End plate for square-shell battery cell and square-shell battery cell

Abstract

The utility model discloses an end plate for a square-shell battery cell and the square-shell battery cell, which relate to the technical field of batteries and comprise a plate body, at least one insert nut and a plurality of exposed holes. The plate body is provided with a first side and a second side which are oppositely arranged, the first side is used for pressing a battery module, and a plurality of first caulking grooves are sequentially formed in the second side at intervals in the first direction. At least one insert nut is used for being arranged in different first caulking grooves; and the multiple exposed holes are formed in the upper side wall of the first embedding groove in a one-to-one correspondence mode, and the exposed holes are used for allowing screw holes of the insert nuts to be exposed out. The insert nuts are installed in the first caulking grooves in the corresponding positions, and the threaded holes of the insert nuts are aligned with the exposure holes, so that the threaded holes of the insert nuts are exposed out of the exposure holes; and different end plates do not need to be designed in use scenes, so that the cost of the square-shell battery cell is reduced on the whole.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an end plate for a square-shell battery cell and a square-shell battery cell. Background Technology

[0002] Rechargeable batteries, as a recyclable energy storage unit, are increasingly widely used in electric vehicles and energy storage fields. In practical applications, rechargeable batteries often require multiple individual cells to be connected in series and parallel to form a battery module. Metal cables are welded to the top of the battery module to achieve electrical connection between the multiple cells. Positive and negative electrode plates are then led out from the battery module. Metal end plates are then added to both ends of the battery module and preloaded to clamp the battery pack, forming a prismatic cell. Insert nuts are embedded in the end plates, and the electrode plates correspond to these insert nuts. External wires and electrode plates can be installed on the insert nuts using bolts, achieving conductivity between the external wires and electrode plates.

[0003] For cells of the same size, the position requirements of the insert nuts vary in different projects, often requiring different end plates to be designed for different application scenarios. Square-shell cells are relatively more expensive. Utility Model Content

[0004] The main purpose of this invention is to provide an end plate for square-shell battery cells and a square-shell battery cell, aiming to reduce the cost of square-shell battery cells.

[0005] To achieve the above objectives, the present invention proposes an end plate for a square-shell battery cell, comprising:

[0006] The plate has a first side and a second side that are disposed opposite to each other. The first side is used to press against the battery module, and the second side is provided with a plurality of first grooves spaced apart along a first direction.

[0007] At least one insert nut for being disposed within a different first recess; and,

[0008] Multiple exposed holes are provided one-to-one on the upper side wall of the first groove, and the exposed holes are used to expose the screw holes of the insert nut.

[0009] In one embodiment, the exposed hole includes a strip-shaped hole extending in the same direction as the first groove. The insert nut includes an exposed portion located within the strip-shaped hole. The strip-shaped hole is open at one end away from the first side so that when the insert nut is inserted into the first groove, the exposed portion is inserted into the exposed hole.

[0010] In one embodiment, the threaded hole of the insert nut passes through the exposed portion.

[0011] In one embodiment, snap-fit ​​blocks are provided on the opposite side walls of the strip hole, and the distance between the two snap-fit ​​blocks decreases sequentially along the direction from the first side to the second side.

[0012] In one embodiment, the second side of the plate is provided with a binding groove, which is recessed into the second side.

[0013] In one embodiment, the second side of the plate is provided with a first lifting groove, which is located within one of the binding grooves.

[0014] In one embodiment, a first insertion hole is provided on the upper side of the plate, the first insertion hole being used to fix the sampling wire harness.

[0015] In one embodiment, a second insertion hole is provided on the upper side of the plate, and the second insertion hole is used to fix the pressure strip.

[0016] In one embodiment, the plate body is provided with a first mounting hole, the first mounting hole being arranged in the vertical direction and used for a fixing bolt to pass through; and / or,

[0017] The second side of the plate is provided with a second mounting hole; and / or,

[0018] The second side of the plate is provided with a manual handling groove.

[0019] This utility model also proposes a square-shell battery cell, including the end plate for the square-shell battery cell.

[0020] The end plate for the square-shell battery cell includes:

[0021] The plate has a first side and a second side that are disposed opposite to each other. The first side is used to press against the battery module, and the second side is provided with a plurality of first grooves spaced apart along a first direction.

[0022] At least one insert nut for being disposed within a different first recess; and,

[0023] Multiple exposed holes are provided one-to-one on the upper side wall of the first groove, and the exposed holes are used to expose the screw holes of the insert nut.

[0024] In the technical solution of this utility model, when the insert nut needs to be installed, the number of insert nuts can be selected as needed, and according to the required position of the insert nut, the insert nuts are installed in the first groove at the corresponding position, and the threaded hole of the insert nut is aligned with the exposed hole so that the threaded hole of the insert nut is exposed from the exposed hole; finally, the external wire and electrode are installed on the insert nut with bolts to realize the conduction of the external wire and electrode. This eliminates the need for different end plates designed for different application scenarios, improves the adaptability of the end plate for the square-shell battery cell, and reduces the overall cost of the square-shell battery cell. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 A schematic diagram of a structural embodiment of the end plate for square-shell battery cells provided by this utility model;

[0027] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0028] Figure 3 for Figure 1 A schematic diagram of the insert nut in the diagram;

[0029] Figure 4 for Figure 1 A side view structural diagram of the end plate used for the Chinese-shell battery cell.

[0030] Explanation of icon numbers:

[0031] 1. Plate body; 11. First side; 12. Second side; 13. Binding groove; 2. First groove; 3. Insert nut; 31. Exposed part; 4. Exposed hole; 41. Snap-fit ​​block; 5. First lifting groove; 6. First insertion hole; 7. First mounting hole; 8. Second mounting hole; 9. Manual handling groove; 10. Second insertion hole;

[0032] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0034] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0035] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are 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 those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0036] Rechargeable batteries, as a recyclable energy storage unit, are increasingly widely used in electric vehicles and energy storage fields. In practical applications, rechargeable batteries often require multiple individual cells to be connected in series and parallel to form a battery module. Metal cables are welded to the top of the battery module to achieve electrical connection between the multiple cells. Positive and negative electrode plates are then led out from the battery module. Metal end plates are then added to both ends of the battery module and preloaded to clamp the battery pack, forming a prismatic cell. Insert nuts are embedded in the end plates, and the electrode plates correspond to these insert nuts. External wires and electrode plates can be installed on the insert nuts using bolts, achieving conductivity between the external wires and electrode plates.

[0037] For cells of the same size, the position requirements of the insert nuts vary in different projects, often requiring different end plates to be designed for different application scenarios. Square-shell cells are relatively more expensive.

[0038] This utility model proposes an end plate for square-shell battery cells.

[0039] Please see Figure 1 and Figure 2 In one embodiment of this utility model, the end plate for the square-shell battery cell includes a plate body 1, at least one insert nut 3, and a plurality of exposed holes 4. The plate body 1 has a first side 11 and a second side 12 disposed opposite to each other. The first side 11 is used to press against the battery module, and the second side 12 is provided with a plurality of first recesses 2 spaced apart along a first direction. At least one insert nut 3 is used to be disposed in different first recesses 2; and the plurality of exposed holes 4 are correspondingly disposed on the upper sidewall of the first recesses 2, and the exposed holes 4 are used to expose the screw holes of the insert nuts 3.

[0040] In the technical solution of this utility model, when the insert nut 3 needs to be installed, the number of insert nuts 3 can be selected as needed, and according to the required position of the insert nut 3, the insert nuts 3 are installed in the first groove 2 at the corresponding position, and the threaded hole of the insert nut 3 is aligned with the exposed hole 4 so that the threaded hole of the insert nut 3 is exposed from the exposed hole 4; finally, the external wire and electrode are installed on the insert nut 3 by bolts to realize the conduction of the external wire and electrode. Different end plates are not required for different application scenarios, improving the adaptability of the end plate for the square-shell battery cell and reducing the overall cost of the square-shell battery cell.

[0041] The plate 1 can be made of injection-molded plastic, which reduces the difficulty and cost of processing. At the same time, the plate 1 is made of insulating plastic, which reduces the guiding nature of the plate 1.

[0042] Please see Figure 1 , Figure 2 and Figure 3 The exposed hole 4 includes a strip-shaped hole, the extension direction of which is the same as the extension direction of the first groove 2. The insert nut 3 includes an exposed portion 31 located within the strip-shaped hole. The strip-shaped hole is open at one end away from the first side 11, so that when the insert nut 3 is inserted into the first groove 2, the exposed portion 31 is inserted into the exposed hole 4. By providing the strip-shaped hole, the threaded hole of the insert nut 3 can be directly exposed through the strip-shaped hole when the insert nut 3 is installed.

[0043] The width of the strip-shaped hole is smaller than the width of the insert nut 3, which prevents the insert nut 3 from coming out of the first groove 2 through the strip-shaped hole, thus improving the installation stability of the insert nut 3. Specifically, the insert nut 3 can be a T-shaped nut.

[0044] Please see Figure 1 , Figure 2 and Figure 3The threaded hole of the insert nut 3 passes through the exposed portion 31. When mounting external wires and electrodes onto the insert nut 3 with bolts, it is convenient to install the bolts into the threaded hole of the insert nut 3.

[0045] Each of the two opposite side walls of the strip-shaped hole is provided with a locking block 41, and the distance between the two locking blocks 41 decreases sequentially along the direction from the first side 11 to the second side 12. By providing the locking block 41, the sliding of the exposed part 31 in the strip-shaped hole can be limited, thereby limiting the sliding of the insert nut 3 in the first groove 2, thus improving the installation stability of the insert nut 3.

[0046] Please see Figure 1 and Figure 4 The upper side of the plate 1 is provided with a first insertion hole 6, which is used to fix the sampling harness. After the plate 1 is installed on the battery module, the status of each battery can be detected by setting the sampling harness. The sampling harness can be connected to the cable tie or the button clip, and then the cable tie or the button clip is inserted into the first insertion hole 6 to fix one end of the sampling harness. This allows one end of the sampling harness to be pressed down, thereby pressing the sampling harness onto the battery module.

[0047] The upper side of the plate 1 is provided with a second insertion hole 10, which is used to fix the pressure strip. After the plate 1 is installed on the battery module, the two ends of the pressure strip can be fixed to the two second insertion holes 10 of the plate 1 by means of bolts, connectors or snap-fit ​​rods, thereby pressing the pressure strip onto the battery module and fixing the battery module from the top.

[0048] The second insertion hole 10 is provided in two along the length direction of the plate 1, which can increase the stability of the connection between the pressure strip and the plate 1.

[0049] Please see Figure 1 and Figure 4 The second side 12 of the plate 1 is provided with a binding groove 13, which is recessed into the second side 12. By providing the binding groove 13, after the plastic steel strip is bound to the plate 1 and the battery module, the vertical movement of the plastic steel strip within the binding groove 13 can be prevented, thereby improving the firmness of the fixing of the plastic steel strip.

[0050] The binding groove 13 has two grooves arranged in the vertical direction, which can improve the binding firmness.

[0051] Please see Figure 1 and Figure 4 The second side 12 of the plate 1 is provided with a first lifting groove 5, which is located within a binding groove 13. Simultaneously, by providing the first lifting groove 5, a lifting gap can be formed on the inner side of the plastic-steel strip, facilitating the passing of the lifting hook through the gap and lifting it onto the plastic-steel strip, thus conveniently achieving the lifting of the square-shell battery cell.

[0052] The second side 12 of the plate 1 is provided with a manual handling groove 9. After the plate 1 is installed on the battery module, it is convenient to put a hand into the manual handling groove 9 and then manually handle the square-shell battery cell.

[0053] The plate 1 is provided with a first mounting hole 7, which is arranged in the vertical direction and is used for fixing bolts to pass through. When the assembled battery module and the plate 1 are placed in the box, the fixing bolts pass through the first mounting hole 7 and are threaded to the bottom wall of the box to fix the battery module and the plate 1 in the box.

[0054] Please see Figure 1 and Figure 4 The second side 12 of the plate body 1 is provided with a second mounting hole 8; when the assembled battery module and the plate body 1 are placed in the box, the fixing bolt can also be passed through the side wall of the box and inserted into the second mounting hole 8 to fix the battery module and the plate body 1 in the box.

[0055] Both the first mounting hole 7 and the second mounting hole 8 are provided in twos along the length direction of the plate 1.

[0056] This utility model also proposes a square-shell battery cell, which includes a battery module and an end plate for the square-shell battery cell. The specific structure of the end plate for the square-shell battery cell is as described in the above embodiments. Since this square-shell battery cell adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0057] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An end plate for a square-shell battery cell, characterized in that, include: The plate has a first side and a second side that are disposed opposite to each other. The first side is used to press against the battery module, and the second side is provided with a plurality of first grooves spaced apart along a first direction. At least one insert nut for being disposed within a different first recess; and, Multiple exposed holes are provided one-to-one on the upper side wall of the first groove, and the exposed holes are used to expose the screw holes of the insert nut.

2. The end plate for square-shell battery cells as described in claim 1, characterized in that, The exposed hole includes a strip-shaped hole, the extension direction of which is the same as the extension direction of the first groove. The insert nut includes an exposed portion located inside the strip-shaped hole. The strip-shaped hole is opened at one end away from the first side so that when the insert nut is inserted into the first groove, the exposed portion is inserted into the exposed hole.

3. The end plate for square-shell battery cells as described in claim 2, characterized in that, The threaded hole of the insert nut passes through the exposed portion.

4. The end plate for square-shell battery cells as described in claim 2, characterized in that, Each of the two opposite side walls of the strip hole is provided with a snap-fit ​​block, and the distance between the two snap-fit ​​blocks decreases sequentially along the direction from the first side to the second side.

5. The end plate for a prismatic battery cell as described in claim 1, characterized in that, The second side of the plate is provided with a binding groove, which is recessed in the second side.

6. The end plate for a prismatic battery cell as described in claim 5, characterized in that, The second side of the plate is provided with a first lifting groove, which is located within one of the binding grooves.

7. The end plate for a prismatic battery cell as described in claim 1, characterized in that, The upper side of the plate is provided with a first insertion hole, which is used to fix the sampling wire harness.

8. The end plate for a prismatic battery cell as described in claim 1, characterized in that, A second insertion hole is provided on the upper side of the plate, which is used to fix the pressure strip.

9. The end plate for a prismatic battery cell as described in claim 1, characterized in that, The plate body has a first mounting hole that extends through it, the first mounting hole being arranged in the vertical direction and used for a fixing bolt to pass through; and / or, The second side of the plate is provided with a second mounting hole; and / or, The second side of the plate is provided with a manual handling groove.

10. A square-shell battery cell, characterized in that, Includes the end plate for square-shell battery cells as described in any one of claims 1 to 9.

Images