Square-shell battery cell

Abstract

The utility model discloses a square shell battery cell which comprises a single battery cell, a first groove is formed in one side of the top end of the single battery cell, a first pole column groove is formed in the first groove, a positive pole column is arranged in the first pole column groove, a second groove is formed in one side, opposite to the first groove, of the top end of the single battery cell, and a third groove is formed in one side, opposite to the second groove, of the top end of the single battery cell. A second terminal post groove is formed in the second groove, and a negative terminal post is arranged in the second terminal post groove; according to the busbar, the pole is arranged in the embedded pole groove, the pole is not prone to being damaged due to collision or friction in the using or transporting process, meanwhile, the space used by arranging the pole in the pole groove is smaller, installation of the busbar can be facilitated by arranging the groove, and therefore the space utilization rate can be increased, and the energy density can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of lithium ion battery especially relates to a square shell electric core. BACKGROUND

[0002] The battery module is the group battery that is composed of a plurality of single batteries and relevant installation structural members etc., and has a plurality of single electric cores that meet the standard battery module structure, and the number and size of the single electric core used by different battery modules are different, and the single electric core is an important part of the battery module.

[0003] In the prior art, the pole of the single electric core is usually exposed, and the pole is easily damaged due to bumping or friction during use or transportation, and the exposed pole needs more space, and the connection and fixation of the busbar are not convenient, thereby reducing the space utilization and the energy density.

[0004] Therefore, the utility model provides a square shell electric core to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model discloses a square shell electric core that solves the problems in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A square shell electric core, comprising a single electric core, a first groove is arranged on one side of the top end of the single electric core, a first pole slot is arranged in the first groove, a positive pole is arranged in the first pole slot, a second groove is arranged on the side of the top end of the single electric core opposite to the first groove, a second pole slot is arranged in the second groove, and a negative pole is arranged in the second pole slot.

[0008] Preferably, the distance between the bottom end face of the first groove and the top end face of the single electric core is 0.1cm-5cm.

[0009] Preferably, the bottom end face of the first groove and the bottom end face of the second groove are located on the same horizontal plane.

[0010] Preferably, the top end face of the positive pole is flush with the bottom end face of the first groove, and the top end face of the negative pole is flush with the bottom end face of the second groove.

[0011] Preferably, a third groove is arranged between the first groove and the second groove, an explosion-proof valve and a liquid injection hole are arranged in the third groove.

[0012] Preferably, the first groove and the second groove are symmetrically arranged with the third groove as the center.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] By placing the electrode post in the embedded electrode post groove, the electrode post is less likely to be damaged by bumps or friction during use or transportation. At the same time, the electrode post uses less space when placed in the electrode post groove, and the groove can facilitate the installation of the busbar, thereby improving space utilization and increasing energy density. Attached Figure Description

[0015] Figure 1 This is an overall structural diagram of a square-shell battery cell proposed in this utility model.

[0016] In the diagram: 1. Single battery cell; 2. First groove; 3. First terminal slot; 4. Positive terminal; 5. Second groove; 6. Second terminal slot; 7. Negative terminal; 8. Third groove; 9. Explosion-proof valve; 10. Liquid injection hole. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Reference Figure 1 A square-shell battery cell includes a single battery cell 1, which is a steel-shell battery cell or an aluminum-shell battery cell. A first groove 2 is provided on one side of the top of the single battery cell 1. A busbar can be placed in the first groove 2 for electrical connection with the terminal post. A first terminal post groove 3 is provided in the first groove 2. A positive terminal post 4 is disposed in the first terminal post groove 3. The positive terminal post 4 is located in the terminal post groove, which can prevent the positive terminal post 4 from being exposed and damaged.

[0019] A second groove 5 is provided on the side of the top of the single cell 1 opposite to the first groove 2. The busbar can be placed in the second groove 5 for electrical connection with the terminal post. A second terminal post groove 6 is provided in the second groove 5. A negative terminal post 7 is provided in the second terminal post groove 6. The negative terminal post 7 is located in the terminal post groove, which can prevent the negative terminal post 7 from being exposed and damaged.

[0020] By placing the electrode post in the embedded electrode post groove, the electrode post is less likely to be damaged by bumps or friction during use or transportation. At the same time, the space used by placing the electrode post in the electrode post groove is less, and the installation of the busbar can be facilitated by setting the first groove 2 and the second groove 5, thereby improving space utilization and increasing energy density.

[0021] The distance between the bottom surface of the first groove 2 and the second groove 5 and the top surface of the single cell 1 is 0.1cm-5cm, so that the busbar can be placed in the embedded first groove 2 and the second groove 5, which can save space, improve space utilization, and thus improve energy density.

[0022] The first groove 2 and the second groove 5 are symmetrically arranged with the third groove 8 as the center. The bottom surfaces of the first groove 2 and the second groove 5 are located on the same horizontal plane, which can maintain the balance of the battery cells and facilitate mass production. At the same time, after the busbar is installed to form a battery module, the individual battery cells 1 in the battery module can also be arranged neatly.

[0023] The top surface of the positive terminal 4 is flush with the bottom surface of the first groove 2, and the top surface of the negative terminal 7 is flush with the bottom surface of the second groove 5. Therefore, the terminals are not easily damaged by bumps or friction during use or transportation, and can be connected to the busbar.

[0024] A third groove 8 is provided between the first groove 2 and the second groove 5. The third groove 8 is equipped with an explosion-proof valve 9 and an injection hole 10. When the gas pressure inside the single cell 1 is too high, the generated gas will break through the explosion-proof valve 9 to prevent the cell from exploding. At the same time, after the core inside the single cell 1 is installed, the fast liquid is injected into the electrolyte through the injection hole 10. The third groove 8 can prevent the electrolyte from splashing onto the positive electrode post 4 and the negative electrode post 7 during the injection process, and can protect the positive electrode post 4 and the negative electrode post 7.

Claims

1. A prismatic battery cell, comprising a single battery cell, characterized in that, The top of the single cell is provided with a first groove, and a first electrode slot is provided in the first groove. The positive electrode is provided in the first electrode slot. The top of the single cell is provided with a second groove on the side opposite to the first groove. The second groove is provided with a second electrode slot, and the second electrode slot is provided with a negative electrode.

2. The prismatic battery cell according to claim 1, characterized in that, The distance between the bottom surface of the first groove and the second groove and the top surface of the single cell is 0.1cm-0.5cm.

3. A prismatic battery cell according to claim 1, characterized in that, The bottom surface of the first groove and the bottom surface of the second groove are located on the same horizontal plane.

4. A prismatic battery cell according to claim 1, characterized in that, The top surface of the positive electrode post is flush with the bottom surface of the first groove, and the top surface of the negative electrode post is flush with the bottom surface of the second groove.

5. A prismatic battery cell according to claim 1, characterized in that, A third groove is provided between the first groove and the second groove, and an explosion-proof valve and a liquid injection hole are provided in the third groove.

6. A prismatic battery cell according to claim 1, characterized in that, The first groove and the second groove are symmetrically arranged with the third groove as the center.

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