A battery top cover and a battery

Abstract

The utility model provides a kind of battery top cover and battery, belong to battery field, including the through-hole being opened in cover plate;Pole is placed in through-hole;First terminal and second terminal are all set on the end face of cover plate towards battery exterior;First gusset is filled and set between first terminal and second terminal and cover plate;First terminal and second terminal are oppositely set on the axial two sides of pole, and the side of first terminal and second terminal oppositely is all opened with gap, and the shape surrounded by two gaps is same with the radial shape of pole, so that first terminal and second terminal abut and clamp pole.The utility model divides pole terminal into left and right two terminals, and the whole terminal is enclosed by two terminals and clamps pole, so that riveting action is cancelled in terminal installation process, and direct mutual insertion is carried out by using its own mechanism form, and then pole is fixed, manufacturing cost is reduced, and manufacturing time is reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery top cover and a battery. Background Technology

[0002] The top cover is an indispensable part of a power battery. Connected to the battery's aluminum casing, it isolates the internal environment of the cell while allowing communication between the cell and the outside. Currently, the terminal structure on domestic battery top covers is fixed using injection molding or riveting, which involves deforming the terminal to secure it. This assembly process is complex, especially for the terminal terminals, which require copper-aluminum friction welding or copper-aluminum composite welding, followed by machining, and finally injection molding and riveting to the top cover body. This makes the entire assembly process complex, increasing material and production costs. For example, Chinese patent CN214227018U discloses a power battery top cover where the lower positive terminal is fixed to the bottom of the upper positive terminal by a positive rivet; the upper negative terminal passes through an insulating component, a cover plate, and a lower plastic layer, and is fixed to the bottom of the positive and negative terminals by a negative rivet. However, this riveting installation method, which deforms the terminal to fit the terminal, makes the process complex. Utility Model Content

[0003] In view of this, the present invention proposes a battery top cover and a battery to solve the problem that the current method of riveting the terminal blocks results in a relatively complex process.

[0004] The technical solution of this utility model is implemented as follows: This utility model provides a battery top cover, including a cover plate with a through hole; a terminal post inserted into the through hole; a first terminal and a second terminal, both disposed on the end face of the cover plate facing the outside of the battery; a first pad, filling the space between the first terminal and the second terminal and the cover plate; wherein, the first terminal and the second terminal are disposed opposite each other on both sides of the axial direction of the terminal post, and notches are provided on the opposite sides of the first terminal and the second terminal, the shape formed by the two notches being the same as the radial shape of the terminal post, so that the first terminal and the second terminal abut against each other and clamp the terminal post.

[0005] Based on the above technical solutions, preferably, the part of the pole extending to the cover plate facing the outside of the battery has an insertion hole, and both ends of the insertion hole penetrate the outer peripheral wall of the pole; a pin is provided on the side of the first terminal with a notch, one end of the pin is placed in the notch and the other end is inserted into the insertion hole.

[0006] More preferably, the surface of the first terminal facing the cover plate has two slots, which are symmetrically arranged on both sides of the notch, and one end of the slot extends to the side of the notch of the first terminal; the side of the notch of the second terminal has two blocks, which are symmetrically arranged on both sides of the notch, and the two blocks are aligned with the two slots respectively. The first terminal and the second terminal abut against each other and the blocks are inserted into the slots, and the first terminal presses the second terminal against the first pad.

[0007] Even more preferably, when the pin is inserted into the socket, the first terminal is in close contact with the first pad.

[0008] Based on the above technical solutions, preferably, a groove is formed on the surface of the first pad facing the outside of the battery, and the first terminal and the second terminal are disposed in the groove.

[0009] Based on the above technical solutions, preferably, a base plate is provided on the end of the electrode post extending to the side of the cover plate facing the inside of the battery, and the base plate is closely attached to the end face of the cover plate facing the inside of the battery.

[0010] More preferably, it also includes a second pad, which is laid on the end face of the cover plate facing the inside of the battery; wherein the second pad is sandwiched between the base plate and the cover plate.

[0011] In a further preferred embodiment, the second pad has a window opening through which the pole post passes. The inner diameter of the window opening is larger than the inner diameter of the through hole, and the inner diameter of the through hole is not smaller than the diameter of the pole post.

[0012] A further preferred embodiment includes a sealing ring, which is tightly fitted onto the pole post; wherein the sealing ring is located inside the window hole and sandwiched between the base plate and the cover plate.

[0013] On the other hand, this utility model also provides a battery that uses the above-mentioned battery top cover.

[0014] The battery top cover and battery of this utility model have the following advantages over the prior art:

[0015] (1) This utility model divides the pole terminal into two terminals, left and right. The two terminals form a whole and clamp the pole, so that the terminal installation process eliminates the riveting action and directly uses its own structural form to insert into each other, thereby fixing the pole, reducing manufacturing cost and manufacturing time.

[0016] (2) In this utility model, a pad is filled between the two terminals and the upper surface of the top cover. The pad is an upper plastic pad, which serves to seal and insulate, and at the same time, it uses its elasticity to squeeze the two terminals to fix them on the top cover. Attached Figure Description

[0017] 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 these drawings without creative effort.

[0018] Figure 1 This is a perspective view of the top cover of this utility model;

[0019] Figure 2 This is a partial side sectional view of the top cover of this utility model.

[0020] In the diagram: 1. Cover plate; 101. Through hole; 2. Pole post; 21. Base plate; 201. Insertion hole; 3. First terminal; 31. Pin; 301. Notch; 302. Slot; 4. Second terminal; 41. Locking block; 5. First pad; 501. Slide groove; 6. Second pad; 601. Window hole; 7. Sealing ring. Detailed Implementation

[0021] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0022] like Figure 1 As shown, combined with Figure 2 The present invention provides a battery top cover, comprising a cover plate 1,

[0023] The cover plate 1 is made of plain aluminum sheet, and has two through holes 101, which are located near both ends of the cover plate 1. The cover plate 1 will also be equipped with an explosion-proof valve and a liquid injection hole.

[0024] The terminal post 2 is inserted into the through hole 101. There are two terminals 2, one positive and one negative. The inner end of the terminal post 2 is connected to the tab of the battery core or to the current collector.

[0025] Both the first terminal 3 and the second terminal 4 are located on the end face of the cover plate 1 facing the outside of the battery. The first terminal 3 and the second terminal 4 are positioned opposite each other on both sides of the axial direction of the electrode post 2. Notches 301 are provided on the opposite sides of the first terminal 3 and the second terminal 4. The shape formed by the two notches 301 is the same as the radial shape of the electrode post 2, so that the first terminal 3 and the second terminal 4 abut against and clamp the electrode post 2. Then, the notches 301 of the first terminal 3 and the second terminal 4 are welded to the outer contour of the electrode post 2 by laser welding technology. The electrode post terminal is generally square in shape and is installed on the outer end of the electrode post 2 by riveting. However, in this embodiment, the electrode post terminal is divided into two parts, namely the first terminal 3 and the second terminal 4. The first terminal 3 and the second terminal 4 surround the outer end of the electrode post 2 and are installed on the outer end of the electrode post 2 by their own structural form, rather than being fixed to the electrode post 2 by deformation, thus greatly simplifying the process steps.

[0026] The first pad 5 is filled and disposed between the first terminal 3 and the second terminal 4 and the cover plate 1. The first pad 5 is an upper plastic plate, whose original function is to provide insulation to prevent the current generated by the chemical reaction inside the battery from being conducted through the terminal post to the battery casing, forming an electrical circuit and causing leakage. At the same time, the upper plastic plate also serves to form a sealing structure at the outer end of the through hole 101 to prevent the electrolyte inside the battery from leaking through the through hole 101. Since this embodiment uses the first terminal 3 and the second terminal 4 to clamp the outer end of the terminal post 2 for installation, the first pad 5 has plastic elasticity, so its upper and lower surfaces are tightly attached to the lower surfaces of the first terminal 3 and the second terminal 4 and the upper surface of the cover plate 1, respectively, so that the first terminal 3 and the second terminal 4 are not suspended below and can be firmly fixed on the terminal post 2.

[0027] exist Figure 2 In a preferred embodiment shown, the portion of the terminal post 2 extending to the cover plate 1 facing the outside of the battery has an insertion hole 201, with both ends of the insertion hole 201 penetrating the outer peripheral wall of the terminal post 2; a pin 31 is provided on the side of the notch 301 of the first terminal 3, with one end of the pin 31 disposed in the notch 301 and the other end inserted into the insertion hole 201, thereby fixing the first terminal 3 to the terminal post 2. A slot can also be provided in the middle of the notch 301 of the second terminal 4. The pin 31 on the first terminal 3 can be set to be relatively long, and the pin 31 passes through the insertion hole 201 and is inserted into the slot of the second terminal 4, thereby fixing the second terminal 4 as well.

[0028] exist Figure 1In a preferred embodiment shown, two slots 302 are formed on the surface of the first terminal 3 facing the cover plate 1. The two slots 302 are symmetrically arranged on both sides of the notch 301, and one end of the slot 302 extends through to the side of the notch 301 of the first terminal 3. Two blocks 41 are provided on the side of the notch 301 of the second terminal 4. The two blocks 41 are symmetrically arranged on both sides of the notch 301, and the two blocks 41 are respectively aligned with the two slots 302. The first terminal 3 and the second terminal 4 abut against each other and insert the blocks 41 into the slots 302, so that the first terminal 3 presses the second terminal 4 onto the first pad 5. Since the first terminal 3 is fixed to the pole post 2 by the pin 31, when the blocks 41 are inserted into the slots 302, it can be regarded as the first terminal 3 pressing the blocks 41 onto the first pad 5, which means that the second terminal 4 is pressed onto the first pad 5, thus preventing the second terminal 4 from detaching from the first terminal 3, and making the pole post terminal as a whole form a stable structure.

[0029] exist Figure 2 In a preferred embodiment shown, when the pin 31 is inserted into the socket 201, the first terminal 3 is in close contact with the first pad 5, and since the first terminal 3 is fixed to the pole post 2 by the pin 31, the first terminal 3 is pressed tightly onto the first pad 5; at the same time, the second terminal 4 is pressed onto the first pad 5 by the cooperation of the locking block 41 and the locking groove 302; therefore, the pole post terminal formed by the first terminal 3 and the second terminal 4 is firmly pressed onto the first pad 5.

[0030] exist Figure 2 In a preferred embodiment shown, a groove 501 is provided on the surface of the first pad 5 facing the outside of the battery. The first terminal 3 and the second terminal 4 are disposed in the groove 501, which restricts the left and right displacement of the first terminal 3 and the second terminal 4. However, the terminal structure formed by the first terminal 3 and the second terminal 4 does not meet the installation requirements.

[0031] exist Figure 2 In a preferred embodiment shown, a base plate 21 is provided on the end of the electrode post 2 extending to the end of the cover plate 1 facing the inside of the battery. The base plate 21 is closely attached to the end face of the cover plate 1 facing the inside of the battery. The base plate 21 serves to limit the electrode post 2 from moving out of the through hole 101 and disengaging from the through hole 101.

[0032] exist Figure 1 In a preferred embodiment shown, a second pad 6 is further included, which is laid on the end face of the cover plate 1 facing the inside of the battery; wherein, the second pad 6 is sandwiched between the bottom plate 21 and the cover plate 1. The second pad 6 is a lower plastic pad, which also serves as an insulator.

[0033] exist Figure 2In a preferred embodiment shown, a window 601 is provided on the second pad 6, through which the pole post 2 passes. The inner diameter of the window 601 is larger than the inner diameter of the through hole 101, and the inner diameter of the through hole 101 is not smaller than the diameter of the pole post 2. This avoids the pole post 2 from forming an interference fit with the second pad 6 or the cover plate 1, which would lead to assembly difficulties, and also avoids deformation damage to the pole post 2 during installation.

[0034] exist Figure 1 In a preferred embodiment shown, a sealing ring 7 is also included, which is tightly fitted onto the terminal post 2. The sealing ring 7 is located inside the window 601 and sandwiched between the base plate 21 and the cover plate 1. The sealing ring 7 forms a sealing structure at the inner end of the terminal post 2 to avoid the risk of electrolyte leakage inside the battery.

[0035] like Figure 1 As shown, combined with Figure 2 The present invention provides a battery that uses a battery top cover according to any of the above embodiments.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery top cover, characterized in that, include: A cover plate (1) has a through hole (101) on it. The pole post (2) is inserted into the through hole (101); The first terminal (3) and the second terminal (4) are both disposed on the end face of the cover plate (1) facing the outside of the battery; The first pad (5) is filled between the first terminal (3) and the second terminal (4) and the cover plate (1); The first terminal (3) and the second terminal (4) are arranged opposite each other on the axial sides of the pole post (2). The sides opposite to the first terminal (3) and the second terminal (4) are provided with notches (301). The shape formed by the two notches (301) is the same as the radial shape of the pole post (2), so that the first terminal (3) and the second terminal (4) abut against each other and clamp the pole post (2).

2. The battery top cover according to claim 1, characterized in that: The electrode post (2) extends to the part of the cover plate (1) facing the outside of the battery and has an insertion hole (201) inside. Both ends of the insertion hole (201) penetrate the outer peripheral wall of the electrode post (2). The first terminal (3) has a notch (301) on its side with a pin (31), one end of which is located in the notch (301) and the other end is inserted into the socket (201).

3. A battery top cover according to claim 2, characterized in that: Two slots (302) are provided on the surface of the first terminal (3) facing the cover plate (1). The two slots (302) are symmetrically arranged on both sides of the notch (301). One end of the slot (302) extends through to the side of the notch (301) of the first terminal (3). The second terminal (4) has two locking blocks (41) on the side of the notch (301). The two locking blocks (41) are symmetrically arranged on both sides of the notch (301). The two locking blocks (41) are respectively aligned with the two slots (302). The first terminal (3) abuts against the second terminal (4) and inserts the locking blocks (41) into the slots (302), and the first terminal (3) presses the second terminal (4) onto the first pad (5).

4. A battery top cover according to claim 3, characterized in that: When the pin (31) is inserted into the socket (201), the first terminal (3) is in close contact with the first pad (5).

5. A battery top cover according to claim 1, characterized in that: The first pad (5) has a groove (501) on its surface facing the outside of the battery, and the first terminal (3) and the second terminal (4) are disposed in the groove (501).

6. A battery top cover according to claim 1, characterized in that: The pole post (2) extends to the end of the cover plate (1) facing the inside of the battery and is provided with a base plate (21). The base plate (21) is closely attached to the end face of the cover plate (1) facing the inside of the battery.

7. A battery top cover according to claim 6, characterized in that, Also includes: The second pad (6) is laid on the end face of the cover plate (1) facing the inside of the battery; The second pad (6) is sandwiched between the bottom plate (21) and the cover plate (1).

8. A battery top cover according to claim 7, characterized in that: The second pad (6) has a window hole (601) through which the pole post (2) passes. The inner diameter of the window hole (601) is greater than the inner diameter of the through hole (101), and the inner diameter of the through hole (101) is not less than the diameter of the pole post (2).

9. A battery top cover according to claim 8, characterized in that, Also includes: A sealing ring (7) is tightly fitted onto the pole post (2); The sealing ring (7) is located inside the window hole (601) and sandwiched between the bottom plate (21) and the cover plate (1).

10. A battery, characterized in that: A battery top cover as described in any one of claims 1 to 9.

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