Lithium battery pack

Abstract

The utility model discloses a lithium battery pack in the field of lithium batteries, which comprises a support body and a plurality of fixed lithium battery monomers arranged in the support body, the support body consists of an upper panel, a lower panel and a plurality of support rods, and the support rods are connected between the upper panel and the lower panel and are locked and fixed; the upper panel and the lower panel are provided with through holes which are in one-to-one correspondence and are used for inserting lithium battery monomers, nickel sheets are tightly attached to the bottom of the upper panel and the surface of the lower panel, and the nickel sheets are provided with conductive parts covering the through holes and connecting parts connecting the two adjacent conductive parts; the middle part of the conductive part arranged at one end of the upper panel is provided with a positive electrode connecting part which protrudes upwards through the through hole and covers one end of the positive electrode of the single lithium battery; and the middle part of the conductive part arranged at one end of the lower panel is provided with a negative electrode connecting part which protrudes downwards through the through hole and covers one end of the negative electrode of the single lithium battery. The nickel sheets are assembled at the two ends of the bracket body, are clamped at the two ends of the lithium battery monomers and are in direct contact for electric conduction, and the lithium battery monomers and the nickel sheets can be in electric conduction without welding fixation.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, and specifically relates to a lithium battery pack. Background Art

[0002] A lithium battery pack is an integral whole composed of multiple lithium battery monomers, and is widely used in fields such as electric vehicles, electric bicycles, and solar energy storage systems to provide stable power for these devices.

[0003] Currently, after multiple lithium battery monomers are assembled in a lithium battery pack, nickel sheets are simultaneously welded and fixed at both the positive and negative ends of the lithium battery monomers for use as the positive and negative power supplies. However, after the lithium battery monomers are welded and fixed in this way, the lithium battery monomers cannot be taken out. When users need to replace some lithium battery monomers in the lithium battery pack, it becomes extremely difficult. Content of the Utility Model

[0004] In order to overcome the deficiencies of the prior art solutions, the utility model provides a lithium battery pack, which can effectively solve the technical problem that the lithium battery monomers in the current lithium battery pack cannot be replaced after being welded.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] A lithium battery pack includes a bracket body and multiple lithium battery monomers fixedly arranged inside the bracket body. The bracket body is composed of an upper panel, a lower panel, and several support rods. The support rods are connected between the upper panel and the lower panel and are locked and fixed;

[0007] The upper panel and the lower panel are both provided with through holes that correspond to each other and are used for inserting the lithium battery monomers. Nickel sheets are closely attached to the bottom of the upper panel and the surface of the lower panel. The nickel sheets are provided with conductive parts covering the through holes and connecting parts connecting adjacent two conductive parts;

[0008] In the middle of the conductive part arranged at one end of the upper panel, there is a positive connection part that protrudes upward through the through hole and covers the positive end of the lithium battery monomer. In the middle of the conductive part arranged at one end of the lower panel, there is a negative connection part that protrudes downward through the through hole and covers the negative end of the lithium battery monomer.

[0009] Furthermore, the positions of the upper panel and the lower panel where the support rods are inserted are provided with protruding parts, and the surfaces of the protruding parts are provided with slots for inserting and fixing the support rods.

[0010] Furthermore, the support rods and the slots have a matching polygonal structure.

[0011] Furthermore, the upper panel and the lower panel are both provided with assembly grooves for placing the nickel sheets, and the through holes are opened in the assembly grooves.

[0012] Furthermore, the upper panel and the lower panel are both provided with holes for inserting and extending nickel sheets outward.

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

[0014] In the support body of the present utility model, nickel sheets are respectively sleeved on the positive and negative electrodes of all lithium battery monomers. The nickel sheets are provided with a positive electrode connecting part and a negative electrode connecting part that clamp the lithium battery monomers and are in direct contact for conducting electricity. At this time, all the lithium battery monomers can conduct electricity without being welded and fixed to the nickel sheets at both ends, which facilitates the replacement and maintenance of the lithium battery monomers inside the lithium battery pack in the later stage. Description of the Drawings

[0015] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0016] Figure 2 is a schematic diagram of the structure of the upper panel of an embodiment of the present utility model when assembling nickel sheets;

[0017] Figure 3 is a schematic diagram of the structure of the lower panel of an embodiment of the present utility model when assembling nickel sheets;

[0018] Figure 4 is a schematic diagram of the structure of the upper panel or the lower panel of an embodiment of the present utility model;

[0019] Reference Numerals in the Drawings:

[0020] 2 - Lithium Battery Monomer;

[0021] 101 - Upper Panel, 102 - Lower Panel, 103 - Support Rod, 104 - Through Hole, 105 - Protruding Portion, 106 - Slot, 107 - Assembly Groove, 108 - Hole Position;

[0022] 301 - Conductive Portion, 302 - Connecting Portion, 303 - Positive Electrode Connecting Part, 304 - Negative Electrode Connecting Part. Detailed Embodiment

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] As Figures 1-4As shown in the figure, the present utility model provides a lithium battery pack, which is mainly used for lithium battery supply. Its specific structure mainly includes a support body and six lithium battery monomers 2 fixed inside the support body. The six lithium battery monomers 2 are distributed in the same direction, and nickel sheets are provided at both the positive and negative ends of the six lithium battery monomers 2 for common connection, which are used as the positive and negative power connections of the battery pack.

[0025] The support body is composed of an upper panel 101, a lower panel 102, and four support rods 103. The support rods 103 are connected and locked at the four corners between the upper panel 101 and the lower panel 102, and it is a detachable structure. When connecting, raised portions 105 are provided at the positions where the support rods 103 are inserted into the upper panel 101 and the lower panel 102. The support rods 103 are inserted and fixed through the slots 106 on the surface of the raised portions 105. In order to strengthen the fixing of the support rods 103 after insertion into the slots 106 and prevent the support rods 103 from rotating and loosening after insertion, in terms of structure, the support rods 103 and the slots 106 are hexagonal structures that match each other.

[0026] The upper panel 101 and the lower panel 102 are both provided with through holes 104 that correspond one by one and are used for inserting and placing the lithium battery monomers 2. That is to say, the lithium battery monomers 2 can move within the through holes 104 of the upper panel 101 and the lower panel 102. When the lithium battery monomers 2 are fixed, the upper panel 101 is fixed on the outside of the upper part of the lithium battery monomers 2, and the lower panel 102 is fixed on the outside of the lower part of the lithium battery monomers 2. At this time, there is still a gap for the lithium battery monomers 2 within the through holes 101.

[0027] A nickel sheet that is in close contact with the positive electrodes of all the lithium battery monomers 2 is provided at the bottom of the upper panel 101. This nickel sheet is used as the positive electrode of the lithium battery pack, and there is no need for welding fixation between it and the positive electrodes of the lithium battery monomers 2, which is convenient for the replacement and maintenance of the lithium battery monomers 2 inside the lithium battery pack in the later stage. The nickel sheet is provided with six distributed conductive parts 301 that cover the through holes 104 of the upper panel 101, and an abutting part 302 is connected between adjacent two conductive parts 301 for common conduction. At the same time, a positive electrode connection part 303 with the same shape as the positive electrode of the lithium battery monomer 2 is stamped on the surface of the conductive part 301. The positive electrode connection part 303 is pushed out upward through the through hole 104 and can be directly sleeved on one end of the positive electrode of the lithium battery monomer 2 for direct conduction.

[0028] In the same way, a nickel sheet connected to the negative electrodes of all lithium battery cells 2 is closely attached to the surface of the lower panel 102. The nickel sheet is used as the negative electrode of the lithium battery pack, and does not need to be welded to the negative electrode of the lithium battery cell 2, which is convenient for the replacement and maintenance of the lithium battery cells 2 inside the lithium battery pack in the future. The nickel sheet is provided with six conductive parts 301 distributed and covering the through holes 104 of the lower panel 102, and a connecting part 302 is connected between two adjacent conductive parts 301 for common conduction. At the same time, a negative electrode connecting part 304 with the same shape as the negative electrode of the lithium battery cell 2 is stamped out on the surface of the conductive part 301 by stamping. The negative electrode connecting part 304 is pushed downward through the through hole 104 and can be directly put on one end of the negative electrode of the lithium battery cell 2 to directly conduct electricity.

[0029] In addition, no matter whether the conductive part 301 of the nickel sheet covers the through hole 104 on the surface of the upper panel 101 or covers the through hole 104 on the surface of the lower panel 102, the outer diameter of the conductive part 301 is larger than the inner diameter of the through hole 104, and the outer side surfaces of the positive electrode connecting part 303 and the negative electrode connecting part 304 after stamping are in contact with the inner wall of the opening of the through hole 104. At this time, the stamped positive electrode connecting part 303 and the negative electrode connecting part 304 just fill the gap between the lithium battery cell 2 and the through hole 104.

[0030] In order to further fix the position of the nickel sheet in the upper panel 101 and the lower panel 102, both the upper panel 101 and the lower panel 102 are provided with an assembly groove 107 for placing the nickel sheet, and the nickel sheet is clamped and fixed in the assembly groove 107. At the same time, the position of the through hole 104 is set in the assembly groove 107.

[0031] As the nickel sheet on the upper panel 101 is simultaneously connected to the positive electrodes of all lithium battery cells 2, the nickel sheet on the lower panel 102 is simultaneously connected to the negative electrodes of all lithium battery cells 2. In order to allow the nickel sheet to extend outward better for convenient power supply, the upper panel 101 and the lower panel 102 are both provided with holes 108 for inserting and extending the nickel sheet outward.

[0032] Compared with the traditional technology, the technical solution of this invention is equipped with nickel sheets on the bracket body 2, which are respectively covered on the positive and negative electrodes of all the lithium battery cells 2. The nickel sheets are provided with positive electrode connecting parts 303 and negative electrode connecting parts 304 that are clamped on the lithium battery cells 2 and directly contact the conductive ones. At this time, all the lithium battery cells 2 and the nickel sheets at both ends can be conductive without welding and fixing, which is convenient for the later replacement and maintenance of the lithium battery cells 2 inside the lithium battery pack.

[0033] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model, and any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A lithium battery pack, comprising a bracket body and a plurality of lithium battery monomers fixedly arranged inside the bracket body, characterized in that: The bracket body is composed of an upper panel, a lower panel and a plurality of support rods, and the support rods are connected between the upper panel and the lower panel and locked and fixed; The upper panel and the lower panel are both provided with through holes that correspond to each other and are used for inserting lithium battery monomers. Nickel sheets are closely attached to the bottom of the upper panel and the surface of the lower panel. The nickel sheets are provided with a conductive part covering the through holes and a connecting part connecting adjacent two conductive parts; In the middle of the conductive part provided at one end of the upper panel, there is a positive electrode connecting part that protrudes upward through the through hole and covers one end of the positive electrode of the lithium battery monomer. In the middle of the conductive part provided at one end of the lower panel, there is a negative electrode connecting part that protrudes downward through the through hole and covers one end of the negative electrode of the lithium battery monomer.

2. The lithium battery pack according to claim 1, characterized in that: The positions of the upper panel and the lower panel where the support rods are inserted are provided with protruding parts, and the surfaces of the protruding parts are provided with slots for inserting and fixing the support rods.

3. A lithium battery pack according to claim 2, characterized in that: The support rods and the slots have a matching polygonal structure.

4. A lithium battery pack according to claim 1, characterized in that: The upper panel and the lower panel are both provided with assembly grooves for placing nickel sheets, and the through holes are opened in the assembly grooves.

5. A lithium battery pack according to any one of claims 1-4, characterized in that: The upper panel and the lower panel are both provided with holes for inserting and extending the nickel sheets outward.

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