Circuit convenient for replacing abnormal battery cells of series battery pack

Abstract

The utility model discloses a circuit convenient for replacing abnormal battery cells of a series battery pack, which comprises a battery pack, the battery pack comprises a plurality of batteries which are sequentially connected in series, each battery is connected with a DCDC module in parallel, and when the batteries are effectively used, the DCDC modules are no-load and the batteries are damaged, the DCDC modules can be conducted. According to the technical scheme, the bad battery cell can be quickly replaced while the equipment is not powered off, so that the load equipment can continuously run for a long time, a standby UPS system is omitted, and the cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, specifically to a circuit that facilitates the replacement of faulty cells in a series-connected battery pack. Background Technology

[0002] Energy storage systems are systems that store electrical energy through physical or chemical means and release it when needed. They are mainly used to balance electricity supply and demand, improve energy efficiency, and support the integration of renewable energy.

[0003] A UPS system is an emergency power supply device used to provide instantaneous power when the main power supply is interrupted, ensuring the continuous operation of critical equipment (such as servers and medical equipment) and preventing data loss or equipment damage.

[0004] Current energy storage systems, especially UPS systems, use battery packs composed of multiple batteries connected in series. When a battery reaches the end of its lifespan or a cell malfunctions and needs replacement, a power outage is necessary for replacement, or an additional backup UPS system must be added. Replacing the battery with a backup defeats the purpose of the UPS system, while adding an extra backup UPS system increases costs. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a circuit for easily replacing faulty cells in series-connected battery packs. This technical solution supports rapid replacement of faulty cells while ensuring uninterrupted power supply to the equipment, enabling the load equipment to operate continuously for extended periods, eliminating the need for a backup UPS system and saving costs.

[0006] A circuit for replacing faulty cells in a series-connected battery pack includes a battery pack containing multiple batteries connected in series. A DC-DC module is connected in parallel to each battery cell. When the battery is in use, the DC-DC module is unloaded; when the battery is damaged, the DC-DC module can conduct.

[0007] Preferably, the multiple batteries in the battery pack are connected by wires. The positive terminal of the battery pack is connected to the main positive wire, and the negative terminal of the battery pack is connected to the main negative wire. The input terminal of the DC-DC module is connected to the negative branch wire and the positive branch wire. The negative branch wire is connected to the main negative wire, and the positive branch wire is connected to the main positive wire. The output terminal of the DC-DC module is connected to two output wires, which are respectively connected to the wires on both sides of the battery.

[0008] Preferably, the DC-DC module is connected to the control system, and an alarm is connected to the control system. When the DC-DC module is turned on, the control system can control the alarm to sound.

[0009] Preferably, the DC-DC module is a step-down module.

[0010] Preferably, multiple positive branch conductors are connected in parallel.

[0011] Preferably, multiple negative branch conductors are connected in parallel.

[0012] The beneficial effects of this invention are as follows: In this technical solution, a DC-DC module is connected in parallel to each battery cell. When the battery is functional, the DC-DC module is in an unloaded state. When a single battery cell fails, the circuit of that battery is broken, and the corresponding DC-DC module is turned on. The voltage output by this DC-DC module is the total voltage of the battery pack minus the voltage of the failed battery, allowing the remaining batteries to function normally. This allows for rapid replacement of faulty cells without power interruption, enabling the load equipment to operate continuously for extended periods, eliminating the need for a backup UPS system and saving costs. Attached Figure Description

[0013] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0014] Figure 1 This is the circuit diagram of this utility model. Detailed Implementation

[0015] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0016] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0017] Example

[0018] like Figure 1 As shown, this embodiment provides a circuit for replacing faulty cells in a series battery pack, including a battery pack containing multiple batteries connected in series. A DC-DC module is connected in parallel to each battery cell. When the battery is in use, the DC-DC module is unloaded; when the battery is damaged, the DC-DC module can conduct.

[0019] In this embodiment, multiple batteries within the battery pack are connected by wires. The positive terminal of the battery pack is connected to the main positive wire, and the negative terminal is connected to the main negative wire. The input terminal of the DC-DC module is connected to both the negative and positive branch wires. The negative branch wire is connected to the main negative wire, and the positive branch wire is connected to the main positive wire. The output terminal of the DC-DC module is connected to two output wires, which are respectively connected to wires on both sides of the battery. In this embodiment, multiple positive branch wires are connected in parallel. In this embodiment, multiple negative branch wires are connected in parallel.

[0020] In this embodiment, a DC-DC module is connected in parallel to each battery cell by connecting the main positive wire, the main negative wire, the positive branch wire, and the negative branch wire.

[0021] In this embodiment, the DC-DC module is connected to the control system, and an alarm is connected to the control system. When the DC-DC module is turned on, the control system can control the alarm to sound.

[0022] The DC-DC module described in this embodiment is a step-down module.

[0023] The specific working principle is as follows: When the battery is effective, the DC-DC module is in an unloaded state. When a single battery cell fails, the circuit of that battery is broken, and the corresponding DC-DC module is turned on. The voltage output by this DC-DC module is the total voltage of the battery pack minus the voltage of the failed battery. The remaining batteries can be used normally. In this way, the equipment can be powered on without interruption, and the faulty cells can be quickly replaced. This allows the load equipment to run continuously for a long time, eliminating the need for a backup UPS system and saving costs.

[0024] Simultaneously, when the DC-DC module is turned on, it sends information to the control system, which then activates the alarm to prompt the replacement of the battery cell, facilitating timely replacement by staff.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A circuit for easily replacing faulty cells in a series-connected battery pack, characterized in that, The device includes a battery pack containing multiple batteries connected in series. A DC-DC module is connected in parallel to each battery. When the battery is in use, the DC-DC module is unloaded. When the battery is damaged, the DC-DC module can conduct.

2. The circuit for facilitating replacement of faulty cells in a series-connected battery pack according to claim 1, characterized in that, The multiple cells in the battery pack are connected by wires. The positive terminal of the battery pack is connected to the main positive wire, and the negative terminal of the battery pack is connected to the main negative wire. The input terminal of the DC-DC module is connected to the negative branch wire and the positive branch wire. The negative branch wire is connected to the main negative wire, and the positive branch wire is connected to the main positive wire. The output terminal of the DC-DC module is connected to two output wires, which are respectively connected to the wires on both sides of the battery.

3. The circuit for facilitating replacement of faulty cells in a series-connected battery pack according to claim 1, characterized in that, The DC-DC module is connected to the control system, and an alarm is connected to the control system. When the DC-DC module is turned on, the control system can control the alarm to sound.

4. The circuit for facilitating replacement of faulty cells in a series-connected battery pack according to claim 1, characterized in that, The DC-DC module is a step-down module.

5. A circuit for facilitating the replacement of faulty cells in a series-connected battery pack according to claim 2, characterized in that, Multiple positive branch conductors are connected in parallel.

6. The circuit for facilitating replacement of faulty cells in a series-connected battery pack according to claim 2, characterized in that, Multiple negative branch conductors are connected in parallel.

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