Lithium ion power battery for low-speed vehicle

Abstract

The utility model belongs to the technical field of lithium battery production, and relates to a lithium ion power battery for a low-speed vehicle, which comprises a battery cover, a battery jar, a plurality of lithium ion battery cells, a bottom plate, a battery cell bracket, a battery protection plate, a connecting bar, an acquisition line and an insulating plate, the bottom plate is connected in the battery jar through a bolt I, a connecting row is arranged at the top of the upper bracket, all the lithium ion battery cells are welded through the connecting row to form a battery cell module, the battery cell module is adhered to the bottom plate through structural adhesive, the insulating plate is arranged above the connecting row, the battery cover is arranged above the insulating plate, and the battery cover is connected above the battery jar in a sealing manner through a bolt II; the battery cover is provided with an anode wiring terminal, a cathode wiring terminal and a safety valve, and the battery cell module is electrically connected with the battery protection plate through an acquisition line. The utility model has the advantages of more reasonable structural design and more convenience in assembly, and is favorable for improving the overall safety and stability of the battery.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery production, and specifically relates to a lithium ion power battery for low-speed vehicles. Background Art

[0002] Currently, the power batteries used in low-speed vehicles are mostly 5 12V lead-acid battery packs connected in series. Lead-acid batteries have problems caused by defects in their material system, such as low specific energy, heavy weight, large volume, low power discharge performance, and short life. Therefore, lithium-ion batteries that can replace lead-acid battery packs and have better performance have come into being.

[0003] However, in the prior art, lithium-ion batteries have certain design defects, which make assembly inconvenient, and the overall safety and stability of the battery still need to be further improved. Utility Model Content

[0004] The purpose of this utility model is to solve the above technical problems, and its technical solution is:

[0005] A lithium-ion power battery for low-speed vehicles comprises a battery cover, a battery tank, a plurality of lithium-ion cells, a bottom plate, a cell support, a battery protection plate, a connection row, a collection line and an insulating plate, wherein the cell support comprises an upper support and a lower support, wherein the upper support and the lower support are respectively provided with limit holes matching the upper and lower ends of each lithium-ion cell, wherein the lower support is connected to the bottom plate, the battery protection plate is arranged on one side of the lower support and fixed to the bottom plate, wherein the bottom plate is connected to the battery tank by bolt 1, a connection row is arranged on the top of the upper support, wherein each lithium-ion cell is welded through the connection row to form a cell module, wherein the cell module is bonded to the bottom plate by structural adhesive, wherein the insulating plate is arranged above the connection row, wherein the battery cover is arranged above the insulating plate, and the battery cover is sealed and connected to the top of the battery tank by bolt 2, and wherein the battery cover is provided with a positive electrode terminal, a negative electrode terminal and a safety valve, wherein the cell module is electrically connected to the battery protection plate by the collection line, and wherein the positive electrode terminal and the negative electrode terminal are electrically connected to the positive electrode interface and the negative electrode interface of the battery protection plate respectively.

[0006] Preferably, the battery protection board is provided with an overvoltage protection circuit, a low voltage protection circuit, an overcurrent protection circuit, an overheat protection circuit and an intelligent balancing circuit, which can effectively ensure the consistency and safety of the battery during the charging and discharging process.

[0007] Preferably, the safety valve adopts an M10 water-blocking and breathable valve to ensure the balance of pressure inside and outside the battery and improve the safety of the battery.

[0008] Preferably, a handle is hinged on the top of the battery cover to facilitate overall transportation of the battery.

[0009] The utility model also includes other components that enable a lithium-ion power battery for a low-speed vehicle to be used normally, which are all conventional means in the field. In addition, devices or components not limited in the utility model, such as a battery protection board and an overvoltage protection circuit, a low voltage protection circuit, an overcurrent protection circuit, an overheating protection circuit and an intelligent balancing circuit on the battery protection board, all adopt the existing technology in the field.

[0010] The working principle of the utility model is that each lithium-ion battery cell is supported and limited by an upper bracket and a lower bracket, spliced ​​and fixed by a connecting row, and then bonded to the bottom plate by a structural adhesive, thereby improving the stability of the battery cell module; after the positive terminal, the negative terminal and the safety valve are installed on the battery cover, an insulating plate is posted on its inner side for insulation treatment, and the battery protection plate is provided to further ensure the safety of the battery.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model has a more reasonable structural design, is more convenient to assemble, and helps to improve the overall safety and stability of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model in the embodiment.

[0014] Figure 2 It is a schematic diagram of the partial structure explosion of the utility model in the embodiment.

[0015] Figure 3 It is a schematic diagram of the three-dimensional structure of the lower bracket of the utility model in the embodiment. DETAILED DESCRIPTION

[0016] The technology of the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0017] Example

[0018] like Figure 1-3As shown, a 60V lithium-ion power battery for low-speed vehicles proposed in this embodiment includes a battery cover 1, a battery slot 2, 40 cylindrical lithium-ion cells 3 (cell diameter is 60mm, height is 150mm, nominal voltage is 3.2V), a bottom plate 4, a cell bracket, a battery protection plate 5, a connecting row 6, a collection line (not shown in the figure) and an insulating plate 7, wherein the cell bracket includes an upper bracket 8 and a lower bracket 9, and the upper bracket and the lower bracket are respectively provided with limiting holes 10 matching the upper and lower ends of each lithium-ion cell, the lower bracket is connected to the bottom plate, and the battery protection plate is arranged on one side of the lower bracket and fixed by screws On the bottom plate, the bottom plate is connected to the battery slot by bolt 1, a connecting row is provided on the top of the upper bracket, and each lithium-ion battery cell is welded through the connecting row to form a battery module, and the battery module is bonded to the bottom plate by structural adhesive, the insulating plate is arranged above the connecting row, the battery cover is arranged above the insulating plate, and the battery cover is sealed and connected to the top of the battery slot by bolt 2, and the battery cover is provided with a positive terminal 11, a negative terminal 12 and a safety valve 13, the battery module is electrically connected to the battery protection board through a collection line, and the positive terminal and the negative terminal are electrically connected to the positive interface and the negative interface of the battery protection board respectively.

[0019] In this embodiment, 40 lithium-ion cells are divided into two groups, 20 cells are connected in series as one group, and the two groups are connected in parallel, so that the capacity of the battery reaches 100-105AH and the stability of the battery voltage is guaranteed.

[0020] Specifically, the battery protection board is provided with an overvoltage protection circuit, a low voltage protection circuit, an overcurrent protection circuit, an overheat protection circuit and an intelligent balancing circuit, which can effectively ensure the consistency and safety of the battery during the charging and discharging process. The overvoltage protection circuit, the low voltage protection circuit, the overcurrent protection circuit, the overheat protection circuit and the intelligent balancing circuit in this embodiment all adopt the existing technology in this field, and will not be described here.

[0021] More specifically, the safety valve adopts an M10 water-blocking and breathable valve to ensure that the pressure inside and outside the battery is balanced and improve the safety of the battery. A handle 14 is hinged on the top of the battery cover to facilitate the overall transportation of the battery.

[0022] The working principle of the utility model is that each lithium-ion battery cell is supported and limited by an upper bracket and a lower bracket, spliced ​​and fixed by a connecting row, and then bonded to the bottom plate by a structural adhesive, thereby improving the stability of the battery cell module; after the positive terminal, the negative terminal and the safety valve are installed on the battery cover, an insulating plate is posted on its inner side for insulation treatment, and the battery protection plate is provided to further ensure the safety of the battery.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lithium-ion power battery for low-speed vehicles, comprising a battery cover, a battery tank and a plurality of lithium-ion cells, characterized in that: The invention also includes a bottom plate, a battery cell bracket, a battery protection plate, a connecting row, a collection line and an insulating plate. The battery cell bracket includes an upper bracket and a lower bracket. The upper bracket and the lower bracket are respectively provided with limiting holes matching the upper and lower ends of each lithium-ion battery cell. The lower bracket is connected to the bottom plate. The battery protection plate is arranged on one side of the lower bracket and fixed to the bottom plate. The bottom plate is connected to the battery slot by bolt 1. A connecting row is arranged on the top of the upper bracket. Each lithium-ion battery cell is welded through the connecting row to form a battery cell module. The battery cell module is bonded to the bottom plate by structural adhesive. The insulating plate is arranged above the connecting row. The battery cover is arranged above the insulating plate, and the battery cover is sealed and connected to the top of the battery slot by bolt 2. The battery cover is provided with a positive terminal, a negative terminal and a safety valve. The battery cell module is electrically connected to the battery protection board through the collection line. The positive terminal and the negative terminal are electrically connected to the positive interface and the negative interface of the battery protection board respectively.

2. A lithium-ion power battery for low-speed vehicles according to claim 1, characterized in that: The battery protection board is provided with an overvoltage protection circuit, a low voltage protection circuit, an overcurrent protection circuit, an overheat protection circuit and an intelligent balancing circuit.

3. A lithium-ion power battery for low-speed vehicles according to claim 1, characterized in that: The safety valve adopts an M10 water-blocking and breathable valve.

4. A lithium-ion power battery for low-speed vehicles according to claim 1, characterized in that: A handle is hinged on the top of the battery cover.

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