Battery cell fastening device

Abstract

The utility model relates to the technical field of batteries, and discloses a battery cell fastening device which comprises a first end plate and a second end plate, the second end plate and the first end plate are arranged at an interval and a mounting gap for mounting a battery cell is formed between the second end plate and the first end plate; the fastening device comprises a first fastening part and a second fastening part, the first fastening part and the second fastening part are connected and arranged on the outer wall of the first end plate and the outer wall of the second end plate in a sleeving mode, one of the first fastening part and the first end plate is provided with a first positioning protrusion, and the other one of the first fastening part and the first end plate is provided with a first positioning groove suitable for being matched with the first positioning protrusion. One of the second fastening part and the second end plate is provided with a second positioning bulge, and the other one of the second fastening part and the second end plate is provided with a second positioning groove matched with the second positioning bulge. The battery cell fastening device disclosed by the utility model can solve or improve the problem that the service life of a battery module is shortened due to the fact that a fastening belt cannot clamp a battery cell.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cell fastening device. Background Art

[0002] A battery module usually includes end plates, fastening bands and multiple battery cells. The battery cell is the smallest unit of the battery module and also the electrical energy storage unit. Multiple battery cells are arranged in sequence according to a preset direction, and end plates are set on the outside of the two outermost battery cells. The fastening bands are tied to the outside of the two end plates to clamp the battery cells to form a battery module.

[0003] In the related art, the fastening belt is a ring-shaped structure. In order to facilitate the bundling of the fastening belt to the outside of the end plate, the size of the fastening belt is slightly larger, but this will cause a certain gap between the fastening belt and the end plate, resulting in insufficient clamping force on the battery cell. After a period of time, the relative position between the fastening belt and the end plate will change. When the battery cell expands, the fastening belt will easily fall off the end plate, making it impossible to limit the expansion of the battery cell, thereby reducing the life of the battery module. Utility Model Content

[0004] In view of this, the present application provides a battery cell fastening device to solve or improve the problem that the fastening belt cannot clamp the battery cell, thereby reducing the service life of the battery module.

[0005] The present application provides a battery cell fastening device, comprising:

[0006] a first end plate;

[0007] a second end plate, spaced apart from the first end plate and forming an installation gap therebetween for installing the battery cell;

[0008] The fastening device includes a first fastening portion and a second fastening portion, wherein the first fastening portion and the second fastening portion are connected to and sleeved on the first end plate and the second end plate;

[0009] Among them, one of the first fastening part and the first end plate is provided with a first positioning protrusion, and the other is provided with a first positioning groove suitable for cooperating with the first positioning protrusion; one of the second fastening part and the second end plate is provided with a second positioning protrusion, and the other is provided with a second positioning groove suitable for cooperating with the second positioning protrusion.

[0010] Beneficial effects: Multiple battery cells are installed in sequence in the installation gap, the first fastening part and the second fastening part are sleeved on the outer walls of the first end plate and the second end plate, the first end plate and the second end plate are clamped, and the first positioning protrusion and the second positioning protrusion are correspondingly inserted into the first positioning groove and the second positioning groove, which can prevent the first fastening part and the second fastening part from detaching from the first end plate and the second end plate, thereby improving the stability of the clamping of the battery cell, preventing the battery cell from expanding, and improving the life of the battery module.

[0011] In an optional embodiment, the fastening device also includes an adjustment component, the first fastening part is a first fastening belt, the second fastening part is a second fastening belt, the first fastening belt is provided with a first positioning protrusion, the second fastening belt is provided with a second positioning protrusion, and the first fastening belt and the second fastening belt are connected by the adjustment component and are fixed on the first end plate and the second end plate.

[0012] In an optional embodiment, the adjustment assembly includes a first adjustment member and a second adjustment member, the two ends of the first adjustment member are respectively connected to the first end of the first fastening band and the first end of the second fastening band, and the two ends of the second adjustment member are respectively connected to the second end of the first fastening band and the second end of the second fastening band.

[0013] In an optional embodiment, the first fastening belt is provided with a first adjustment section, a positioning section, and a second adjustment section along its length direction, the first adjustment section is provided with a plurality of first adjustment holes along its length direction, and the second adjustment section is provided with a plurality of second adjustment holes along its length direction;

[0014] The first adjusting member is provided with a first connecting end and a first adjusting end, and the second adjusting member is provided with a second connecting end and a second adjusting end. The first adjusting end can be snapped into the first adjusting hole, and the first connecting end is connected to the first end of the second fastening belt. The second adjusting end can be snapped into the second adjusting hole, and the second connecting end is connected to the second end of the second fastening belt.

[0015] In an optional embodiment, the first adjusting member includes an outer shell, an elastic member and a snap-fitting protrusion. The openings at both ends of the outer shell form a first channel for the first adjusting section to pass through. A receiving groove is provided on the inner side wall of the outer shell. One end of the elastic member is connected to the bottom of the receiving groove, and the other end is connected to the snap-fitting protrusion. The snap-fitting protrusion is telescopically connected to the receiving groove and is suitable for telescopic switching between a snap-fitting position and a release position. In the snap-fitting position, the snap-fitting protrusion extends out of the receiving groove through the first adjustment hole and abuts against the inner side wall of the outer shell opposite to it. In the release position, the snap-fitting protrusion shrinks into the receiving groove so that the first adjusting section is slidably connected to the first channel. Under the action of the elastic member, the snap-fitting protrusion has a tendency to extend in the direction from the release position to the snap-fitting position.

[0016] In an optional embodiment, the snap-fit protrusion is provided with a sliding portion and a snap-fit portion, the sliding portion is telescopically connected in the accommodating groove, and the snap-fit portion is provided with a first inclined surface. When in the snap-fit position, the snap-fit portion passes through the first adjustment hole and abuts against the inner side wall of the shell opposite thereto. When in the release position, the snap-fit portion is located in the accommodating groove so that the first adjustment section is slidably connected to the first channel.

[0017] In an optional embodiment, the second adjusting member includes a shell, an elastic member and a plug-in protrusion. The openings at both ends of the shell form a second channel for the second adjusting section to pass through. A slide groove is provided on the inner side wall of the shell. One end of the elastic member is connected to the bottom of the slide groove, and the other end is connected to the plug-in protrusion. The plug-in protrusion and the slide groove are telescopically connected and are suitable for telescopic switching between the plug-in position and the release position. In the plug-in position, the plug-in protrusion extends out of the slide groove through the second adjustment hole and abuts against the inner side wall of the shell opposite to it. In the release position, the plug-in protrusion shrinks into the slide groove so that the second adjustment section is slidably connected to the second channel. Under the action of the elastic member, the plug-in protrusion has a tendency to extend in the direction from the release position to the plug-in position.

[0018] In an optional embodiment, the plug-in protrusion is provided with a sliding end and a plug-in end, the sliding end is telescopically connected in the slide groove, and the plug-in end is provided with a second inclined surface. When in the plug-in position, the plug-in end passes through the second adjustment hole and abuts against the inner side wall of the shell opposite to it. When in the released position, the plug-in end is located in the slide groove so that the second adjustment section is slidably connected to the second channel.

[0019] In an optional embodiment, there are multiple first positioning grooves, and the multiple first positioning grooves are arranged in parallel; there are multiple second positioning grooves, and the multiple positioning grooves are arranged in parallel.

[0020] In an optional embodiment, the opening directions of the plurality of first positioning grooves and the plurality of second positioning grooves are all inclined downward. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 This is a schematic structural diagram of a battery cell fastening device according to an embodiment of the present application;

[0023] Figure 2 for Figure 1 A partial enlarged schematic diagram;

[0024] Figure 3 This is a structural schematic diagram of a first end plate in a battery cell fastening device according to an embodiment of the present application;

[0025] Figure 4 for Figure 3 A partial enlarged schematic diagram of B in the middle;

[0026] Figure 5This is a structural schematic diagram of another battery cell fastening device according to an embodiment of the present application;

[0027] Figure 6 This is a cross-sectional view of a first adjusting member in a battery cell fastening device according to an embodiment of the present application.

[0028] Description of reference numerals:

[0029] 1. First end plate; 11. First positioning groove; 2. Second end plate; 3. Installation gap; 4. Fastening device; 41. First fastening belt; 411. First positioning protrusion; 412. First adjustment section; 413. Positioning section; 414. Second adjustment section; 415. First adjustment hole; 416. Second adjustment hole; 42. Second fastening belt; 43. Adjustment assembly; 431. First adjustment member; 4311. Housing; 43111. First channel; 43112. Accommodating groove; 4312. Elastic member; 4313. Snap-fit protrusion; 43131. Sliding portion; 43132. Snap-fit portion; 432. Second adjustment member; 5. Perforation DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0031] The following combination Figures 1 to 6 , describing the embodiments of the present application.

[0032] According to an embodiment of the present application, a battery cell fastening device is provided, comprising:

[0033] First end plate 1;

[0034] The second end plate 2 is spaced apart from the first end plate 1 and forms an installation gap 3 for installing the battery cell;

[0035] The fastening device 4 includes a first fastening portion and a second fastening portion, wherein the first fastening portion and the second fastening portion are connected and sleeved on the first end plate 1 and the second end plate 2;

[0036] Among them, one of the first fastening part and the first end plate 1 is provided with a first positioning protrusion 411, and the other is provided with a first positioning groove 11 suitable for cooperating with the first positioning protrusion 411; one of the second fastening part and the second end plate 2 is provided with a second positioning protrusion, and the other is provided with a second positioning groove suitable for cooperating with the second positioning protrusion.

[0037] Multiple battery cells are installed in sequence in the installation gap 3, and the first fastening part and the second fastening part are sleeved on the first end plate 1 and the second end plate 2 to clamp the first end plate 1 and the second end plate 2. The first positioning protrusion 411 and the second positioning protrusion are correspondingly inserted into the first positioning groove 11 and the second positioning groove, which can prevent the first fastening part and the second fastening part from being separated from the first end plate 1 and the second end plate 2, thereby improving the stability of the clamping of the battery cell, preventing the battery cell from expanding, and increasing the life of the battery module.

[0038] In one embodiment, Figures 1 to 4 As shown, the fastening device 4 also includes an adjustment component 43. The first fastening part is a first fastening belt 41, and the second fastening part is a second fastening belt 42. The first fastening belt 41 is provided with a first positioning protrusion 411, and the second fastening belt 42 is provided with a second positioning protrusion. The first fastening belt 41 and the second fastening belt 42 are connected and sleeved on the first end plate 1 and the second end plate 2 through the adjustment component 43. The first fastening belt 41 corresponds to the first end plate 1, and the first positioning protrusion 411 is inserted into the first positioning groove 11. The second fixing belt corresponds to the second end plate 2, and the second protrusion is inserted into the second positioning groove. The two ends of the first fastening belt 41 are connected to the two ends of the second fastening belt 42 through the adjustment component 43 to form a closed annular fastening belt. The adjustment component 43 can adjust the size of the annular fastening belt and can clamp the first end plate 1 and the second end plate 2.

[0039] In one embodiment, Figures 1 to 4 As shown, the adjustment component 43 includes a first adjustment member 431 and a second adjustment member 432, and the two ends of the first adjustment member 431 are respectively connected to the first end of the first fastening belt 41 and the first end of the second fastening belt 42, and the two ends of the second adjustment member 432 are respectively connected to the second end of the first fastening belt 41 and the second end of the second fastening belt 42. The first fastening band 41 corresponds to the first end plate 1, and the first positioning protrusion 411 is inserted into the first positioning groove 11. The second fixing band corresponds to the second end plate 2, and the second protrusion is inserted into the second positioning groove. After the first fastening band 41 and the second fastening band 42 are positioned, the first adjusting member 431 connects the first end of the first fastening band 41 with the first end of the second fastening band 42, and the second adjusting member 432 connects the second end of the first fastening band 41 with the second end of the second fastening band 42, and adjusts them to a suitable length. The length of the annular fastening band is adjusted by the first adjusting member 431 and the second adjusting member 432 so that it clamps the first end plate 1 and the second end plate 2. The length of the annular fastening band is adjusted together by the first adjusting member 431 and the second adjusting member 432, so that the relative position of the first positioning protrusion 411 and the first positioning groove 11 and the relative position of the second positioning protrusion and the second positioning groove remain unchanged.

[0040] In one embodiment, Figures 1 to 4As shown, the first fastening belt 41 is provided with a first adjustment section 412, a positioning section 413 and a second adjustment section 414 along its length direction, the first adjustment section 412 is provided with a plurality of first adjustment holes 415 along its length direction, and the second adjustment section 414 is provided with a plurality of second adjustment holes 416 along its length direction; the first adjusting member 431 is provided with a first connecting end and a first adjusting end, and the second adjusting member 432 is provided with a second connecting end and a second adjusting end, the first adjusting end can be snapped into the first adjusting hole 415, the first connecting end is connected to the first end of the second fastening belt 42, the second adjusting end can be snapped into the second adjusting hole 416, and the second connecting end is connected to the second end of the second fastening belt 42. The positioning section 413 is aligned with the first end plate 1, so that the first positioning protrusion 411 is inserted into the first positioning groove 11, the second positioning protrusion on the second fastening band 42 is inserted into the second positioning groove, and the first adjustment end is correspondingly inserted into the first adjustment hole 415. By adjusting the length of the annular fastening band, the first end plate 1 and the second end plate 2 can be clamped, and it can adapt to battery modules of various sizes.

[0041] In one embodiment, Figure 6 for Figure 5 A cross-sectional view of the first adjusting member 431 along the XY plane shows that the first adjusting member 431 includes a housing 4311, an elastic member 4312, and a snap-on protrusion 4313. The housing 4311 is opened at both ends to form a first channel 43111 for the first adjusting section 412 to pass through. An accommodating groove 43112 is defined on the inner sidewall of the housing 4311. One end of the elastic member 4312 is connected to the bottom of the accommodating groove 43112, and the other end is connected to the snap-on protrusion 4313. The snap-on protrusion 4313 is telescopically connected to the accommodating groove 43112. It is also suitable for telescopic switching between the engaged position and the released position. In the engaged position, the engaged protrusion 4313 extends out of the accommodating groove 43112, passes through the first adjustment hole 415 and abuts against the inner wall of the shell 4311 opposite thereto. In the released position, the engaged protrusion 4313 shrinks into the accommodating groove 43112 to make the first adjustment section 412 slidably connected to the first channel 43111. Under the action of the elastic member 4312, the engaged protrusion 4313 has a tendency to extend in the direction from the released position to the engaged position.

[0042] The first adjustment section 412 passes through the first channel 43111. After being adjusted to an appropriate length, the elastic member 4312 pushes up the snap-fitting protrusion 4313 so that the snap-fitting protrusion 4313 is in a snap-fitting position. The snap-fitting protrusion 4313 passes through the corresponding first adjustment hole 415, thereby fixing the first adjustment section 412 to the first adjustment member 431, adjusting the length of the annular fastening belt, and clamping the battery module.

[0043] In some embodiments, the side wall of the shell 4311 is provided with a through hole 5 corresponding to the snap-fit protrusion 4313 for the extrusion rod to pass through. The extrusion rod passes through the through hole 5 and presses the snap-fit protrusion 4313 from the snap-fit position to the release position, thereby facilitating the adjustment of the tightness of the annular fastening belt.

[0044] In one embodiment, the locking protrusion 4313 is provided with a sliding portion 43131 and a locking portion 43132, the sliding portion 43131 is telescopically connected to the receiving groove 43112, and the locking portion 43132 is provided with a first inclined surface, which is inclined along the direction in which the first adjustment section 412 penetrates and away from the sliding portion 43131 (e.g., Figure 6 As shown, the first adjustment section 412 penetrates the first channel 43111 from right to left, and the first inclined surface is Figure 6 (See the schematic diagram of the inclined surface tilted toward the upper left). In the engaged position, the engaging portion 43132 passes through the first adjustment hole 415 and abuts the inner sidewall of the housing 4311 opposite thereto. In the released position, the engaging portion 43132 is located within the receiving groove 43112, allowing the first adjustment section 412 to slide in connection with the first channel 43111. When the first adjustment section 412 passes through the first channel 43111, one end of the first adjustment section 412 abuts against the first inclined surface, pressing the engaging portion 43132 downward, placing the insertion protrusion in the released position, allowing the first adjustment section 412 to slide within the first channel 43111, thereby adjusting the length of the first adjustment section 412 inserted into the first channel 43111. When the desired length is reached, the engaging portion 43132, under the action of the elastic member 4312, passes through the corresponding first adjustment hole 415, fixing the relative position of the first adjustment section 412 and the first channel 43111.

[0045] In one embodiment, the second adjustment member 432 includes a shell, an elastic member and a plug-in protrusion. The openings at both ends of the shell form a second channel for the second adjustment section 414 to pass through. A sliding groove is provided on the inner side wall of the shell. One end of the elastic member is connected to the bottom of the sliding groove, and the other end is connected to the plug-in protrusion. The plug-in protrusion is telescopically connected to the sliding groove and is suitable for telescopic switching between the plug-in position and the release position. In the plug-in position, the plug-in protrusion extends out of the sliding groove through the second adjustment hole 416 and abuts against the inner side wall of the shell opposite to it. In the release position, the plug-in protrusion shrinks into the sliding groove so that the second adjustment section 414 is slidably connected to the second channel. Under the action of the elastic member, the plug-in protrusion has a tendency to extend in the direction from the release position to the plug-in position.

[0046] The second adjustment section 414 is inserted into the second channel. After being adjusted to an appropriate length, the elastic member pushes up the plug-in protrusion so that the plug-in protrusion is in the plug-in position. The plug-in protrusion passes through the corresponding second adjustment hole 416, which can fix the second adjustment section 414 and the second adjustment member 432, adjust the length of the annular fastening belt, and clamp the battery module.

[0047] In some embodiments, the side wall of the shell is provided with a through hole corresponding to the plug-in protrusion for the pressing rod to pass through. The pressing rod passes through the through hole to press the plug-in protrusion from the plug-in position to the release position, thereby facilitating the adjustment of the tightness of the annular fastening belt.

[0048] In one embodiment, the plug-in protrusion is provided with a sliding end and a plug-in end, the sliding end is telescopically connected in the slide groove, and the plug-in end is provided with a second inclined surface, which is inclined along the insertion direction of the second adjustment section 414 and away from the sliding end. In the plug-in position, the plug-in end passes through the second adjustment hole 416 and abuts against the inner side wall of the shell opposite to it. In the released position, the plug-in end is located in the slide groove so that the second adjustment section 414 is slidably connected to the second channel.

[0049] In a specific embodiment, the first connecting end of the first adjusting member 431 is connected to the first end of the second fastening band 42, and the second connecting end of the second adjusting member 432 is connected to the second end of the second fastening band 42. The clamping portion 43132 of the first adjusting member 431 is clamped to a first adjusting hole 415, and the plug-in end of the second adjusting member 432 is plugged into a second adjusting hole 416. At this time, the size of the annular fastening band is larger, which is convenient for being mounted on the first end plate 1 and the second end plate 2. The first positioning protrusion 411 and the second positioning protrusion are correspondingly inserted into the first positioning groove 11 and the second positioning groove, and the annular fastening band is positioned at the same height of the first end plate 1 and the second end plate 2. The first adjusting section 412 and the second adjusting section 414 are adjusted to correspond to the positions in the first channel 43111 and the second channel. After adjusting the position, the clamping portion 43132 is clamped to the corresponding first adjusting hole 415, and the plug-in end is plugged into the corresponding second adjusting hole 416 to fix the size of the annular fastening band and clamp the battery module.

[0050] In a specific embodiment, the first adjusting member 431 and the second adjusting member 432 have the same structure.

[0051] In one embodiment, there are multiple first positioning grooves 11 , and the multiple first positioning grooves 11 are arranged in parallel; there are multiple second positioning grooves, and the multiple positioning grooves are arranged in parallel.

[0052] In one embodiment, the openings of the plurality of first positioning grooves 11 and the plurality of second positioning grooves are all inclined downward. The first positioning protrusions 411 and the second positioning protrusions corresponding to the first positioning grooves 11 and the second positioning grooves are inclined upward, facilitating the downward installation of the annular fastening band on the first end plate 1 and the second end plate 2.

[0053] In a specific embodiment, the first positioning groove 11 and the second positioning groove have the same structure, and the first positioning protrusion 411 and the second positioning protrusion have the same structure.

[0054] In a specific embodiment, the length direction of the multiple first positioning grooves 11 is parallel to the width direction of the first end plate 1, and the multiple first positioning grooves 11 are arranged at equal intervals along the height direction of the first end plate 1. A plurality of first positioning protrusions 411 are provided on the positioning section 413. The number of first positioning protrusions 411 is less than the number of first positioning grooves 11. The multiple first positioning protrusions 411 are arranged at equal intervals, and the distance between two adjacent first positioning protrusions 411 is equal to the distance between two adjacent first positioning grooves 11.

[0055] In a specific embodiment, 4 to 6 first positioning protrusions 411 are provided on the positioning section 413 .

[0056] In a specific embodiment, the length directions of the multiple second positioning grooves are parallel to the width direction of the second end plate 2, and the multiple second positioning grooves are arranged at equal intervals along the height direction of the second end plate 2. The second fastening belt 42 is provided with multiple second positioning protrusions, the number of second positioning protrusions is less than the number of second positioning grooves, the multiple second positioning protrusions are arranged at equal intervals, and the spacing between two adjacent second positioning protrusions is equal to the spacing between two adjacent second positioning grooves.

[0057] In a specific embodiment, 4 to 6 second positioning protrusions are provided on the second fastening belt 42 .

[0058] The first fastening belt 41 and the second fastening belt 42 have the same structure and can be replaced with each other.

[0059] In a specific embodiment, Figure 5 As shown, the battery cell is more firmly fastened by two annular fastening bands.

[0060] Although the embodiments of the present application are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations shall fall within the scope defined by the accompanying application.

Claims

1. A battery cell fastening device, characterized in that: include: a first end plate (1); a second end plate (2) spaced apart from the first end plate (1) and forming an installation gap (3) therebetween for installing a battery cell; The fastening device (4) comprises a first fastening portion and a second fastening portion, wherein the first fastening portion and the second fastening portion are connected and sleeved on the first end plate (1) and the second end plate (2). One of the first fastening portion and the first end plate (1) is provided with a first positioning protrusion (411), and the other is provided with a first positioning groove (11) suitable for cooperating with the first positioning protrusion (411); one of the second fastening portion and the second end plate (2) is provided with a second positioning protrusion, and the other is provided with a second positioning groove suitable for cooperating with the second positioning protrusion.

2. A battery core fastening device according to claim 1, characterized in that: The fastening device (4) further includes an adjusting assembly (43), wherein the first fastening portion is a first fastening belt (41), and the second fastening portion is a second fastening belt (42), the first fastening belt (41) is provided with the first positioning protrusion (411), and the second fastening belt (42) is provided with the second positioning protrusion, and the first fastening belt (41) and the second fastening belt (42) are connected and sleeved on the first end plate (1) and the second end plate (2) through the adjusting assembly (43).

3. A battery core fastening device according to claim 2, characterized in that: The adjustment assembly (43) comprises a first adjustment member (431) and a second adjustment member (432), wherein two ends of the first adjustment member (431) are respectively connected to the first end of the first fastening belt (41) and the first end of the second fastening belt (42), and two ends of the second adjustment member (432) are respectively connected to the second end of the first fastening belt (41) and the second end of the second fastening belt (42).

4. A battery core fastening device according to claim 3, characterized in that: The first fastening belt (41) is provided with a first adjustment section (412), a positioning section (413) and a second adjustment section (414) along its length direction; the first adjustment section (412) is provided with a plurality of first adjustment holes (415) along its length direction; and the second adjustment section (414) is provided with a plurality of second adjustment holes (416) along its length direction; The first adjusting member (431) is provided with a first connecting end and a first adjusting end, and the second adjusting member (432) is provided with a second connecting end and a second adjusting end, the first adjusting end can be snapped into the first adjusting hole (415), the first connecting end is connected to the first end of the second fastening belt (42), the second adjusting end can be snapped into the second adjusting hole (416), and the second connecting end is connected to the second end of the second fastening belt (42).

5. The battery core fastening device according to claim 4, characterized in that: The first adjusting member (431) includes a shell (4311), an elastic member (4312) and a clamping protrusion (4313). The two ends of the shell (4311) are opened to form a first channel (43111) for the first adjusting section (412) to pass through. The inner side wall of the shell (4311) is provided with a receiving groove (43112). One end of the elastic member (4312) is connected to the bottom of the receiving groove (43112), and the other end is connected to the clamping protrusion (4313). The clamping protrusion (4313) is telescopically connected to the receiving groove (43112) and is suitable for being adjusted between the clamping position and the release position. The clamping protrusion (4313) is telescopically switched between the release position and the locking position. In the state of the locking position, the locking protrusion (4313) extends out of the accommodating groove (43112) and passes through the first adjustment hole (415) and abuts against the inner side wall of the shell (4311) opposite thereto. In the state of the release position, the locking protrusion (4313) shrinks into the accommodating groove (43112) so that the first adjustment section (412) is slidably connected with the first channel (43111). Under the action of the elastic member (4312), the locking protrusion (4313) has a tendency to extend in the direction from the release position to the locking position.

6. The battery core fastening device according to claim 5, characterized in that: The locking protrusion (4313) is provided with a sliding portion (43131) and a locking portion (43132), the sliding portion (43131) is telescopically connected to the accommodating groove (43112), and the locking portion (43132) is provided with a first inclined surface. In the state of the locking position, the locking portion (43132) passes through the first adjustment hole (415) and abuts against the inner side wall of the shell (4311) opposite thereto. In the state of the release position, the locking portion (43132) is located in the accommodating groove (43112) so that the first adjustment section (412) is slidably connected to the first channel (43111).

7. A battery core fastening device according to claim 5 or 6, characterized in that: The second adjustment member (432) includes a shell, an elastic member and a plug-in protrusion, the two end openings of the shell form a second channel for the second adjustment section (414) to pass through, the inner side wall of the shell is provided with a slide groove, one end of the elastic member is connected to the bottom of the slide groove, and the other end is connected to the plug-in protrusion, the plug-in protrusion and the slide groove are telescopically connected and are suitable for telescopic switching between the plug position and the release position. In the state of the plug position, the plug-in protrusion extends out of the slide groove through the second adjustment hole (416) and abuts against the inner side wall of the shell opposite to it. In the state of the release position, the plug-in protrusion shrinks into the slide groove so that the second adjustment section (414) is slidably connected to the second channel. Under the action of the elastic member, the plug-in protrusion has a tendency to extend along the direction from the release position to the plug position.

8. The battery core fastening device according to claim 7, characterized in that: The plug-in protrusion is provided with a sliding end and a plug-in end, the sliding end is telescopically connected in the slide groove, and the plug-in end is provided with a second inclined surface. In the state of the plug-in position, the plug-in end passes through the second adjustment hole (416) and abuts against the inner side wall of the shell opposite thereto. In the state of the release position, the plug-in end is located in the slide groove so that the second adjustment section (414) is slidably connected to the second channel.

9. The battery core fastening device according to claim 1, characterized in that: There are a plurality of first positioning grooves (11), and the plurality of first positioning grooves (11) are arranged in parallel; there are a plurality of second positioning grooves, and the plurality of second positioning grooves are arranged in parallel.

10. The battery core fastening device according to claim 9, characterized in that: The opening directions of the plurality of first positioning grooves (11) and the plurality of second positioning grooves are all inclined downward.

Images