Low-voltage stacked battery module capable of balancing charging and discharging and low-voltage stacked structure of low-voltage stacked battery module

Abstract

The utility model discloses a low-voltage stacked battery module capable of balancing charging and discharging, which comprises at least two power storage modules and a control module for charging and discharging, the positive electrode of the control module is respectively connected with the positive electrodes of the power storage modules, the negative electrode of the control module is respectively connected with the negative electrodes of the power storage modules, and the plurality of power storage modules are mutually connected in parallel; according to the utility model, the low-voltage stack structure is arranged in the battery module, so that the problem of overlarge deviation of charge and discharge current between the battery modules is solved, charge and discharge can be balanced, and the current between batteries can be balanced by changing the connection path of the positive electrode and the negative electrode. The positive electrode and the negative electrode of the upper module and the negative electrode of the lower module of the battery are connected in parallel, and the added middle channel is directly connected up and down.

Description

Technical Field

[0001] The utility model relates to the technical field of storage batteries, in particular to a low-voltage stacked battery module for balanced charge and discharge and its low-voltage stacking structure. Background Art

[0002] As Figure 1 shown, currently, low-voltage stacked batteries are generally connected in a parallel stacking manner. The connection between traditional low-voltage stacked battery modules is through the upper and lower positive and negative connections. The positive and negative poles of the topmost module are led out to the control box for charge and discharge. A control box is added on the top to aggregate the batteries and supply power to the outside. Since there is internal resistance in the connection between battery modules, during the charge and discharge process, the current distribution of the batteries will be unbalanced due to the internal resistance. The current near the control box is large, and the current far from the control box is small. Over time, the power deviation between battery modules will be relatively large, thus affecting the use of the batteries.

[0003] Because the line near the control box is relatively shorter, with smaller resistance and larger current, and power is proportional to current, the batteries near the control box will consume faster; therefore, time will affect the battery life. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a low-voltage stacked battery module for balanced charge and discharge and its low-voltage stacking structure to overcome the deficiencies in the prior art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A low-voltage stacked battery module for balanced charge and discharge includes at least two energy storage modules and a control module for charge and discharge. The positive poles of the control module are respectively connected to the positive poles of the energy storage modules, and the negative poles of the control module are respectively connected to the negative poles of the energy storage modules. Multiple energy storage modules are connected in parallel with each other.

[0007] A low-voltage stacking structure applying the above low-voltage stacked battery module includes a control box, a base, and an energy storage cabinet. The energy storage cabinet is fixedly arranged on the top of the base, the control box is fixedly arranged on the top of the energy storage cabinet, and multiple storage batteries are fixedly arranged in the energy storage cabinet; the control box is electrically connected with a first wire, the base is provided with a conducting member, the first wire is electrically connected with the conducting member, a second wire is led out from the storage battery arranged far from the control box in the energy storage cabinet and electrically connected with the conducting member, and the first wire is electrically connected with the second wire through the conducting member.

[0008] Further elaborating, an intermediate channel is arranged in a penetrating manner inside the energy storage cabinet, the inside of the control box is communicated with the base through the intermediate channel, and the first wire is arranged in the intermediate channel.

[0009] Further elaborating, multiple adjacent storage batteries are connected in parallel.

[0010] Further elaboration is as follows. The positive electrode of the control box is electrically connected to the positive electrode of the storage battery arranged away from the control box.

[0011] In another embodiment, the negative electrode of the control box is electrically connected to the negative electrode of the storage battery arranged away from the control box.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] The present utility model is provided with a low-voltage stacked structure design in the battery module, thereby solving the problem of excessive deviation of the charge and discharge current between battery modules. It can balance the charge and discharge by changing the connection path of the positive and negative electrodes to balance the current between the batteries. It changes from the original one positive and one negative to one positive, one negative, and one middle with three channels. The positive and negative electrodes of the upper and lower modules of the battery are connected in parallel, and the added middle channel is directly connected up and down. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the wiring diagram of the traditional structure;

[0015] Figure 2 is the circuit layout diagram of the low-voltage stacked battery module of the present utility model;

[0016] Figure 3 is the perspective view of the present utility model;

[0017] Figure 4 is the schematic diagram of the internal structure of the present utility model.

[0018] Explanation of the reference numerals in the drawings:

[0019] 1. Middle channel; 2. First wire; 3. Second wire; 4. Storage battery; 5. Base; 6. Control box; 7. Conductive part; 8. Battery storage cabinet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to make the above objects, features, and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model will be made in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. When the number of an element is referred to as having "a plurality of", it can be any number of two or more. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs. The terms used herein in the specification of this utility model are only for the purpose of describing specific implementations and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0023] The following is a detailed description of this utility model in conjunction with the various implementations shown in the accompanying drawings:

[0024] As Figures 2-4 shown, a low-voltage stacked battery module for balanced charge and discharge is provided in this utility model, which includes at least two energy storage modules and a control module for charge and discharge. The positive poles of the control module are respectively connected to the positive poles of the energy storage modules, and the negative poles of the control module are respectively connected to the negative poles of the energy storage modules. The multiple energy storage modules are connected in parallel with each other. Generally speaking, the control module is connected in parallel with each energy storage module respectively, and wires are led out from the control module to be connected to external electrical equipment or a charging power source. Compared with the previous old structure, in the old structure, the energy storage modules are connected in parallel, and then the control module is connected in parallel with one of the energy storage modules. Such a connection method will make the current of the energy storage module arranged far from the control module smaller, and the output current of the energy storage module close to the control module larger. Therefore, in the long run, the power supply or power consumption will be unbalanced, affecting the battery life, while this utility model can solve this technical problem.

[0025] A low-voltage stacked structure applying the above low-voltage stacked battery module includes a control box 6, a base 5 and an energy storage cabinet 8. The energy storage cabinet 8 is fixedly arranged on the top of the base 5, the control box 6 is fixedly arranged on the top of the energy storage cabinet 8, and a plurality of storage batteries 4 are fixedly arranged in the energy storage cabinet 8; the control box 6 is electrically connected with a first wire 2, the base 5 is provided with a conduction member 7, and this conduction member 7 extends through to the bottommost energy storage cabinet. The first wire 2 is electrically connected with the conduction member 7, and a second wire 3 is led out from the storage battery 4 arranged far from the control box 6 in the energy storage cabinet 8 and is electrically connected with the conduction member 7. The first wire 2 is electrically connected with the second wire 3 through the conduction member 7.

[0026] To protect the wires and prevent interference, an intermediate channel 1 is optionally provided in a penetrating manner inside the battery storage cabinet 8. The control box 6 inside the intermediate channel 1 is communicated with the base 5 through the intermediate channel 1. The intermediate channel 1 is a through pipe, and a plurality of laminates are provided inside the battery storage cabinet 8 to separate the respective storage batteries 4, and the laminates fixedly arrange the respective storage batteries 4 in sequence from top to bottom (in the vertical direction) inside the battery storage cabinet 8. The first wire 2 is arranged inside the intermediate channel 1 so that the conducting member 7 in the base 5 can be directly electrically connected to the control box 6.

[0027] In this embodiment, multiple adjacent storage batteries 4 are connected in parallel, and then the positive electrode of the control box 6 is electrically connected to the positive electrode of the storage battery 4 arranged far from the control box 6. For the negative electrode, the negative electrodes of adjacent storage batteries 4 are electrically connected through a wire, and the negative electrode of the storage battery 4 arranged closest to the control box 6 is additionally led out with a wire to be electrically connected to the negative electrode of the control box 6.

[0028] In another embodiment, multiple adjacent storage batteries 4 are connected in parallel, and the negative electrode of the control box 6 is electrically connected to the negative electrode of the storage battery 4 arranged far from the control box 6. For the positive electrode, the positive electrodes of adjacent storage batteries 4 are electrically connected through a wire, and the positive electrode of the storage battery 4 arranged closest to the control box 6 is additionally led out with a wire to be electrically connected to the positive electrode of the control box 6.

[0029] The above embodiments can all balance the storage batteries 4 connected in parallel inside and be connected in parallel with the control box 6 as a whole. Thus, the problem of excessive deviation of the charge and discharge current between battery modules is solved, and the charge and discharge can be balanced by changing the connection path of the positive and negative electrodes to balance the current between the batteries.

[0030] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification. For those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A low-voltage stacked battery module with balanced charge and discharge, characterized in that: It includes at least two power storage modules and a control module for charging and discharging, wherein the positive poles of the control modules are respectively connected to the positive poles of the power storage modules, the negative poles of the control modules are respectively connected to the negative poles of the power storage modules, and the multiple power storage modules are connected in parallel with each other; the positive pole of the control box is electrically connected to the positive pole of a battery arranged away from the control box, or the negative pole of the control box is electrically connected to the negative pole of a battery arranged away from the control box.

2. A low-voltage stacking structure using the low-voltage stacking battery module as claimed in claim 1, comprising a control box, a base and a storage cabinet, wherein the storage cabinet is fixedly arranged on the top of the base, the control box is fixedly arranged on the top of the storage cabinet, and a plurality of storage batteries are fixedly arranged in the storage cabinet; characterized in that: The control box is electrically connected with a first wire, the base is provided with a conducting piece, the first wire is electrically connected to the conducting piece, a second wire is drawn out from a battery arranged away from the control box in the power storage cabinet and is electrically connected to the conducting piece, and the first wire is electrically connected to the second wire through the conducting piece.

3. A low-voltage stacked battery module with balanced charge and discharge as claimed in claim 2, characterized in that: An intermediate channel is provided through the storage cabinet, the interior of the control box is connected with the base through the intermediate channel, and the first wire is arranged in the intermediate channel.

4. A low-voltage stacked battery module with balanced charge and discharge as claimed in claim 2, characterized in that: A plurality of adjacently arranged storage batteries are connected in parallel.

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