Current balance output mounting structure of lithium iron phosphate battery

Abstract

The utility model discloses a current balance output mounting structure of a lithium iron phosphate battery, which is characterized in that the battery is mounted in a cabinet body of a battery cabinet, an anode conducting bar and a cathode conducting bar are respectively mounted on two sides in the cabinet body, and the anode conducting bar and the cathode conducting bar have the same size specification and are respectively provided with an upper wiring part and a lower wiring part; the upper wiring part and the lower wiring part are respectively provided with a connector lug, and each battery is connected to the corresponding connector lug by adopting a cable with the same length and impedance. Therefore, the lithium iron phosphate batteries are connected and gathered in a manner of balancing current through the copper bars, so that the voltage drop from each lithium iron phosphate battery to the communication power supply is kept consistent, the problem of unbalanced charge and discharge current between the batteries is effectively solved, and the service life of the batteries is prolonged. The copper bar for realizing the current balance output of the lithium iron phosphate battery adopts a sectional design, so that the space of a battery cabinet can be effectively saved while the current transmission performance of the battery pack is met, the number of cables in the cabinet is reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of energy equipment, in particular to an installation structure for realizing balanced current output of lithium iron phosphate batteries in a cabinet. Background Art

[0002] In practical applications of battery cabinets using lithium iron phosphate battery packs, due to the inconsistent voltage drops from each lithium iron phosphate battery to the communication power supply, the charging and discharging currents among the lithium iron phosphate batteries in the battery pack are unbalanced. The traditional connection between the lithium iron phosphate battery pack and the communication power supply is through cable connection or cables are aggregated to the top of the battery cabinet and then connected to the power supply, which results in unbalanced charging and discharging currents among the lithium iron phosphate batteries. At the same time, there are also problems such as excessive use of cables, overly complicated wiring, and poor heat dissipation performance. For the problem of unbalanced charging and discharging currents, currently, it is mostly solved by optimizing the design of the circuit structure, but the optimization of the circuit is extremely difficult and will significantly increase the cost. Content of the Utility Model

[0003] Aiming at the defects of the prior art, the utility model provides an installation structure for balanced current output of lithium iron phosphate batteries, which has a simpler structure, more reasonable design, lower cost, and can simplify the wiring design.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions: An installation structure for balanced current output of lithium iron phosphate batteries, where the batteries are installed inside the cabinet of the battery cabinet. It is characterized in that: a positive conductive bar and a negative conductive bar are respectively installed on both sides inside the cabinet. The positive conductive bar and the negative conductive bar have the same size specifications and both have an upper wiring part and a lower wiring part; a number of wiring heads are respectively arranged on the upper wiring part and the lower wiring part, and each battery is connected to the corresponding wiring head by cables with the same length and impedance.

[0005] Further, both the positive conductive bar and the negative conductive bar are made of copper bars. Each copper bar is installed vertically at a position close to both sides of the battery. The upper batteries are connected to the wiring heads of the upper wiring part, and the lower batteries are connected to the wiring heads of the lower wiring part.

[0006] Further, each copper bar is divided into upper and lower sections, namely the positive upper copper bar, the positive lower copper bar, the negative upper copper bar, and the negative lower copper bar. Each section of the copper bar can transmit a current of not less than 300A; the positive upper copper bar and the positive lower copper bar are installed on the left side of the cabinet, and the negative upper copper bar and the negative lower copper bar are installed on the right side of the cabinet.

[0007] Further, access seats are arranged at the middle positions on the left and right sides inside the cabinet. The opposite ends of the positive upper copper bar and the positive lower copper bar and the opposite ends of the negative upper copper bar and the negative lower copper bar are respectively fixed on the access seats by screws to respectively form complete positive and negative conductive bars.

[0008] Further, the upper copper busbar of the positive electrode, the lower copper busbar of the positive electrode, the upper copper busbar of the negative electrode, and the lower copper busbar of the negative electrode are respectively installed on the inner side wall of the cabinet body through the support of a plurality of support columns.

[0009] Further, the positive electrode of the upper battery is connected to the terminal of the upper connection part of the upper copper busbar of the positive electrode, and the positive electrode of the lower battery is connected to the terminal of the lower connection part of the lower copper busbar of the positive electrode; the negative electrode of the upper battery is connected to the terminal of the upper connection part of the upper copper busbar of the negative electrode, and the negative electrode of the lower battery is connected to the terminal of the lower connection part of the lower copper busbar of the negative electrode.

[0010] The utility model connects and aggregates lithium iron phosphate batteries by means of balancing current through copper busbars, so that the voltage drop of each lithium iron phosphate battery to the communication power supply is kept consistent, effectively solving the problem of unbalanced charge and discharge currents between batteries in the battery pack and improving the battery service life. The copper busbar for realizing the balanced output of the current of the lithium iron phosphate battery is of a segmented design, which can effectively save the space of the battery cabinet, reduce the number of cables inside the cabinet and lower the material production cost while meeting the current transmission performance of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0012] Figure 2 is a schematic diagram of the overall structure of the utility model from another angle;

[0013] Figure 3 is Figure 1 a schematic diagram of the copper busbar assembly structure shown.

[0014] In the figure, 1 is the cabinet body, 2 is the battery, 31 is the upper copper busbar of the positive electrode, 32 is the lower copper busbar of the positive electrode, 33 is the upper copper busbar of the negative electrode, 34 is the lower copper busbar of the negative electrode, 35 is the upper connection part, 36 is the lower connection part, 4 is the access seat, 5 is the support column, and 6 is the terminal. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] In this embodiment, referring to Figures 1 - 3 , for the installation structure of the balanced output of the current of the lithium iron phosphate battery, the battery 2 is installed in the cabinet body 1 of the battery cabinet. On both sides inside the cabinet body 1, a positive electrode conductive busbar and a negative electrode conductive busbar are respectively installed. The positive electrode conductive busbar and the negative electrode conductive busbar have the same size specifications and both have an upper connection part 35 and a lower connection part 36. An anti-fooling structure can also be designed, and the positive electrode and the negative electrode of the conductive busbar can be switched and used according to the actual situation; a plurality of terminals 6 are respectively arranged on the upper connection part 35 and the lower connection part 36. Each battery 2 is connected to the corresponding terminal 6 by using cables with the same length and impedance to balance the voltage drop between the battery packs and effectively improve the battery service life.

[0016] Both the positive electrode busbar and the negative electrode busbar are made of copper bars. Each copper bar is installed vertically on both sides close to the battery 2. The upper battery 2 is connected to the terminal 6 of the upper wiring part 35, and the lower battery 2 is connected to the terminal 6 of the lower wiring part 36.

[0017] Each copper bar is divided into upper and lower sections, namely the positive upper copper bar 31, the positive lower copper bar 32, the negative upper copper bar 33, and the negative lower copper bar 34. Each section of the copper bar can transmit a current of not less than 300A. The current is aggregated in the middle and then connected to the communication power supply. The maximum current connected to the battery cabinet can reach 600A, which not only maximally increases the available space of the cabinet but also takes into account the current transmission performance of the lithium iron phosphate battery. The positive upper copper bar 31 and the positive lower copper bar 32 are installed on the left side of the cabinet body 1, and the negative upper copper bar 33 and the negative lower copper bar 34 are installed on the right side of the cabinet body 1.

[0018] Access seats 4 are arranged in the middle positions on both the left and right sides inside the cabinet body 1. One end of the positive upper copper bar 31 and the positive lower copper bar 32 that face each other, and one end of the negative upper copper bar 33 and the negative lower copper bar 34 that face each other are respectively fixed to the access seats 4 by screws to form complete positive and negative electrode busbars respectively.

[0019] The positive upper copper bar 31, the positive lower copper bar 32, the negative upper copper bar 33, and the negative lower copper bar 34 are respectively supported and installed on the inner side walls of the cabinet body 1 by a number of support columns 5.

[0020] The positive electrode of the upper battery 2 is connected to the terminal 6 of the upper wiring part 35 of the positive upper copper bar 31, and the positive electrode of the lower battery 2 is connected to the terminal 6 of the lower wiring part 36 of the positive lower copper bar 32; the negative electrode of the upper battery 2 is connected to the terminal 6 of the upper wiring part 35 of the negative upper copper bar 33, and the negative electrode of the lower battery 2 is connected to the terminal 6 of the lower wiring part 36 of the negative lower copper bar 34.

[0021] The above has made a detailed description of the present utility model. The above description is only the preferred embodiment of the present utility model, and it cannot limit the scope of implementation of the present utility model. That is, all equivalent changes and modifications made according to the scope of this application should still fall within the scope covered by the present utility model.

Claims

1. An installation structure for balanced current output of a lithium iron phosphate battery, where the battery is installed inside the cabinet of a battery cabinet, and it is characterized in that: A positive conductive busbar and a negative conductive busbar are respectively installed on both sides inside the cabinet body. The positive conductive busbar and the negative conductive busbar have the same size specifications and both have an upper wiring part and a lower wiring part. A number of wiring heads are respectively arranged on the upper wiring part and the lower wiring part, and each battery is connected to the corresponding wiring head by a cable with the same length and impedance.

2. The current balance output installation structure of the lithium iron phosphate battery according to claim 1, characterized in that: Both the positive conductive busbar and the negative conductive busbar are made of copper bars. Each copper bar is installed vertically at a position close to both sides of the battery. The upper battery is connected to the wiring head of the upper wiring part, and the lower battery is connected to the wiring head of the lower wiring part.

3. The current balance output installation structure of the lithium iron phosphate battery according to claim 2, characterized in that: Each copper bar is divided into upper and lower sections, namely the upper positive copper bar, the lower positive copper bar, the upper negative copper bar and the lower negative copper bar. Each section of the copper bar can transmit a current of not less than 300A. The upper positive copper bar and the lower positive copper bar are installed on the left side of the cabinet body, and the upper negative copper bar and the lower negative copper bar are installed on the right side of the cabinet body.

4. The current balance output installation structure of the lithium iron phosphate battery according to claim 3, wherein: Access seats are arranged at the middle positions on the left and right sides inside the cabinet body. One end of the upper positive copper bar and the lower positive copper bar facing each other and one end of the upper negative copper bar and the lower negative copper bar facing each other are respectively fixed on the access seats by screws to respectively form a complete positive conductive busbar and a negative conductive busbar.

5. The current balance output installation structure of the lithium iron phosphate battery according to claim 3, wherein: The upper positive copper bar, the lower positive copper bar, the upper negative copper bar and the lower negative copper bar are respectively installed on the inner side wall of the cabinet body through the support of a number of support columns.

6. The current balance output installation structure of the lithium iron phosphate battery according to claim 3, wherein: The positive electrode of the upper battery is connected to the wiring head of the upper wiring part of the upper positive copper bar, and the positive electrode of the lower battery is connected to the wiring head of the lower wiring part of the lower positive copper bar. The negative electrode of the upper battery is connected to the wiring head of the upper wiring part of the upper negative copper bar, and the negative electrode of the lower battery is connected to the wiring head of the lower wiring part of the lower negative copper bar.

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