 32 to the middle of the base 1, then stack the plurality of battery cells into two parts and place them into the two sides of the second plate body 32, and finally slide the first plate body 31 into the second plate body 32 and the right side battery cells, and press the first plate body 31 downward, so that the first plate body 31 can tightly position the plurality of battery cells on the right side to the right end plate 2, and the second plate body 32 can tightly position the plurality of battery cells on the left side to the left end plate 2, thereby achieving normal installation operation of the battery cells into the box, and limiting and fixing the plurality of battery cells without using auxiliary installation tools such as clamping jaws.
[0032] It should be noted that in other embodiments, the adjusting plate 3 is not necessarily arranged in the middle of the base 1, and can be arranged at a position one quarter of the length of the base 1 away from the left end of the base 1, or other positions on the base 1. Figure 1 It should be noted that in other embodiments, the adjusting plate 3 is not necessarily arranged in the middle of the base 1, and can be arranged at a position one quarter of the length of the base 1 away from the left end of the base 1, or other positions on the base 1.
[0033] In some embodiments, referring to Figure 5 In order to prevent the adjusting plate 3 from being pulled out from the middle of the battery cells to the two long side directions of the base 1, a limiting clamping structure is arranged between the limiting plate 5 and the adjusting plate 3; the limiting clamping structure includes a clamping protrusion 51 arranged on the inner side of the limiting plate 5, and a clamping groove 33 arranged on the side of the second plate body 32 and used for clamping the clamping protrusion 51; and the clamping protrusion 51 is arranged as a strip-shaped protrusion extending along the length direction of the base 1, the length of the clamping protrusion 51 is greater than the maximum thickness of the adjusting plate 3, and the clamping groove 33 is arranged extending along the length direction of the base 1 and penetrating through the two sides of the second plate body 32, and the adjusting plate 3 is arranged between any two battery cells along the length direction of the base 1 through the limiting clamping structure.
[0034] In this way, referring to Figure 1 When the technician slides and clamps the second plate body 32 on the base 1, the second plate body 32 can be kept in close contact with the battery cells on its left side through appropriate sliding for different size specifications of the battery cells; and in the process of placing the battery cells to the left side of the second plate body 32, the technician can slide the second plate body 32 to the right to facilitate the placement of the battery cells; in addition, when the first plate body 31 is pressed downward, the first plate body 31 and the second plate body 32 can slide to tightly position the battery cells on the right side and the battery cells on the left side, respectively, so that the adjusting plate 3 can simultaneously exert a limiting effect on the battery cells on its left and right sides.
[0035] In some embodiments, referring to Figures 2 to 4To facilitate the downward pressing of the first plate body 31 and prevent the first plate body 31 and the second plate body 32 from relatively sliding to the two sides of the base 1, affecting the adjusting effect of the end plate 2 by the adjusting plate 3, a sliding guide structure is further arranged between the first plate body 31 and the second plate body 32, which includes a guide sliding rail 35 arranged on the first plate body 31 and a guide sliding groove 36 arranged on the second plate body 32. The guide sliding rail 35 is provided with two and protrudes on the sliding guide slope 34 of the first plate body 31, and the guide sliding groove 36 is provided with two and vertically recessed on the sliding guide slope 34 of the second plate body 32. The two guide sliding rails 35 and the two guide sliding grooves 36 correspond to each other to guide the first plate body 31 and the second plate body 32 to only relatively slide along the upward and downward inclination.
[0036] In some embodiments, in order to further facilitate the control of the thickness of the adjusting plate 3, an adjusting assembly for controlling the thickness of the adjusting plate 3 by controlling the relative sliding distance of the first plate body 31 and the second plate body 32 is further arranged on the adjusting plate 3; the adjusting assembly includes a first insertion hole 61 opened through the first plate body 31, a second insertion hole 62 opened on the second plate body 32, an insertion limiting bolt 63, and a threaded hole arranged on the base 1. The diameters of the first insertion hole 61 and the second insertion hole are greater than the diameter of the insertion limiting bolt 63. The insertion limiting bolt 63 vertically passes through the first insertion hole 61 and the second insertion hole 62 in turn to be threadedly fixedly connected with the base 1. The upper end of the insertion limiting bolt 63 is further provided with a limiting nut with a diameter greater than the hole diameter of the first insertion hole 61.
[0037] Specifically, in the present embodiment, please refer to Figure 2 and refer to Figure 2In the shown orientation, two first insertion holes 61, two second insertion holes 62, two insertion limiting bolts 63, and two threaded holes are provided, each of the two insertion limiting bolts 63 is vertically inserted into one of the first insertion holes 61 and then is further inserted into one of the second insertion holes 62, and then is screwed with one of the threaded holes on the base 1, after that, each of the two limiting nuts on the upper end of the two insertion limiting bolts 63 cooperates with the base 1 to jointly clamp and limit the first plate body 31 and the second plate body 32 from relative sliding, so as to lock the current thickness value of the adjusting plate 3, so that the adjusting plate 3 can cooperate with the end plate 2 to further fix and limit a plurality of battery cells; when the battery cells swell, the technician can rotate the two insertion limiting bolts 63 through the two limiting nuts exposed on the upper end of the first plate body 31, so that the two limiting nuts move upward, because the diameter of the first insertion hole 61 is larger than the diameter of the insertion limiting bolt 63, and the diameter of the second insertion hole 62 is also larger than the diameter of the insertion limiting bolt 63, therefore, the swollen battery cell on the right side of the first plate body 31 can push the first plate body 31 to slide leftward and upward along the sliding guide slope 34, and the battery cell on the left side of the second plate body 32 can also push the second plate body 32 to slide rightward, so that the adjusting plate 3 is self-adaptively thinned to release the pushing force of the battery cells on both sides of the adjusting plate 3 due to swelling and the end plate 2, thereby protecting the end plate 2 and preventing the battery pack from deforming.
[0038] In some embodiments, although not shown in the figure, it can be understood that: with reference to Figure 1 Figure 1 In the shown orientation, there are also interval foams between the first plate body 31 and the battery cell on its right side, between the second plate body 32 and the battery cell on its left side, between adjacent battery cells, and even between the battery cell and the end plate 2, so that when the battery cell swells, the swollen battery cell can also extrude the interval foam to reduce the force acting directly on the end plate 2, thereby reducing the stress on the end plate 2.
[0039] In some embodiments, the maximum height of the adjusting plate 3 is less than or equal to the height of the battery cell, so as to prevent the height of the adjusting plate 3 from increasing synchronously while its thickness decreases, and then pushing upward to the top wall of the box of the battery pack.
[0040] It should be noted that in actual application, the thickness expansion range of the plurality of battery cells in a single battery pack is not large, therefore, the thickness adjustable range of the adjusting plate 3 of the present embodiment does not need to be set too large, and the thickness adjustable range of the adjusting plate 3 is set to 0-5mm.
[0041] The above-mentioned matters not mentioned are applicable to the prior art.
[0042] It should be finally pointed out that: the above examples are only used to illustrate the technical solutions of the utility model, and not limit it. Although the utility model has been explained in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.
Claims
1. A battery pack, characterized by, The battery pack comprises a base (1), an end plate (2), an adjusting plate (3), a plurality of battery cells, the plurality of battery cells are arranged on the base (1) in the length direction of the base (1) and are stacked, and two end plates (2) are arranged at both ends of the base (1) in the length direction of the base (1).
2. The battery pack of claim 1, wherein, The adjusting plate (3) is arranged in the middle of the base (1) in the length direction of the base (1).
3. The battery pack of claim 1, wherein, In the width direction of the base (1), the base (1) is further provided with a limiting plate (5) on both sides, and the limiting plates (5) on both sides are matched to fix the plurality of battery cells at the same time.
4. The battery pack of claim 3, wherein, In the length direction of the base (1), a limiting clamping structure is further arranged between the limiting plate (5) and the adjusting plate (3), the limiting clamping structure comprises a clamping protrusion (51) arranged on the inner side of the limiting plate (5) and a clamping groove (33) arranged on the side of the second plate body (32) and used for clamping the clamping protrusion (51).
5. The battery pack of claim 4, wherein, The clamping protrusion (51) is arranged as a strip-shaped protrusion extending in the length direction of the base (1), and the length of the clamping protrusion (51) is greater than the maximum thickness of the adjusting plate (3), the clamping groove (33) is arranged extending in the length direction of the base (1) and penetrates through both sides of the second plate body (32), and the adjusting plate (3) is arranged between any two battery cells in the length direction of the base (1) through the limiting clamping structure.
6. The battery pack of claim 1, wherein, The sliding guide slope (34) is arranged at an angle greater than 45° with the base (1).
7. The battery pack of claim 1, wherein, The first plate body (31) and the second plate body (32) are further provided with a sliding guide structure, the sliding guide structure comprises a guide sliding rail (35) arranged on the first plate body (31) and a guide sliding groove (36) arranged on the second plate body (32).
8. The battery pack of claim 1, wherein, The adjusting plate (3) is further provided with an adjusting assembly for controlling the thickness of the adjusting plate (3) by controlling the relative sliding distance of the first plate body (31) and the second plate body (32).
9. The battery pack of claim 8, wherein, The adjusting assembly comprises a first insertion hole (61) formed through the first plate body (31), a second insertion hole (62) formed on the second plate body (32), an insertion limiting bolt (63), and a threaded hole provided on the base (1), the diameters of the first insertion hole (61) and the second insertion hole are greater than the diameter of the insertion limiting bolt (63), the insertion limiting bolt (63) vertically passes through the first insertion hole (61) and the second insertion hole (62) in sequence and is threadedly fixedly connected with the base (1), and the upper end of the insertion limiting bolt (63) is further provided with a limiting nut having a diameter greater than the diameter of the first insertion hole (61).
10. The battery pack of claim 1, wherein, The maximum height of the adjusting plate (3) is less than or equal to the height of the battery cell.