Energy storage battery system and energy storage equipment

Abstract

The invention provides an energy storage battery system and energy storage equipment. The energy storage battery system comprises a plurality of battery clusters, each battery cluster comprises a plurality of battery packs, each battery pack comprises a plurality of parts, the insulation resistance value of the energy storage battery system is R1, the insulation resistance value of each battery cluster is R2, the insulation resistance value of each battery pack is R3, and the insulation resistance value of each part is R4; wherein R1 < R2 < R3 < R4; in the embodiment of the invention, insulation hierarchical management and control in the energy storage battery system can be realized, so that the technical problem of low safety of the system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and particularly relates to an energy storage battery system and an energy storage device. Background Art

[0002] In recent years, new energy storage mainly based on lithium-ion batteries has been in a rapid development stage. However, frequent safety problems have become an important factor restricting the rapid development of new energy storage. The energy storage battery system includes batteries, and insulation problems are an important factor leading to safety problems in the energy storage battery system. There is a risk of battery leakage and insulation breakage between the positive and negative electrodes, so it is also easy to cause excessive leakage current in the system and generate risks.

[0003] In related technologies, in the energy storage system, the insulation resistance values of battery modules, battery clusters, and battery components are not hierarchically controlled. Therefore, the settings of the insulation resistance values of battery modules, battery clusters, and battery components in related technologies cannot ensure the safety of the system. Summary of the Invention

[0004] Embodiments of the present invention provide an energy storage battery system and an energy storage device, which can improve the technical problem that the settings of the insulation resistance values of battery modules, battery clusters, and battery components in related technologies cannot ensure the safety of the system.

[0005] In a first aspect, embodiments of the present invention provide an energy storage battery system. The energy storage battery system includes a plurality of battery clusters. Each battery cluster includes a plurality of battery packs. Each battery pack includes a plurality of components. The insulation resistance value of the energy storage battery system is R1, the insulation resistance value of the battery cluster is R2, the insulation resistance value of the battery pack is R3, and the insulation resistance value of the component is R4. Among them, R1 < R2 < R3 < R4.

[0006] In an embodiment, the energy storage battery system includes N1 battery clusters. Each battery cluster includes N2 battery packs. Each battery pack includes N3 components. Among them, R1 ≤ (R2 / N1) ≤ (R3 / (N1 * N2)) ≤ (R4 / (N1 * N2 * N3)).

[0007] In an embodiment, R1 ≤ (R2 / 10) ≤ (R3 / 100) ≤ (R4 / 1000).

[0008] In an embodiment, the insulation resistance value R1 of the energy storage battery system is > 1.5 MΩ.

[0009] In an embodiment, the insulation resistance value R1 of the energy storage battery system is ≥ 5 MΩ, and / or the insulation resistance value R2 of the battery cluster is ≥ 50 MΩ, and / or the insulation resistance value R3 of the battery pack is ≥ 500 MΩ, and / or the insulation resistance value R4 of the component is ≥ 5 GΩ.

[0010] In one embodiment, the withstand voltage leakage current of the energy storage battery system is I1, the withstand voltage leakage current of the battery cluster is I2, the withstand voltage leakage current of the battery pack is I3, and the withstand voltage leakage current of the component is I4, where I1 = I2 > I3 > I4.

[0011] In one embodiment, the energy storage battery system includes N1 battery clusters, each battery cluster includes N2 battery packs, and each battery pack includes N3 components. Among them, I1 = I2 ≥ (I3 * N2) ≥ (I4 * N2 * N3)

[0012] In one embodiment, I1 = I2 ≥ (I3 * 10) ≥ (I4 * 100).

[0013] In one embodiment, the withstand voltage leakage current I4 of the component ≤ 0.1 mA, and / or the withstand voltage leakage current I1 of the energy storage battery system ≤ 10 mA, and / or the withstand voltage leakage current I2 of the battery cluster ≤ 10 mA, and / or the withstand voltage leakage current I3 of the battery pack ≤ 1 mA.

[0014] In a second aspect, an embodiment of the present invention provides an energy storage device including the energy storage battery system.

[0015] Advantageous effects of the embodiments of the present invention:

[0016] In the embodiments of the present invention, through hierarchical control of the energy storage battery system, that is, hierarchical control of the insulation requirements of the battery clusters, battery packs, and components that make up the energy storage battery system, the insulation resistance value of the energy storage battery system is R1, the insulation resistance value of the battery cluster is R2, the insulation resistance value of the battery pack is R3, and the insulation resistance value of the component is R4; among them, R1 < R2 < R3 < R4; therefore, it is also possible to clarify the insulation detection requirements for the energy storage battery system, clarify the insulation outgoing inspection standards for each component in the energy storage battery system, and thus ensure the electrical safety of the DC energy storage system.

[0017] In the embodiments of the present invention, hierarchical control of the insulation inside the energy storage battery system can be achieved, thereby improving the technical problem of low system safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of an energy storage battery system provided by Embodiment 1 of the present invention;

[0020] Figure 2 It is a schematic structural diagram of an energy storage battery system provided by Embodiment 2 of the present invention;

[0021] Figure 3 It is a schematic structural diagram of a battery cluster;

[0022] Figure 4 It is a schematic structural diagram of a battery pack;

[0023] Figure 5 It is a schematic structural diagram of a component.

[0024] Reference numerals

[0025] 1. Energy storage battery system; 10. Battery cluster; 100. Battery pack; 1000. Component;

[0026] 2. Insulation withstand voltage detector. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise stated, the orientation terms such as "upper" and "lower" usually refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings; and "inner" and "outer" refer to the outline of the device.

[0028] Referring to Figure 1 as shown, the present application provides an energy storage battery system 1, the energy storage battery system 1 includes a plurality of battery clusters 10, each of the battery clusters 10 includes a plurality of battery packs 100, each of the battery packs 100 includes a plurality of components 1000, the insulation resistance value of the energy storage battery system 1 is R1, the insulation resistance value of the battery cluster 10 is R2, the insulation resistance value of the battery pack 100 is R3, and the insulation resistance value of the component 1000 is R4; wherein, R1 < R2 < R3 < R4.

[0029] It can be understood that in the energy storage battery system 1, a plurality of battery clusters 10 are connected in series or in parallel to form the energy storage battery system 1, each battery cluster 10 is formed by connecting a plurality of battery packs 100 in series, and each battery pack 100 is formed by connecting components 1000 in series.

[0030] In an embodiment of the present invention, by implementing hierarchical control over the energy storage battery system 1, that is, hierarchically controlling the insulation requirements of the battery clusters 10, battery packs 100, and components 1000 that make up the energy storage battery system 1, the insulation resistance value of the energy storage battery system 1 is R1, the insulation resistance value of the battery cluster 10 is R2, the insulation resistance value of the battery pack 100 is R3, and the insulation resistance value of the component 1000 is R4; where R1 < R2 < R3 < R4; Therefore, it is also possible to clarify the insulation detection requirements for the energy storage battery system 1, clarify the insulation shipping inspection standards for each component in the energy storage battery system 1, and thus ensure the electrical safety of the DC energy storage system.

[0031] In an embodiment of the present invention, hierarchical insulation control within the energy storage battery system 1 can be achieved, thereby improving the technical problem of low system safety.

[0032] It can be understood that, as shown in Figures 2 to 5 For the convenience of detection, an insulation withstand voltage detector 2 is connected to the energy storage battery system 1, the battery cluster 10, the battery pack 100, and the component 1000.

[0033] In some embodiments, the energy storage battery system 1 includes N1 of the battery clusters 10, each of the battery clusters 10 includes N2 of the battery packs 100, and each of the battery packs 100 includes N3 of the components 1000, where R1 ≤ (R2 / N1) ≤ (R3 / (N1 * N2)) ≤ (R4 / (N1 * N2 * N3)).

[0034] Exemplarily, in the present embodiment, when the operating temperature range of the energy storage battery system 1 is -40°C to 60°C, R1 ≤ (R2 / N1) ≤ (R3 / (N1 * N2)) ≤ (R4 / (N1 * N2 * N3)).

[0035] Specifically, in the present embodiment, the energy storage battery system 1 includes 10 of the battery clusters 10, each of the battery clusters 10 includes 9 battery packs 100, and each of the battery packs 100 includes 9 components 1000.

[0036] In the present embodiment, R1 ≤ (R2 / 10) ≤ (R3 / 100) ≤ (R4 / 1000).

[0037] Exemplarily, when the energy storage battery system 1 is in a standard test environment of 25°C, R1 ≤ (R2 / 10) ≤ (R3 / 100) ≤ (R4 / 1000).

[0038] It should also be noted that, as shown in Figure 1 and Figure 2As shown, in the specific production process, the maximum composition of the energy storage battery system 1 is 10 battery clusters 10. Whether these 10 battery clusters 10 are connected in series or in parallel, the insulation circuits of the battery clusters 10 to the ground are in parallel, and the energy storage battery system 1 is hierarchically divided downward in parallel. Therefore, the insulation requirements for the next level are higher than those for the previous level;

[0039] Similarly, referring to Figure 3 As shown, the battery cluster 10 is composed of 8 battery packs 100 and 1 high-voltage box. Therefore, the normal insulation standard of the battery cluster 10 is 9 times that of the energy storage battery system 1. However, in this embodiment, the insulation standard of the battery cluster 10 and the energy storage battery system 1 is strengthened to 10 times of control;

[0040] Referring to Figure 4 As shown, the composition of the battery pack 100 is relatively complex. The insulating components 1000 it consists of include structural components and electrical components 1000, such as: positive high-voltage connectors, positive conductive blocks between the positive pole aluminum row and the end plate, blue film and thermal conductive gel (large surface) between the bottom of the battery cell and the liquid cooling plate, negative conductive blocks between the negative pole aluminum row and the end plate, fuses, MSDs, negative high-voltage connectors, etc. However, the number of components 1000 for both the positive and negative poles is within 10. Therefore, in this embodiment, the insulation standard is strengthened to 10 times of control;

[0041] Similarly, referring to Figure 4 As shown, the internal components 1000 of the high-voltage box, such as positive high-voltage connectors, negative high-voltage connectors, positive relays, negative relays, pre-charge relays, pre-charge resistors, circuit breakers, insulators, etc., are in contact with sheet metal parts and the insulation performance needs to be controlled. Like the battery pack 100, it can also be controlled according to the 10-fold standard.

[0042] In some embodiments, in order to meet the national standards of the energy storage battery system 1, the insulation resistance value R1 of the energy storage battery system 1 > 1.5 MΩ.

[0043] In some embodiments, the insulation resistance value R1 of the energy storage battery system 1 ≥ 5 MΩ. Thus, the insulation requirements of the energy storage battery system 1 can be strengthened, the safety redundancy can be increased, and the insulation reliability of the system can be ensured.

[0044] In some embodiments, the insulation resistance value R2 of the battery cluster 10 ≥ 50 MΩ. That is, the insulation resistance value of the battery cluster 10 is set to ten times that of the energy storage battery system 1 to meet the insulation requirements of the battery cluster 10 and ensure the insulation reliability of the system.

[0045] In some embodiments, the insulation resistance value R3 of the battery pack 100 is ≥ 500 MΩ. That is, the insulation resistance value of the battery pack 100 is set to be ten times that of the battery cluster 10, meeting the insulation requirements of the battery pack 100 and ensuring the insulation reliability of the system.

[0046] In some embodiments, the insulation resistance value R4 of the component 1000 is ≥ 5 GΩ. That is, the insulation resistance value of the component 1000 is set to be ten times that of the battery pack 100, meeting the insulation requirements of the component 1000 and ensuring the insulation reliability of the system.

[0047] In some embodiments, the insulation resistance value R1 of the energy storage battery system 1 is ≥ 5 MΩ, the insulation resistance value R2 of the battery cluster 10 is ≥ 50 MΩ, the insulation resistance value R3 of the battery pack 100 is ≥ 500 MΩ, and the insulation resistance value R4 of the component 1000 is ≥ 5 GΩ. Thus, by hierarchically setting the insulation of the energy storage battery system 1, the insulation requirements of the energy storage battery system 1 can be strengthened, and the safety redundancy is also increased, ensuring the insulation reliability of the system.

[0048] Exemplarily, in this embodiment, when the energy storage battery system 1 is tested in an environment with a relative humidity ≤ 90%, the insulation resistance value R1 of the energy storage battery system 1 is ≥ 5 MΩ, the insulation resistance value R2 of the battery cluster 10 is ≥ 50 MΩ, the insulation resistance value R3 of the battery pack 100 is ≥ 500 MΩ, and the insulation resistance value R4 of the component 1000 is ≥ 5 GΩ.

[0049] It can be understood that in this embodiment, the specific measurement requirements for the insulation of the energy storage battery system 1 are as follows: Taking a DC 1500V system as an example, measure the insulation between the positive and negative poles and the grounded shell. Among them, the insulation requirements for the component 1000 are: 2500 Vdc, 1 min (rising for 10 s, falling for 10 s), insulation resistance value ≥ 5 GΩ; the insulation requirements for the battery pack 100 or the high-voltage box are: 2500 Vdc, 1 min (rising for 10 s, falling for 10 s), insulation resistance value ≥ 500 MΩ; the insulation requirements for the battery cluster 10 are: 2500 Vdc, 1 min (rising for 10 s, falling for 10 s), insulation resistance value ≥ 50 MΩ; the insulation requirements for the energy storage battery system 1 are: 2500 Vdc, 1 min (rising for 10 s, falling for 10 s), insulation resistance value ≥ 5 MΩ.

[0050] In some embodiments, the magnitude of the withstand voltage leakage current of the energy storage battery system 1 is I1, the magnitude of the withstand voltage leakage current of the battery cluster 10 is I2, the magnitude of the withstand voltage leakage current of the battery pack 100 is I3, and the magnitude of the withstand voltage leakage current of the component 1000 is I4, where I1 = I2 > I3 > I4.

[0051] In some embodiments, the energy storage battery system 1 includes N1 battery clusters 10, each battery cluster 10 includes N2 battery packs 100, and each battery pack 100 includes N3 components 1000, where I1 = I2 ≥ (I3 * N2) ≥ (I4 * N2 * N3).

[0052] It can be understood that in this embodiment, the energy storage battery system 1 includes 10 battery clusters 10, each battery cluster 10 includes 9 battery packs 100, and each battery pack 100 includes 9 components 1000.

[0053] Of course, in other embodiments, different numbers can also be set according to actual usage needs.

[0054] In some embodiments, I1 = I2 ≥ (I3 * 10) ≥ (I4 * 100).

[0055] In some embodiments, in order to ensure the safety of the energy storage battery system 1, the withstand voltage leakage current magnitude I4 of the component 1000 is ≤ 0.1 mA.

[0056] In some embodiments, in order to meet the national standards of the energy storage battery system 1, the withstand voltage leakage current magnitude I1 of the energy storage battery system 1 is ≤ 10 mA.

[0057] In some embodiments, the withstand voltage leakage current magnitude I2 of the battery cluster 10 is ≤ 10 mA. That is, the withstand voltage leakage current magnitude of the battery cluster 10 is set to ten times that of the component 1000, meeting the withstand voltage requirements of the battery cluster 10 and ensuring the withstand voltage reliability of the system.

[0058] In some embodiments, the withstand voltage leakage current magnitude I3 of the battery pack 100 is ≤ 1 mA. That is, the withstand voltage leakage current magnitude of the battery pack 100 is set to ten times that of the battery cluster 10, meeting the withstand voltage requirements of the battery pack 100 and ensuring the withstand voltage reliability of the system.

[0059] In some embodiments, the withstand voltage leakage current magnitude I4 of the component 1000 is ≤ 0.1 mA, the withstand voltage leakage current magnitude I1 of the energy storage battery system 1 is ≤ 10 mA, the withstand voltage leakage current magnitude I2 of the battery cluster 10 is ≤ 10 mA, and the withstand voltage leakage current magnitude I3 of the battery pack 100 is ≤ 1 mA.

[0060] It can be understood that in this embodiment, the specific measurement requirements for the DC withstand voltage leakage current of the energy storage battery system 1 are as follows: Taking the DC 1500V system as an example, measure the withstand voltage between the positive and negative poles and the shell ground. Among them, the withstand voltage requirement for the component 1000 is: 5880Vdc, 1min (rise for 10s, fall for 10s), leakage current ≤ 0.1mA, and there is no flashover phenomenon and no breakdown phenomenon; 4200Vac, 1min (rise for 10s, fall for 10s), no flashover and no breakdown; the withstand voltage requirement for the battery pack 100 or the high-voltage box is: 5880Vdc, 1min (rise for 10s, fall for 10s), leakage current ≤ 1mA, and there is no flashover phenomenon and no breakdown phenomenon; 4200Vac, 1min (rise for 10s, fall for 10s), and there is no flashover phenomenon and no breakdown phenomenon; the withstand voltage requirement for the battery cluster 10 or the energy storage battery system 1 is: 5880Vdc, 1min (rise for 10s, fall for 10s), leakage current ≤ 10mA, and there is no flashover phenomenon and no breakdown phenomenon; 4200Vac, 1min (rise for 10s, fall for 10s), and there is no flashover phenomenon and no breakdown phenomenon.

[0061] In a second aspect, the present application also provides an energy storage device, and the energy storage device includes the energy storage battery system 1.

[0062] The independent claim of this energy storage device has all the beneficial effects of the above-mentioned energy storage battery system 1:

[0063] By implementing hierarchical control over the energy storage battery system 1, that is, hierarchically controlling the insulation requirements of the battery cluster 10, the battery pack 100, and the component 1000 that make up the energy storage battery system 1, the insulation resistance value of the energy storage battery system 1 is R1, the insulation resistance value of the battery cluster 10 is R2, the insulation resistance value of the battery pack 100 is R3, and the insulation resistance value of the component 1000 is R4; among them, R1 < R2 < R3 < R4; therefore, it is also possible to clarify the insulation detection requirements for the energy storage battery system 1, clarify the insulation outgoing inspection standards for each component in the energy storage battery system 1, and thus ensure the electrical safety of the DC energy storage system.

[0064] In the embodiment of the present invention, hierarchical control of the insulation inside the energy storage battery system 1 can be realized, thereby improving the technical problem of low system safety.

[0065] The above has introduced the embodiments of the present invention in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A energy storage battery system, the energy storage battery system includes a plurality of battery clusters, each of the battery clusters includes a plurality of battery packs, and each of the battery packs includes a plurality of components, characterized in that, The insulation resistance value of the energy storage battery system is R1, the insulation resistance value of the battery cluster is R2, the insulation resistance value of the battery pack is R3, and the insulation resistance value of the component is R4; wherein, R1 < R2 < R3 < R4.

2. The energy storage battery system according to claim 1, wherein The energy storage battery system includes N1 of the battery clusters, each of the battery clusters includes N2 of the battery packs, and each of the battery packs includes N3 of the components, wherein, R1 ≤ (R2 / N1) ≤ (R3 / (N1*N2)) ≤ (R4 / (N1*N2*N3)).

3. The energy storage battery system according to claim 2, wherein, R1 ≤ (R2 / 10) ≤ (R3 / 100) ≤ (R4 / 1000).

4. A energy storage battery system according to any one of claims 1-3, characterized in that, The insulation resistance value R1 of the energy storage battery system is > 1.5 MΩ.

5. The energy storage battery system according to claim 4, characterized in that, The insulation resistance value R1 of the energy storage battery system is ≥ 5 MΩ, and / or the insulation resistance value R2 of the battery cluster is ≥ 50 MΩ, and / or the insulation resistance value R3 of the battery pack is ≥ 500 MΩ, and / or the insulation resistance value R4 of the component is ≥ 5 GΩ.

6. The energy storage battery system according to claim 1, wherein, The magnitude of the withstand voltage leakage current of the energy storage battery system is I1, the magnitude of the withstand voltage leakage current of the battery cluster is I2, the magnitude of the withstand voltage leakage current of the battery pack is I3, and the magnitude of the withstand voltage leakage current of the component is I4, I1 = I2 > I3 > I4.

7. The energy storage battery system according to claim 6, characterized in that, The energy storage battery system includes N1 of the battery clusters, each of the battery clusters includes N2 of the battery packs, and each of the battery packs includes N3 of the components, wherein, I1 = I2 ≥ (I3*N2) ≥ (I4*N2*N3).

8. An energy storage battery system according to claim 7, characterized in that, I1 = I2 ≥ (I3*10) ≥ (I4*100).

9. A energy storage battery system according to any one of claims 7-8, characterized in that, The magnitude of the withstand voltage leakage current I4 of the component is ≤ 0.1 mA, and / or the magnitude of the withstand voltage leakage current I1 of the energy storage battery system is ≤ 10 mA, and / or the magnitude of the withstand voltage leakage current I2 of the battery cluster is ≤ 10 mA, and / or the magnitude of the withstand voltage leakage current I3 of the battery pack is ≤ 1 mA.

10. A energy storage device, characterized in that, An energy storage battery system comprising any one of claims 1-9.

Images