Pole and battery

Abstract

The utility model provides a pole and a battery, and relates to the technical field of lithium batteries. The pole comprises a pole head and a pole body, the lower surface of the pole head is connected with the upper surface of the pole body, two holes are formed in the side face of the pole body, positioning balls are embedded into the two holes respectively, and the two positioning balls are connected through a spring. The pole can rotate in the cover plate, stress is released flexibly through rotation, the risk that CCS falls off is avoided, and therefore the durability of the battery is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of lithium battery, in particular to a pole and battery. BACKGROUND

[0002] The statements in this part only provide background technical information related to the utility model and do not necessarily constitute prior art.

[0003] In the present stage module production process, the pole is usually assembled on the cover plate of the battery by welding, so that the pole is integrated with the cover plate. Welding has the advantages of fast speed, large depth and small deformation. However, during the welding process of the wire harness plate integrated part (Cell s Contact System, CCS), there will be internal stress between the overall pole and CCS after laser welding cooling, and the thickness change of the battery during the charging process will also cause the CCS to be subjected to tension, and the welding position will be subjected to long-term stress, which will cause the risk of falling off and poor contact. UTILITY MODEL CONTENT

[0004] In order to solve the problems of the prior art, the utility model provides a pole and battery, the pole can rotate in the cover plate, and the stress is released by rotating flexibility to avoid the risk of CCS falling off, so as to improve the durability of the battery.

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

[0006] The utility model provides a pole in the first aspect, including pole head and pole body, the lower surface of pole head is connected with the upper surface of pole body, two holes are arranged on the side surface of pole body, two holes are respectively embedded with positioning ball, and two positioning balls are connected through spring.

[0007] Further, the positioning ball is a steel ball.

[0008] Further, the distance between the two holes is less than the diameter of the pole body.

[0009] Further, a circumferential annular groove is arranged at the position close to the lower end of the pole body, and a sealing ring is sleeved on the annular groove.

[0010] Further, the sealing ring is made of rubber material.

[0011] The utility model provides a battery in the second aspect, including cover plate and the pole of the first aspect.

[0012] Further, the cover plate is cylindrical, a circular through hole is arranged in the middle, and the pole penetrates the upper surface and the lower surface of the cover plate through the circular through hole.

[0013] Further, the pole head is exposed on the upper surface of the cover plate, and the bottom of the pole body and the bottom of the cover plate are on the same horizontal plane.

[0014] Further, the pole post head diameter is greater than the circular through hole diameter, and the pole post stem diameter is less than the circular through hole diameter.

[0015] Further, the cover plate inner side is provided with an inner groove adapted to the positioning ball, and the positioning ball is located in the inner groove after the cover plate is combined with the pole post.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] The utility model discloses a pole post and battery, through setting up positioning steel ball and spring in the pole post, make steel ball can along with the recess of cover plate remove, thereby drive pole post rotates in the cover plate, avoided due to the CCS welding process laser welding cooling after the whole pole post and CCS exist internal stress or charging process battery thickness change also lead to CCS received tension, appear the defect of contact bad of falling off. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings accompanying the specification provide further understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model.

[0019] Figure 1 It is the pole post structure schematic diagram of the utility model embodiment one,

[0020] Figure 2 It is the battery structure whole schematic diagram of the utility model embodiment two,

[0021] Figure 3 It is the battery structure section view of the utility model embodiment two.

[0022] In the drawing: 1, cover plate, 2, pole post, 3, spring, 4, positioning ball, 5, sealing ring. DETAILED DESCRIPTION

[0023] The utility model will be further described below in connection with the drawings and embodiments.

[0024] The terms in the utility model should be understood broadly, for example, can be fixed connection, can be detachable connection, or be integral, can be mechanical connection, can be direct connection, can be indirect connection through intermediate medium, can be two element internal connection, or two element interaction, for the ordinary skilled in the art, can understand the specific meaning of the terms in the utility model according to specific circumstances.

[0025] Embodiment one:

[0026] The utility model discloses a pole on the basis of prior art to solve the technical problem in the background art, like Figure 1 As shown, including pole head and pole body, the lower surface of pole head is connected with the upper surface of pole body, two holes are arranged on the side surface of pole body, two locating balls 4 are embedded in the two holes respectively, and the two locating balls are connected through a spring 3.

[0027] In a specific embodiment, a circular groove is arranged on the pole body near the lower end, and a sealing ring 5 is sleeved on the circular groove, which is used to prevent the leakage of electrolyte in the pole. The sealing ring 5 is made of rubber material, and in this embodiment, fluoroelastomer is used to make the sealing ring 5. The size of the sealing ring 5 can be adaptively designed according to different battery cells. The sealing ring has sealing oil during assembly, so the rotation of the pole at a small angle can ignore the friction between the sealing ring and the cover plate.

[0028] In a specific embodiment, the locating ball 4 is a steel ball, and the spring 3 is also made of steel. In this embodiment, the locating ball 4 is made of 45# steel, and the spring 3 is made of 65# steel.

[0029] In a specific embodiment, the distance between the two holes is less than the diameter of the pole body, and the specific diameter is designed according to the actual situation. The diameter of the two holes is slightly larger than the diameter of the steel ball. The two holes are hollow, forming a cavity inside the pole, and the spring 3 is arranged inside the cavity. The two ends of the spring 3 are fixedly connected to the two locating balls 4, and the spring is in a compressed state inside the cavity.

[0030] The pole designed by the utility model can rotate when the battery cell is welded CCS, thereby offsetting the circumferential stress of the pole to improve the safety of the battery pack, reducing the setting of the explosion-proof valve, and reducing the cost of the battery.

[0031] Example two:

[0032] The utility model provides a kind of battery, as shown in Figure 2 The utility model discloses a kind of battery, as shown in

[0033] In a specific embodiment, as shown in Figure 3As shown, the cover plate 1 is cylindrical, and a circular through hole is arranged in the middle, and the pole post 2 penetrates the upper surface and the lower surface of the cover plate 1 through the circular through hole. The pole post head is exposed on the upper surface of the cover plate 1, and the diameter of the pole post head is greater than the diameter of the circular through hole, so that the pole post head can be clamped on the cover plate, preventing the pole post from falling off. The bottom of the pole post body is at the same level as the bottom of the cover plate. The diameter of the pole post body is smaller than the diameter of the circular through hole. There is a certain gap between the pole post body and the inner wall of the cover plate, and the rotation of the pole post is realized by the contact of the positioning ball with the inner wall and the rolling of the positioning ball.

[0034] In a specific embodiment, a circle of inner grooves adapted to the positioning ball is arranged on the inner side of the cover plate 1, and after the combination of the cover plate 1 and the pole post 2, the positioning ball 4 is located in the inner groove.

[0035] The battery assembly method of the embodiment is as follows: the pole post body is assembled into the spring, then the positioning balls are assembled on both sides of the spring, and then the whole is assembled into the cover plate. The positioning steel ball is matched with the inner groove of the cover plate, and the steel ball is limited on the cover plate body together with the pole post, so that the pole post can rotate 360° relative to the cover plate.

[0036] The battery execution principle of the embodiment is as follows:

[0037] When the pole post is welded, the adjacent cell pole post will rotate a small angle to release stress, so as to ensure that the pole post and the CCS welding position are not stressed, thereby improving the safety of the battery pack.

[0038] When the battery short circuit reaches the burst pressure, the pressure can be released from the sealing ring between the pole post and the cover plate, thereby realizing the function of the explosion-proof valve.

[0039] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some technical features, as long as they are within the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. made within the scope of the present application shall be included in the protection scope of the present application.

Claims

1. An electrode post, characterized in that, It includes a pole head and a pole body. The lower surface of the pole head is connected to the upper surface of the pole body. Two holes are provided on the side of the pole body, and positioning balls are embedded in the two holes. The two positioning balls are connected by a spring.

2. The pole post as described in claim 1, characterized in that, The positioning ball is a steel ball.

3. The pole post as described in claim 1, characterized in that, The distance between the two holes is less than the diameter of the pole body.

4. The pole post as described in claim 1, characterized in that, The pole post has an annular groove near its lower end, and a sealing ring is fitted onto the annular groove.

5. The pole post as described in claim 4, characterized in that, The sealing ring is made of rubber.

6. A battery, characterized in that, Includes a cover plate and the pole as described in any one of claims 1-5.

7. A battery as described in claim 6, characterized in that, The cover plate is cylindrical with a circular through hole in the middle. The pole passes through the upper and lower surfaces of the cover plate through the circular through hole.

8. A battery as described in claim 6, characterized in that, The head of the pole protrudes above the upper surface of the cover plate, and the bottom of the pole body is at the same level as the bottom of the cover plate.

9. A battery as described in claim 6, characterized in that, The diameter of the pole head is larger than the diameter of the circular through hole, and the diameter of the pole body is smaller than the diameter of the circular through hole.

10. A battery as described in claim 6, characterized in that, The inner side of the cover plate is provided with an inner groove that is adapted to the positioning ball. After the cover plate and the pole are combined, the positioning ball is located in the inner groove.

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