Apparatus for equalizing cells in energy storage battery pack
By designing a device that contains a balanced instrument and an over -current protection device, the problem of complexity and current stability of the energy storage system is solved, and the high -efficiency balance and integrated maternal row of the unit in the energy storage battery package in the energy storage battery pack Safety protection.
Patent Information
- Application Number
- PCT/CN2024/081697
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-05-10
- Filing Date
- 2024-03-14
- Publication Date
- 2025-01-30
AI Technical Summary
The active balance method of the existing energy storage system requires the operation of opening the cover, and the balance process is complicated, which consumes manpower, material resources and financial resources. The current stability of the equalizer is uncontrollable, which may lead to abnormal current fluctuations, wrong parameter settings or short-circuits, and Lack of identification and alarm functions, and the integrated busbar cannot be protected.
Design a device, including battery packs, equilibrium instruments, and over -current protection devices. The equilibrium device is connected to the integrated parent interface through the power cord. There is an over -current protection device on the power line, including sound and light alarm modules and fuses. Integrated the mother and report to the police in time.
The efficient and balanced monomer of the energy storage battery packet is achieved, the safety and efficiency of the balanced process are improved, and the current abnormalities and the damage of the integrated maternal row are prevented.
Smart Images
Figure CN2024081697_30012025_PF_FP_ABST
Abstract
Description
A device for balancing cells in an energy storage battery pack
[0001] Cross-references
[0002] This application claims priority to Chinese patent application number 2023211161660, filed on May 10, 2023, entitled “A device for balancing cells in an energy storage battery pack,” the entire text of which is hereby incorporated by reference. Technical Field
[0003] The present application belongs to the technical field of battery balancing equipment, and specifically relates to a device for balancing cells in an energy storage battery pack. Background Art
[0004] The active balancing method for energy storage systems currently on the market involves opening the cover of the energy storage module and then using pressure clamps to balance each cell. This ensures that the charge state of the cells within the battery cluster is close to uniform and reduces the pressure difference within the cluster. However, in actual use scenarios, it is inconvenient to open the cover of the plug-in box on site, and the balancing process is too complicated, consuming manpower, material resources, and financial resources. Although the current of current balancing instruments can be set, the current stability is uncontrollable, which may cause abnormal current fluctuations, incorrect parameter settings, or line short circuits. Current balancing instruments also lack identification and alarm functions and cannot protect the integrated busbar. If the output current of the balancing instrument exceeds the overcurrent limit of the integrated busbar instantaneously or for a short period of time, the integrated busbar is at risk of damage.
[0005] Summary of the Invention
[0006] The purpose of this application is to provide a device for balancing cells in an energy storage battery pack in order to solve the above-mentioned problems.
[0007] To achieve the above-mentioned purpose, the present application adopts the following technical solutions: a device for balancing cells in an energy storage battery pack, comprising a battery pack having a plurality of battery cells and a balancing instrument arranged on one side of the battery pack, wherein the battery cells are all connected to an integrated busbar interface, and the balancing instrument is connected to a plurality of power cords, wherein the power cords are connected to the integrated busbar interface by plugging, and the power cords correspond to and are connected to the battery cells one by one, and an overcurrent protection device is provided on the power cords.
[0008] In the above-mentioned device for balancing cells in an energy storage battery pack, the overcurrent protection device includes an audible and visual alarm module and an overcurrent protection box. A plurality of fuses are provided in the overcurrent protection box. The fuses correspond to power lines one by one and are connected to the power lines, and the two ends of the audible and visual alarm module are respectively connected to the two ends of the fuse.
[0009] In the above-mentioned device for balancing cells in an energy storage battery pack, the sound and light alarm module is a signal indicator light and a buzzer provided on the overcurrent protection box, and the signal indicator light and the buzzer are connected in series at both ends of each fuse.
[0010] In the above-mentioned device for balancing cells in an energy storage battery pack, the power line is divided into a first power line and a second power line, and the fuses are connected in series between the first power line and the second power line.
[0011] In the above-mentioned device for balancing cells in an energy storage battery pack, the number of the first power lines and the number of the second power lines are the same and equal to the number of battery cells, and the balancing instrument is connected to the battery cells in sequence through the first power line, the fuse, and the second power line.
[0012] In the above-mentioned device for balancing cells in an energy storage battery pack, one end of the first power line is connected to the balancing instrument, and the other end is connected to the input pin integrated connector, and the input pin integrated connector is plugged into the input interface of the overcurrent protection box.
[0013] In the above-mentioned device for balancing cells in an energy storage battery pack, one end of the second power line is connected to the output pin integrated connector, and the output pin integrated connector is plugged into the output interface of the overcurrent protection box, and the other end of the second power line is connected to the integrated busbar interface.
[0014] In the above-mentioned device for balancing cells in an energy storage battery pack, the end of the second power line away from the integrated connector with the output pin is connected to the quick-connect integrated connector, and the quick-connect integrated connector is plugged into the integrated busbar interface.
[0015] In the above-mentioned device for balancing cells in an energy storage battery pack, the integrated busbar interface includes flexible circuit boards respectively connected to the battery cells, and the flexible circuit boards are arranged on a plastic structural member, and the plastic structural member is provided with a copper-aluminum busbar connected to the flexible circuit boards.
[0016] In the above-mentioned device for balancing cells in an energy storage battery pack, the overcurrent protection box is a flat closed box body, and the input interface and the output interface are respectively arranged on the circumferential outside of the overcurrent protection box.
[0017] Compared with traditional technologies, the advantages of this application are:
[0018] 1. The connection efficiency between the equalizer and the integrated busbar interface can be improved through the input pin integrated connector, output pin integrated connector, and quick-connect integrated connector.
[0019] 2. The safety of the integrated busbar interface can be effectively protected by connecting a fuse in series with the power cord.
[0020] 3. When any fuse blows, the sound and light alarm module can be triggered, which can further improve the safety of the battery pack during the balancing process. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the disclosed drawings without any creative work.
[0022] FIG1 is a schematic structural diagram of a device for balancing cells in an energy storage battery pack provided by the present application.
[0023] FIG2 is a schematic structural diagram of an overcurrent protection box provided in the present application.
[0024] FIG3 is a schematic structural diagram of an integrated busbar interface provided in this application.
[0025] In the figure: battery pack 1, battery cell 11, balancer 2, integrated busbar interface 3, flexible circuit board 31, plastic structural part 32, copper-aluminum busbar 33, power cord 4, first power cord 41, second power cord 42, overcurrent protection device 5, sound and light alarm module 51, signal indicator light 511, buzzer 512, overcurrent protection box 52, input interface 521, output interface 522, fuse 53, input pin integrated connector 6, output pin integrated connector 7, quick-connect integrated connector 8. DETAILED DESCRIPTION
[0026] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0027] As shown in Figure 1, a device for balancing cells in an energy storage battery pack includes a battery pack 1 with a plurality of battery cells 11 and a balancer 2 arranged on one side of the battery pack 1. The battery cells 11 are all connected to the integrated busbar interface 3. The balancer 2 is connected to a plurality of power cords 4. The power cords 4 are connected to the integrated busbar interface 3 by plugging. The power cords 4 correspond to and are connected to the battery cells 11 one by one, so that the balancer 2 can be directly connected to the battery pack 1, so that the battery cells 11 in the battery pack 1 can be directly balanced. An overcurrent protection device 5 is provided on the power cord 4. When the current fluctuates and causes the current to exceed the safe current value, the overcurrent protection device 5 can alarm the operator through sound and light, and can effectively protect the safety of the integrated busbar interface 3.
[0028] Specifically, the overcurrent protection device 5 includes an audible and visual alarm module 51 and an overcurrent protection box 52. A number of fuses 53 are provided in the overcurrent protection box 52. The fuses 53 correspond to the power lines 4 one by one and are connected to the power lines 4. The two ends of the audible and visual alarm module 51 are respectively connected to the two ends of the fuse 53. The fuse 53 and the audible and visual alarm module 51 are connected in series. The overcurrent requirement of the fuse 53 is less than the overcurrent limit value of the integrated busbar interface 3. When any fuse 53 is blown, the audible and visual alarm module 51 can be triggered, and the connection circuit with the integrated busbar interface 3 is disconnected, which can effectively protect the integrated busbar interface 3 in the battery pack 1.
[0029] Among them, the sound and light alarm module 51 is a signal indicator light 511 and a buzzer 512 arranged on the overcurrent protection box 52, and the signal indicator light 511 and the buzzer 512 are connected in series at both ends of each fuse 53. By being connected in series with the fuse 53, it can be controlled and connected with any fuse 53, and when the current is too large and causes any fuse 53 to melt, the signal indicator light 511 and the buzzer 512 will be triggered to alarm the operator.
[0030] As shown in Figures 1 and 2, preferably, the power cord 4 is divided into a first power cord 41 and a second power cord 42, and the fuse 53 is connected in series between the first power cord 41 and the second power cord 42. When the fuse 53 blows, the circuit of the first power cord 41 and the second power cord 42 can be disconnected in time to protect the integrated busbar interface 3.
[0031] Furthermore, the number of first power lines 41 and the number of second power lines 42 are the same and equal to the number of battery cells 11, and the balancer 2 is connected to the battery cells 11 in sequence through the first power line 41, the fuse 53 and the second power line 42, which can facilitate the balancing of the battery cells 11 by the balancer 2 and improve the balancing efficiency.
[0032] Among them, one end of the first power line 41 is connected to the equalizer 2, and the other end is connected to the input pin integrated connector 6, and the input pin integrated connector 6 is plugged into the input interface 521 of the overcurrent protection box 52. The input pin integrated connector 6 can standardize the first power line 41 and improve the plug-in efficiency of the first power line 41.
[0033] As shown in Figures 2 and 3, one end of the second power cord 42 is connected to the output pin integrated connector 7. The second power cord 42 can be standardized through the output pin integrated connector 7, and the output pin integrated connector 7 is plugged into the output interface 522 of the overcurrent protection box 52, which can improve the plugging efficiency of the second power cord 42 into the overcurrent protection box 52, and the other end of the second power cord 42 is connected to the integrated busbar interface 3.
[0034] Among them, the end of the second power line 42 away from the integrated connector 7 with the output pin is connected to the quick-connect integrated connector 8, and the quick-connect integrated connector 8 is plugged into the integrated busbar interface 3. The quick-connect integrated connector 8 can improve the plug-in efficiency with the integrated busbar interface 3, thereby improving the balancing efficiency.
[0035] Specifically, the integrated busbar interface 3 includes a flexible circuit board 31 respectively connected to the battery cells 11. The flexible circuit board 31 can greatly reduce the volume and weight of the battery pack 1, and can be freely bent and folded. The flexible circuit board 31 is arranged on a plastic structural member 32. The plastic structural member 32 can reduce the weight of the battery pack 1 and reduce costs. The plastic structural member 32 is provided with a copper-aluminum busbar 33 connected to the flexible circuit board 31. The copper-aluminum busbar 33 has good conductivity and is lighter in weight, and can further reduce costs.
[0036] 1 and 2 , the overcurrent protection box 52 is a flat closed box body, and the input interface 521 and the output interface 522 are respectively arranged on the circumferential outside of the overcurrent protection box 52 , so that the input interface 521 and the output interface 522 facilitate quick connection between the balancer 2 and the battery pack 1 .
[0037] The principle of this embodiment is that the balancer 2 and the integrated busbar interface 3 of the battery pack 1 are connected in series, and an overcurrent protection device 5 is installed in the series circuit. The overcurrent protection device 5 has a fuse 53 connected in series with the power cord 4. The overcurrent limit value of the fuse 53 is smaller than the overcurrent limit value of the integrated busbar interface 3. When the balancer 2 outputs a large current, any fuse 53 that blows can disconnect the circuit with the integrated busbar interface 3 and trigger the sound and light alarm module 51 in the overcurrent protection device 5 to notify the operator, thereby effectively protecting the safety of the integrated busbar interface 3 when the balancer 2 is balancing.
[0038] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present application or exceeding the scope defined by the appended claims.
[0039] Although this document frequently uses terms such as battery pack 1, battery cell 11, balancer 2, integrated busbar interface 3, flexible circuit board 31, plastic structural member 32, copper-aluminum busbar 33, power cord 4, first power cord 41, second power cord 42, overcurrent protection device 5, sound and light alarm module 51, signal indicator light 511, buzzer 512, overcurrent protection box 52, input interface 521, output interface 522, fuse 53, input pin integrated connector 6, output pin integrated connector 7, and quick-connect integrated connector 8, the use of other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of this application; interpreting them as any additional limitations is contrary to the spirit of this application.
[0040] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0041] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.
Claims
1. A device for balancing cells in an energy storage battery pack, comprising a battery pack (1) having a plurality of battery cells (11) and a balancing instrument (2) arranged on one side of the battery pack (1), wherein: The battery cells (11) are all connected to the integrated busbar interface (3), the equalizer (2) is connected to a plurality of power lines (4), the power lines (4) are connected to the integrated busbar interface (3) by plugging, and the power lines (4) correspond to and are connected to the battery cells (11) one by one, and an overcurrent protection device (5) is provided on the power lines (4).
2. A device for balancing cells in an energy storage battery pack according to claim 1, wherein: The overcurrent protection device (5) comprises an audible and visual alarm module (51) and an overcurrent protection box (52), wherein a plurality of fuses (53) are arranged in the overcurrent protection box (52), wherein the fuses (53) correspond to the power lines (4) one by one and are connected to the power lines (4), and the two ends of the audible and visual alarm module (51) are respectively connected to the two ends of the fuses (53).
3. A device for balancing cells in an energy storage battery pack according to claim 2, wherein: The sound and light alarm module (51) is a signal indicator light (511) and a buzzer (512) arranged on the overcurrent protection box (52), and the signal indicator light (511) and the buzzer (512) are connected in series at both ends of each fuse (53).
4. A device for balancing cells in an energy storage battery pack according to claim 2 or 3, wherein: The power line (4) is divided into a first power line (41) and a second power line (42), and the fuse (53) is connected in series between the first power line (41) and the second power line (42).
5. A device for balancing cells in an energy storage battery pack according to claim 4, wherein: The number of the first power lines (41) and the number of the second power lines (42) are the same and equal to the number of the battery cells (11), and the equalizer (2) is connected to the battery cells (11) in sequence through the first power lines (41), the fuses (53) and the second power lines (42).
6. A device for balancing cells in an energy storage battery pack according to claim 4, wherein: One end of the first power line (41) is connected to the equalizer (2), and the other end is connected to the input pin integrated connector (6), and the input pin integrated connector (6) is plugged into the input interface (521) of the overcurrent protection box (52).
7. A device for balancing cells in an energy storage battery pack according to claim 6, wherein: One end of the second power line (42) is connected to the output pin integrated connector (7), and the output pin integrated connector (7) is plugged into the output interface (522) of the overcurrent protection box (52), and the other end of the second power line (42) is connected to the integrated busbar interface (3).
8. A device for balancing cells in an energy storage battery pack according to claim 7, wherein: The end of the second power line (42) away from the integrated connector (7) with output pins is connected to the quick-connect integrated connector (8), and the quick-connect integrated connector (8) is plug-connected to the integrated busbar interface (3).
9. A device for balancing cells in an energy storage battery pack according to claim 1, wherein: The integrated busbar interface (3) comprises flexible circuit boards (31) respectively connected to the battery cells (11), and the flexible circuit boards (31) are arranged on a plastic structural member (32), and the plastic structural member (32) is provided with a copper-aluminum busbar (33) connected to the flexible circuit boards (31).
10. A device for balancing cells in an energy storage battery pack according to claim 7, wherein: The overcurrent protection box (52) is a flat closed box body, and the input interface (521) and the output interface (522) are respectively arranged on the circumferential outer side of the overcurrent protection box (52).