Battery cell fastener

Abstract

The utility model relates to a battery cell fastener which comprises a fastener body assembled on the peripheral surface of a battery cell, the fastening piece comprises a left frame piece and a right frame piece, and the left frame piece and the right frame piece are assembled into a whole through a buckling mechanism. The buckling mechanism comprises clamping hooks and clamping grooves which are correspondingly matched and connected in an inserted mode one to one. The end edges of the connecting ends of the left frame piece and the right frame piece are integrally provided with the corresponding clamping hooks and the corresponding clamping grooves respectively. And the battery cell is clamped between the left frame piece and the right frame piece in an interference pressing manner. The left frame piece and the right frame piece of the fastener are clamped through a fixed number of buckle mechanisms, the fastener can be assembled through one-time extrusion of auxiliary equipment, the extrusion acting force applied by each fastener to a battery cell is the same, and standardized production is facilitated.

Description

Technical Field

[0001] The utility model relates to an electric core protection accessory, in particular to an electric core fastener used for restraining and protecting the electric core. Background Art

[0002] Portable outdoor energy storage power supplies are increasingly being used, and the battery cell is the core component. The battery cell will gradually decay during use, and will generate expansion force during the decay process. If the expansion is allowed, the decay will intensify, the service life will be reduced, and it will also cause safety problems. Therefore, the fasteners of the battery cell need to continuously apply a certain pressure to the battery cell, and the pressure must be greater than 3000 Newtons.

[0003] Existing battery cell fastening devices mostly use metal plates to wrap around the battery cells, or use special shells to be assembled on the outside of the battery cells through bolts. For example, the Chinese utility model with application number 202023339637.3 discloses a fastening belt that can adapt to different square battery cell sizes, which includes a square battery cell shell, a bandage, a bandage pressure plate and a fixing screw. The bandage is put on the fixing screw column through the set hole to embrace the shell body of the square battery cell shell; the bandage pressure plate is provided with a fastening installation hole corresponding to the fixing screw column; the fixing screw is threadedly connected to the fixing screw column through the fastening installation hole to fasten the bandage to the shell body of the square battery cell shell. Although this method can apply a tightening force to the battery cell, it needs to be coordinated with the bolt locking operation during the installation process. First of all, the installation process is relatively cumbersome. More importantly, it is difficult to adjust the tightening force of the fastening device on the battery cell to the required pressure by the bolt locking method. There are large differences in the tightening forces of different batches of fastening devices installed, which makes it difficult to achieve standardized production and also leads to the above-mentioned problems of increased attenuation and safety hazards in the battery cell. Summary of the invention

[0004] The utility model provides a battery core fastener to overcome the problem of difficulty in fast and standardized fastening force installation in the structure of the existing battery core fastening device.

[0005] The utility model adopts the following technical solutions:

[0006] A battery cell fastener comprises a fastener mounted on the outer circumference of the battery cell; the fastener comprises a left frame member and a right frame member, and the left frame member and the right frame member are assembled as a whole through a snap mechanism; the snap mechanism comprises a one-to-one corresponding plug-in hook and a slot, and the end edges of the connecting ends of the left frame member and the right frame member are respectively provided with corresponding hooks and slots; the battery cell is clamped between the left frame member and the right frame member in an interference-pressing manner.

[0007] As a further improvement, the hook comprises a hook end and a base end which are integrally connected, and the gap between two adjacent base ends forms the hook slot.

[0008] As a further improvement, each of the base ends is provided with two hook ends distributed in mirror symmetry, and the hook parts of the two hook ends are arranged outwards.

[0009] As a further improvement, the base end is integrally provided with a reinforcing rib, and the reinforcing rib and the hook end are respectively arranged on two opposite side surfaces of the base end, and the hook end, the base end and the reinforcing rib all protrude from the outer peripheral surfaces of the left frame member and the right frame member.

[0010] As a further improvement, the left frame member and the right frame member are integrally injection-molded parts made of flexible plastic.

[0011] As a further improvement, the left frame member and the right frame member are connected to form a container structure with only the top open, and the end surface of the electrode connection end of the battery cell is arranged on the inner side of the open end edge of the fastener.

[0012] According to a further improvement, the left frame member and the right frame member are components with the same structure, the battery cell is a square structure, the base ends of the front side edge and the rear side edge of the left frame member are connected as a whole by laterally extending reinforcing ribs, the bottom side edge and the upper side edge of the left frame member are connected as a whole by longitudinally extending reinforcing ribs, and the laterally extending and longitudinally extending reinforcing ribs are cross-connected as a whole.

[0013] As a further improvement, all of the hooks are hooks that can withstand a pulling force greater than 200 Newtons, and six of the hooks are respectively provided on the front and rear edges of the left frame member, and four of the hooks are provided on the bottom edge of the left frame member, with a total of 32 hooks for the left and right frame members.

[0014] As a further improvement, the base ends of the left frame member and the right frame member are respectively provided with guide rods and guide through holes that are plugged in and out in a one-to-one correspondence.

[0015] From the above description of the structure of the utility model, it can be seen that compared with the prior art, the utility model has the following advantages: the left and right frame members of the fastener of the utility model are connected by a fixed number of snap mechanisms, and the assembly of the fastener can be completed by one-time extrusion through auxiliary equipment, and the extrusion force applied by each fastener to the battery cell is the same, which is convenient for standardized production; in addition, the setting of the hook end, the base end and the reinforcing rib protruding from the outer peripheral surface of the fastener can effectively enhance the structural strength and compressive resistance of the fastener, which is beneficial to apply a fixed value of clamping pressure to the battery cell for a long time, and is safer to use; in addition, the left and right frame members have the same structure and can be injection molded in one time, which is convenient for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the battery core fastener of the utility model in a first viewing direction.

[0017] Figure 2It is a structural schematic diagram of the front side of the battery core fastener of the utility model.

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the battery core fastener of the utility model in the second viewing direction. DETAILED DESCRIPTION

[0019] The specific implementation of the present utility model is described below with reference to the accompanying drawings.

[0020] Reference Figures 1 to 3 , the battery cell fasteners include fasteners assembled on the outer circumference of the battery cell 4. The fasteners include a left frame member 1 and a right frame member 2, which are assembled into one piece through a buckle mechanism 3; the buckle mechanism 3 includes a one-to-one corresponding hook 31 and a slot 30, and the end edges of the connection ends of the left frame member 1 and the right frame member 2 are respectively provided with corresponding hooks 31 and slots 30; the battery cell 4 is clamped between the left frame member 1 and the right frame member 2 with interference compression.

[0021] Continue to refer to Figures 1 to 3 The hook 31 includes a hook end 311 and a base end 312 connected in one piece, and the gap between two adjacent base ends 312 forms the slot 30. Figures 1 to 3 Each of the base ends 312 is provided with two hook ends 311 distributed in a mirror-symmetrical manner, and the hook parts of the two hook ends 311 are arranged outward.

[0022] Continue to refer to Figures 1 to 3 The base end 312 is integrally provided with a reinforcing rib 313, and the reinforcing rib 313 and the hook end 311 are respectively arranged on two opposite side surfaces of the base end 312, and the hook end 311, the base end 312 and the reinforcing rib 313 all protrude from the outer peripheral surfaces of the left frame member 1 and the right frame member 2.

[0023] Continue to refer to Figures 1 to 3 The left frame member 1 and the right frame member 2 are plastic integrally injection molded parts with flexibility. The left frame member 1 and the right frame member 2 are connected to form a container structure with only the top open, and the end surface of the electrode connection end of the battery cell 4 is arranged on the inner side of the open end edge of the fastener. The left frame member 1 and the right frame member 2 are parts with the same structure, such as Figures 1 to 3 As shown, the battery cell 4 is a square structure, the base ends 312 of the front and rear edges of the left frame member 1 are connected as a whole through a laterally extending reinforcing rib 313a, the bottom and upper edges of the left frame member 1 are connected as a whole through a longitudinally extending reinforcing rib 313b, and the laterally extending and longitudinally extending reinforcing ribs 313 are cross-connected as a whole.

[0024] Continue to refer to Figures 1 to 3All the hooks 31 are hooks 31 that can withstand a tensile force greater than 200 Newtons. The front and rear edges of the left frame 1 are provided with 6 hooks 31, and the bottom edge of the left frame 1 is provided with 4 hooks 31. The left frame 1 and the right frame 2 have a total of 32 hooks 31 that can provide a total tensile force of more than 6000 Newtons. By utilizing the flexibility of plastic, after releasing the upper end pressure, the fastener will always maintain a pressure of 6000 Newtons on the battery cell 4, and the battery cell 4 can be squeezed and is not completely hardened and solid.

[0025] Continue to refer to Figures 1 to 3 The base ends 312 of the left frame member 1 and the right frame member 2 are respectively provided with corresponding guide rods 314 and guide through holes 310. Figures 1 to 3 As shown, a total of four guide rods 314 are provided at the four corners of the fastener, and the guide rods 314 play a guiding role during the installation process.

[0026] Continue to refer to Figures 1 to 3 The installation method of the fastener is: stack the left frame 1, the battery cell 4, and the right frame 2 in order, then put them down, place them on the installation equipment, and use a high-pressure cylinder to press the upper end until the hook 31 is buckled on the slot 30. The inner side of the fastener is reversely deformed by 1.5mm to increase the yield strength of the fastener. The left and right frame members 2 of the fastener of the utility model are connected by a fixed number of buckle mechanisms, and the assembly of the fastener can be completed by one-time extrusion of auxiliary equipment, and the extrusion force applied by each fastener to the battery cell 4 is the same, which is convenient for standardized production; in addition, the setting of the hook end 311, the base end 312 and the reinforcing rib 313 protruding from the outer peripheral surface of the fastener can effectively enhance the structural strength and compressive resistance of the fastener, which is conducive to applying a fixed value of clamping pressure to the battery cell 4 for a long time, and is safer to use; in addition, the left and right frame members 2 have the same structure and can be injection molded at one time, which is convenient for mass production.

[0027] The above is only a specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. A battery cell fastener, comprising a fastener mounted on the outer peripheral surface of a battery cell; characterized in that: The fastener comprises a left frame member and a right frame member, and the left frame member and the right frame member are assembled into one by a snap mechanism; the snap mechanism comprises a one-to-one corresponding plug-in hook and a slot, and the end edges of the connecting ends of the left frame member and the right frame member are respectively provided with corresponding hooks and slots; the battery cell is clamped between the left frame member and the right frame member with interference fit.

2. The battery core fastener according to claim 1, characterized in that: The hook comprises a hook end and a base end which are integrally connected, and the gap between two adjacent base ends forms the hook slot.

3. The battery core fastener according to claim 2, characterized in that: Two hook ends are arranged on each base end and are distributed in a mirror-symmetrical manner, and the hook parts of the two hook ends are arranged outwards.

4. The battery core fastener according to claim 2 or 3, characterized in that: The base end is integrally provided with a reinforcing rib, and the reinforcing rib and the hook end are respectively arranged on two opposite side surfaces of the base end, and the hook end, the base end and the reinforcing rib all protrude from the outer peripheral surfaces of the left frame member and the right frame member.

5. The battery core fastener according to claim 4, characterized in that: The left frame member and the right frame member are integrally injection-molded parts made of flexible plastic.

6. The battery core fastener according to claim 5, characterized in that: The left frame member and the right frame member are connected to form a container structure with only the top open, and the end surface of the electrode connection end of the battery cell is arranged on the inner side of the open end edge of the fastener.

7. The battery core fastener according to claim 6, characterized in that: The left frame member and the right frame member are components with the same structure. The battery cell is a square structure. The base ends of the front side edge and the rear side edge of the left frame member are connected as a whole through transversely extending reinforcing ribs. The bottom side edge and the upper side edge of the left frame member are connected as a whole through longitudinally extending reinforcing ribs. The transversely extending and longitudinally extending reinforcing ribs are cross-connected as a whole.

8. The battery core fastener according to claim 7, characterized in that: All of the hooks are hooks that can withstand a pulling force greater than 200 Newtons. Six of the hooks are respectively provided on the front and rear edges of the left frame member, and four of the hooks are provided on the bottom edge of the left frame member.

9. The battery core fastener according to claim 8, characterized in that: The base ends of the left frame member and the right frame member are respectively provided with guide rods and guide through holes that are plugged in and matched with each other in a one-to-one manner.

Images