Clamping configuration method, electronic device, medium, energy storage module, and energy storage device

Abstract

Disclosed are a clamping configuration method, an electronic device (200), a medium, an energy storage module (100) and an energy storage device. The clamping configuration method comprises: acquiring the degree of non-uniformity of a bottom electric field of a battery cell (152); on the basis of the degree of non-uniformity of the bottom electric field of the battery cell (152), acquiring a carrier injection flux under a positive electric field and a carrier injection flux under a negative electric field; on the basis of the carrier injection flux under the positive electric field and the carrier injection flux under the negative electric field, acquiring the difference between interface accumulated charge fluxes under the positive and negative electric fields and the difference between space charge injection fluxes at an insulating layer of the battery cell under the positive and negative electric fields; and, on the basis of a multi-layer interface insulating quality weight and a single-layer dielectric insulating quality weight, the difference between the interface accumulated charge fluxes, and the difference between the space charge injection fluxes, acquiring the ratio of the resistance of a first clamping resistor to that of a second clamping resistor.

Description

Clamping configuration method, electronic device, medium, energy storage module and energy storage device

[0001] Priority information

[0002] This application claims priority to and the benefit of Chinese Patent Application No. 202410845150.6, filed on June 26, 2024, and is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the field of energy storage, in particular to a clamping configuration method, an electronic device, a medium, an energy storage module and an energy storage device. BACKGROUND

[0004] At present, the energy storage device includes an electric box shell and a battery monomer, the battery monomer is located in the electric box shell, and insulation exists between the battery monomer and the electric box shell. In the related art, the electric box shell is clamped. However, the current clamping scheme is prone to cause the asynchronous state of insulation failure of the battery monomer. SUMMARY

[0005] In view of the above problems, the present application provides a clamping configuration method, an electronic device, a medium, an energy storage module and an energy storage device, which can solve or alleviate the problem of asynchronous state of insulation failure of the battery monomer.

[0006] In a first aspect, the present application provides a clamping configuration method for an energy storage module, the energy storage module including a positive electrode, a negative electrode, a first clamping resistor, a second clamping resistor and an electric box, the electric box including a first shell and a battery monomer, the battery monomer being located in the first shell, the first clamping resistor and the second clamping resistor being connected in series, one end of the first clamping resistor being connected to the positive electrode, one end of the second clamping resistor being connected to the negative electrode, a clamping point of the energy storage module being connected to the other end of the first clamping resistor and the other end of the second clamping resistor, and the first shell being connected to the clamping point.

[0007] The clamping configuration method includes:

[0008] obtaining a bottom electric field non-uniformity of the battery monomer;

[0009] obtaining a carrier injection flux under a positive electric field and a carrier injection flux under a negative electric field according to the bottom electric field non-uniformity of the battery monomer;

[0010] obtaining a difference in interfacial space charge flux under positive and negative electric fields and a difference in space charge injection flux of the battery monomer insulation layer under positive and negative electric fields according to the carrier injection flux under the positive electric field and the carrier injection flux under the negative electric field;

[0011] According to the multi-layer interface insulation quality weight and the single-layer medium insulation quality weight, the interface area accumulated charge flux difference and the space charge injection flux difference, a resistance ratio value of the first clamping resistor and the second clamping resistor is obtained.

[0012] In the technical scheme of the embodiments of the present application, the clamping configuration method considers balancing the polarity effect of the uneven electric field at the bottom of the electric box insulation, introduces the bottom electric field unevenness of the battery monomer, the interface area accumulated charge flux difference under the positive and negative polarity electric fields, and the space charge injection flux difference of the battery monomer insulation layer under the positive and negative polarity electric fields, so as to obtain the resistance ratio value of the first clamping resistor and the second clamping resistor, and then the voltage borne by the bottom insulation of the battery monomer on both sides of the clamping point can be reasonably configured, so that the space charge characteristics under the positive and negative polarity electric field strengths are close to each other, and the problem of asynchronous insulation failure on both sides of the clamping point is avoided to a certain extent.

[0013] In some embodiments, the bottom electric field unevenness of the battery monomer is obtained by using the operating voltage of the energy storage module, the electric box insulation structure model, the electrical parameters of the insulation material, and the effective element simulation method.

[0014] Therefore, the bottom electric field unevenness of the battery monomer can be obtained.

[0015] In some embodiments, the carrier injection flux under the positive polarity electric field is obtained according to the relationship between the carrier injection flux and the electric field strength under the positive polarity electric field, and the bottom electric field unevenness of the battery monomer.

[0016] The carrier injection flux under the negative polarity electric field is obtained according to the relationship between the carrier injection flux and the electric field strength under the negative polarity electric field, and the bottom electric field unevenness of the battery monomer.

[0017] Therefore, the carrier injection flux under the positive polarity electric field and the carrier injection flux under the negative polarity electric field can be obtained.

[0018] In some embodiments, the carrier injection flux under the positive polarity electric field includes the hole injection flux under the positive polarity electric field and the electron injection flux under the positive polarity electric field, and the carrier injection flux under the negative polarity electric field includes the hole injection flux under the negative polarity electric field and the electron injection flux under the negative polarity electric field.

[0019] Therefore, the carrier injection flux under the positive polarity electric field and the carrier injection flux under the negative polarity electric field can be obtained by the hole injection flux under the positive polarity electric field, the electron injection flux under the positive polarity electric field, the hole injection flux under the negative polarity electric field, and the electron injection flux under the negative polarity electric field.

[0020] In some embodiments, the difference between the interfacial area accumulated charge flux under the positive polarity electric field and the interfacial area accumulated charge flux under the negative polarity electric field is the absolute value of the difference between the interfacial area accumulated charge flux under the positive polarity electric field and the interfacial area accumulated charge flux under the negative polarity electric field.

[0021] The interfacial area accumulated charge flux under the positive polarity electric field is obtained according to the hole injection flux under the positive polarity electric field and the electron injection flux under the positive polarity electric field.

[0022] The interfacial area accumulated charge flux under the negative polarity electric field is obtained according to the hole injection flux under the negative polarity electric field and the electron injection flux under the negative polarity electric field.

[0023] Thus, the difference between the interfacial area accumulated charge flux under the positive polarity electric field and the interfacial area accumulated charge flux under the negative polarity electric field can be obtained.

[0024] In some embodiments, the difference between the space charge injection flux of the battery monomer insulating layer under the positive polarity electric field and the space charge injection flux of the battery monomer insulating layer under the negative polarity electric field is obtained according to the hole injection flux under the positive polarity electric field and the electron injection flux under the negative polarity electric field.

[0025] Thus, the difference between the space charge injection flux of the battery monomer insulating layer under the positive polarity electric field and the space charge injection flux of the battery monomer insulating layer under the negative polarity electric field can be determined.

[0026] In some embodiments, the multi-layer interfacial insulating quality weight and the single-layer medium insulating quality weight satisfy the relationship: w IF +w DE =1, where w IF represents the multi-layer interfacial insulating quality weight, and w DE represents the single-layer medium insulating quality weight.

[0027] Thus, the multi-layer interfacial insulating quality weight w IF and the single-layer medium insulating quality weight w DE are limited to each other.

[0028] In some embodiments, the resistance ratio value of the first clamping resistor and the second clamping resistor is obtained using an optimization algorithm with w IF , Δj IF , w DE , and Δj DE forming a target function, where w IF represents the multi-layer interfacial insulating quality weight, w DE represents the single-layer medium insulating quality weight, Δj IF represents the difference between the interfacial area accumulated charge flux under the positive polarity electric field and the interfacial area accumulated charge flux under the negative polarity electric field, and Δj DE represents the difference between the space charge injection flux of the battery monomer insulating layer under the positive polarity electric field and the space charge injection flux of the battery monomer insulating layer under the negative polarity electric field.

[0029] Thus, the resistance ratio value of the first clamping resistor and the second clamping resistor can be determined.

[0030] In a second aspect, the present application provides an electronic device, comprising:

[0031] a processor, and

[0032] a memory, wherein the memory stores a computer program, and the computer program, when executed by the processor, implements the steps of the clamping configuration method of any of the above embodiments.

[0033] In a third aspect, the present application provides a computer-readable storage medium, which stores a computer program, and the computer program, when executed by a processor, implements the steps of the clamping configuration method of any of the above embodiments.

[0034] In the technical solution of the embodiments of the present application, the above electronic device and computer-readable storage medium consider balancing the polarity effect of the uneven electric field of the insulating bottom of the battery box, introduce the bottom electric field unevenness of the battery monomer and the difference in space charge injection flux of the battery monomer insulating layer under positive and negative polarity electric fields, and other parameters, so as to obtain the resistance ratio value of the first clamping resistor and the second clamping resistor, the resistance value of the first clamping resistor and the resistance value of the second clamping resistor are not equal, and then the voltage borne by the bottom insulation of the battery monomer on both sides of the clamping point can be reasonably configured, so that the space charge characteristics under the positive and negative polarity field strengths are close to each other, and to a certain extent, the problem of asynchronous insulation failure on both sides of the clamping point is avoided.

[0035] In a fourth aspect, the present application provides an energy storage module, comprising a positive electrode, a negative electrode, a first clamping resistor, a second clamping resistor, and a battery box, wherein the battery box comprises a first shell and a battery monomer, the battery monomer is located in the first shell, the first clamping resistor and the second clamping resistor are connected in series, one end of the first clamping resistor is connected to the positive electrode, one end of the second clamping resistor is connected to the negative electrode, a clamping point of the energy storage module is connected to the other end of the first clamping resistor and the other end of the second clamping resistor, and the first shell is connected to the clamping point, wherein the resistance ratio value of the first clamping resistor and the second clamping resistor is determined by the clamping configuration method of any of the above embodiments.

[0036] In some embodiments, the energy storage module further comprises a master control box and an electric cabinet, the master control box comprises a second shell, the electric cabinet comprises a third shell, the energy storage module is located in the third shell, the second shell is connected to the clamping point, and the first shell is connected to the second shell through the third shell.

[0037] Therefore, the first shell, the second shell, and the third shell can be at the same potential.

[0038] In some embodiments, the first clamping resistor has a resistance value greater than the second clamping resistor.

[0039] In this way, the resistance values of the first and second clamping resistors meet the configuration of the energy storage module of the present application, further avoiding the problem of asynchronous insulation failure on both sides of the clamping point to some extent.

[0040] In some embodiments, the resistance value ratio of the first clamping resistor and the second clamping resistor ranges from (5:5, 8:2].

[0041] The resistance value ratio in the range of (5:5, 8:2] is not too small for the second clamping resistor corresponding to the lower limit value 8:2 or other ratio values close to the lower limit value, so as to avoid too sensitive changes in resistance value due to production deviation of the resistor to some extent.

[0042] In a fifth aspect, the present application provides an energy storage module, which comprises a positive electrode, a negative electrode, a first clamping resistor, a second clamping resistor and an electric box, the electric box comprises a first shell and a battery monomer, the battery monomer is located in the first shell, the first clamping resistor and the second clamping resistor are connected in series, one end of the first clamping resistor is connected to the positive electrode, one end of the second clamping resistor is connected to the negative electrode, a clamping point of the energy storage module is connected to the other end of the first clamping resistor and the other end of the second clamping resistor, and the first shell is connected to the clamping point.

[0043] In some embodiments, the resistance value of the first clamping resistor is greater than the resistance value of the second clamping resistor.

[0044] Since the resistance value of the first clamping resistor is greater than the resistance value of the second clamping resistor, the space charge characteristics under the positive and negative polarity field strengths can be made close to each other, thereby avoiding the problem of asynchronous insulation failure on both sides of the clamping point to some extent.

[0045] In some embodiments, the energy storage module further comprises a master control box and an electric cabinet, the master control box comprises a second shell, the electric cabinet comprises a third shell, the energy storage module is located in the third shell, the second shell is connected to the clamping point, and the first shell is connected to the second shell through the third shell.

[0046] In some embodiments, the first clamping resistor has a resistance value greater than the second clamping resistor.

[0047] In this way, the resistance values of the first and second clamping resistors meet the configuration of the energy storage module of the present application, further avoiding the problem of asynchronous insulation failure on both sides of the clamping point to some extent.

[0048] In some embodiments, the resistance ratio value of the first clamping resistor and the second clamping resistor ranges from (5:5, 8:2].

[0049] The resistance ratio value in the range of (5:5, 8:2] corresponds to the second clamping resistor with the lower limit value 8:2 or other ratio values close to the lower limit value, and the resistance value is not too small, thereby avoiding too sensitive changes in resistance value due to production deviation of the resistor to a certain extent.

[0050] In a sixth aspect, the present application provides an energy storage device, which comprises the energy storage module of any of the above embodiments.

[0051] In the energy storage module and the energy storage device of the technical solutions of the embodiments of the present application, since the resistance value of the first clamping resistor and the resistance value of the second clamping resistor are not equal, the energy storage module and the energy storage device can avoid the problem of asynchronous insulation failure of the two sides of the clamping point to a certain extent.

[0052] The above description is only a summary of the technical solutions of the present application, in order to enable the technical means of the present application to be more clearly understood, and to be implemented according to the content of the specification, and in order to enable the above and other purposes, features and advantages of the present application to be more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0053] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a better understanding of the preferred embodiments, and are not to be considered as limiting of the present application. Moreover, in the drawings, like reference numerals denote similar parts throughout the several views. In the drawings:

[0054] FIG. 1 is a structural schematic diagram of an energy storage module according to some embodiments of the present application;

[0055] FIG. 2 is a flow schematic diagram of a clamping configuration method according to some embodiments of the present application;

[0056] FIGS. 3-4 are structural schematic diagrams of energy storage modules according to some embodiments of the present application;

[0057] FIG. 5 is a schematic diagram of an electronic device according to some embodiments of the present application;

[0058] FIGS. 6-7 are structural schematic diagrams of energy storage modules of comparative examples.

[0059] The specific embodiment is as follows: energy storage module 100, positive electrode 11, negative electrode 12, first clamping resistor 13, second clamping resistor 14, electric box 15, first shell 151, battery monomer 152, insulation layer 153, structural adhesive layer 154, bottom plate 155, shell 156, main control box 16, second shell 161, electric cabinet 17, third shell 171; electronic equipment 200, processor 21, memory 22. Specific embodiments

[0060] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" in the specification and claims of the present application and the above description of the drawings are intended to cover non-exclusive inclusion.

[0062] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly and specifically limited.

[0063] In this paper, "embodiment" means that the specific features, structures or properties described in conjunction with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment independent of or alternative to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0064] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents a "or" relationship between the front and rear associated objects.

[0065] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0066] In the description of the embodiments of the present application, the orientations or positional relationships indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0067] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0068] At present, the energy storage device includes an electric box shell and a battery monomer, the battery monomer is located in the electric box shell, and insulation exists between the battery monomer and the electric box shell. In the related technology, the electric box shell is clamped. However, the current clamping processing scheme is easy to cause the asynchronous state of the insulation failure of the battery monomer.

[0069] Based on the above consideration, in order to solve or alleviate the problem of the asynchronous state of the insulation failure of the battery monomer, the present application provides a clamping configuration method for an energy storage module, the energy storage module includes a positive electrode, a negative electrode, a first clamping resistor, a second clamping resistor and an electric box, the electric box includes a first shell and a battery monomer, the battery monomer is located in the first shell, the first clamping resistor and the second clamping resistor are connected in series, one end of the first clamping resistor is connected to the positive electrode, one end of the second clamping resistor is connected to the negative electrode, a clamping point of the energy storage module is connected to the other end of the first clamping resistor and the other end of the second clamping resistor, and the first shell is connected to the clamping point.

[0070] The clamping configuration method includes:

[0071] Obtaining the bottom electric field non-uniformity of the battery monomer;

[0072] Obtaining the carrier injection flux under the positive polarity electric field and the carrier injection flux under the negative polarity electric field according to the bottom electric field non-uniformity of the battery monomer;

[0073] The difference between the interfacial accumulated charge flux under the positive polarity electric field and the negative polarity electric field and the difference between the space charge injection flux of the insulating layer of the battery monomer under the positive polarity electric field and the negative polarity electric field are obtained according to the carrier injection flux under the positive polarity electric field and the carrier injection flux under the negative polarity electric field.

[0074] The resistance ratio value of the first clamping resistor and the second clamping resistor is obtained according to the multi-layer interface insulating quality weight and the single-layer medium insulating quality weight, the difference between the interfacial accumulated charge flux and the difference between the space charge injection flux.

[0075] In the technical scheme of the embodiment of the application, the clamping configuration method considers balancing the polarity effect of the non-uniform electric field at the bottom of the electric box, introduces the bottom electric field non-uniformity of the battery monomer, the difference between the interfacial accumulated charge flux under the positive polarity electric field and the negative polarity electric field, and the difference between the space charge injection flux of the insulating layer of the battery monomer under the positive polarity electric field and the negative polarity electric field, and thus obtains the resistance ratio value of the first clamping resistor and the second clamping resistor. The resistance value of the first clamping resistor and the resistance value of the second clamping resistor are not equal, and thus the voltage borne by the bottom insulation of the battery monomers on both sides of the clamping point can be reasonably configured, the space charge characteristics under the positive polarity electric field and the negative polarity electric field are close to each other, and the problem of non-synchronous insulation failure on both sides of the clamping point is avoided to a certain extent.

[0076] In the application, the electric box refers to a physical module including one or more battery monomers to store and provide electric energy. For example, the electric box mentioned in the application can include a battery module or a battery pack, etc. The electric box generally includes a first shell for packaging one or more battery monomers. The first shell can avoid the influence of liquid or other foreign matters on the charging or discharging of the battery monomers.

[0077] Alternatively, the battery monomer can include a lithium ion secondary battery, a lithium ion primary battery, a lithium-sulfur battery, a sodium lithium ion battery, a sodium ion battery, or a magnesium ion battery, etc., which are not limited in the embodiment of the application. The battery monomer can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc., which are not limited in the embodiment of the application. The battery monomer is generally divided into three types according to the packaging mode: cylindrical battery monomers, rectangular battery monomers, and soft-packaged battery monomers, which are not limited in the embodiment of the application.

[0078] According to some embodiments of the present application, please refer to FIG. 1 and FIG. 2, the present application provides a clamping configuration method for an energy storage module 100. The energy storage module 100 includes a positive electrode 11, a negative electrode 12, a first clamping resistor 13, a second clamping resistor 14, and an electric box 15, the electric box 15 includes a first shell 151 and a battery cell 152, the battery cell 152 is located in the first shell 151, the first clamping resistor 13 and the second clamping resistor 14 are connected in series, one end of the first clamping resistor 13 is connected to the positive electrode 11, one end of the second clamping resistor 14 is connected to the negative electrode 12, a clamping point C of the energy storage module 100 is connected to the other end of the first clamping resistor 13 and the other end of the second clamping resistor 14, and the first shell 151 is connected to the clamping point C.

[0079] The clamping configuration method includes:

[0080] 01, obtaining the bottom electric field non-uniformity k of the battery cell 152 E ;

[0081] 03, according to the bottom electric field non-uniformity k of the battery cell 152 E , obtaining the carrier injection flux under the positive polarity electric field and the carrier injection flux under the negative polarity electric field;

[0082] 05, according to the carrier injection flux under the positive polarity electric field and the carrier injection flux under the negative polarity electric field, obtaining the difference Δj of the interfacial space charge flux under the positive and negative polarity electric fields IF and the space charge injection flux difference Δj of the insulating layer 153 of the battery cell 152 under the positive and negative polarity electric fields DE ;

[0083] 07, according to the multi-layer interface insulating quality weight w IF and the single-layer medium insulating quality weight w DE , the difference Δj of the interfacial space charge flux IF and the space charge injection flux difference Δj DE , obtaining the resistance ratio value of the first clamping resistor 13 and the second clamping resistor 14.

[0084] The energy storage module 100 can be applied to energy storage equipment, and the energy storage module 100 can store electric energy generated by photovoltaic power generation and wind power generation.

[0085] Please refer to FIG. 6, as a comparative example, in the clamping scheme of FIG. 6, the clamping point is C0, the maximum potential difference between the shell 501 of the electric box 500 and the aluminum shell of the battery monomer 600 is about the total voltage between the positive and negative direct current, which will cause the insulating medium at the bottom of the first battery monomer 600 to bear a high field strength. With the continuous improvement of the operating voltage level of the energy storage device, under this clamping scheme, the bottom insulation of the electric box 500 is more prone to partial discharge, insulation aging, electrical treeing and other problems, and gradually develops into an insulation breakdown failure. Therefore, the clamping design not only needs to consider the equipotential of the metal shell, but also needs to select a suitable potential reference point to keep the electric field strength borne by the bottom insulation of the electric box 500 within a safe range.

[0086] Please refer to FIG. 7, as another comparative example, the clamping scheme of FIG. 7 uses two clamping resistors with the same resistance to construct a voltage division clamping point C1, so that the metal shell is clamped at the midpoint of the positive and negative direct current voltage, that is, R11=R21. Therefore, the maximum voltage borne by the bottom insulation of the electric box 700 appears at the bottom of the first battery monomer 800 and the bottom of the last battery monomer 800, and the voltage on both sides of the insulating medium is half of the positive and negative direct current voltage. Compared with the negative clamping of FIG. 6, the resistance voltage division midpoint clamping method of FIG. 7 can reduce the field strength borne by the insulation of the electric box 700, and to some extent, enhance the insulation reliability.

[0087] In the scheme of FIG. 7, when the resistance of the clamping resistor R11=R21, the voltage borne by the bottom insulation of the first battery monomer 800 and the last battery monomer 800 is the same in value, but opposite in polarity. However, the design scheme of FIG. 7 does not take into account the polarity effect of the insulation of the electric box 700, that is, under a non-uniform electric field, the insulation failure process under a positive polarity voltage and a negative polarity voltage is different. In particular, the electric field distortion phenomenon at the R corner of the bottom of the battery monomer 800 can exacerbate the polarity effect.

[0088] Generally, the insulation failure under a non-uniform electric field has a significant polarity effect, which is related to the injection, distribution and accumulation behavior of space charges in mechanism. For example, for a single-layer polymer insulating medium [1] Under a positive polarity voltage, electrical treeing aging occurs more easily than under a negative polarity voltage, and the diffusion range of negative polarity electrical treeing defects is wider; the concentration and injection depth of space charges under a negative polarity are greater than those under a positive polarity; in addition, for a multi-layer insulating medium [2], the space charge accumulated at the interface also has a difference in polarity effect, which is not completely consistent with the polarity rule of single-layer medium. Refs: [1] Li, G. D., Wang, Y. J., Wu, J. D., et al. Experimental and simulation study on the influence of space charge on DC ground treeing [J]. Proceedings of the CSEE, 2017, 37(22): 6749-6756+6788; [2] Huang, M., Li, Y. R., Wu, Y. Y., et al. Nonlinear circuit equivalent model of oil-paper composite insulation considering interface charge and polarity effect [J]. Transactions of Electrical Engineering, 1-12 [2023-10-13].

[0089] Specifically, please refer to Figures 3 and 4, the insulating medium of the electric box 15 of the energy storage module 100 is generally a multi-layer medium formed by bonding the insulating layer 153 of the battery cell 152 (the insulating layer 153 includes but is not limited to polyester, epoxy resin and the like) and the structural adhesive layer 154 (the structural adhesive layer 154 includes but is not limited to polyurethane, silane coupling agent and the like), which has the complex characteristics of single-layer insulation and multi-layer interface. Since the polarity effect usually affects the long-term failure process of insulation, and has relatively weak influence on short-term performance, the industry generally lacks understanding of the polarity rule of insulation failure, and relevant experimental results have not been reported in literature or patents.

[0090] If the polarity effect exists in the long-term insulation of the bottom of the electric box, the space charge injection and accumulation processes on both sides of the clamping point in the electric circuit are not balanced, and insulation aging failure is more likely to occur on one side. This unbalanced state of insulation failure caused by the polarity effect seriously increases the difficulty and cost of insulation parameter design, equipment state monitoring and operation strategy formulation.

[0091] In summary, considering the polarity effect of the insulating medium at the bottom of the electric box, neither clamping to the DC negative pole nor using two identical clamping resistors to construct a voltage dividing clamping point C (R11 = R21) is a better clamping configuration method in theory.

[0092] In the embodiments of the present application, the clamping configuration method considers balancing the polarity effect of the uneven electric field at the bottom of the insulating medium of the electric box 15, introduces the bottom electric field unevenness k E of the battery cell 152 IF , the difference in accumulated charge flux under positive and negative polarity electric field Δj , and the space charge injection flux difference of the insulating layer 153 of the battery cell 152 under positive and negative polarity electric field, to obtain the resistance ratio value of the first clamping resistor 13 and the second clamping resistor 14, the resistance value of the first clamping resistor 13 and the resistance value of the second clamping resistor 14 are not equal, and then the withstanding voltage of the bottom insulation of the battery cell 152 on both sides of the clamping point C can be reasonably configured, so that the space charge characteristics under positive and negative polarity electric field are close to each other, to a certain extent, avoiding the problem of asynchronous insulation failure on both sides of the clamping point C.

[0093] The number of the electric boxes 15 and the battery cells 152 is not specifically limited in the present application. Alternatively, in FIG. 1, one energy storage module 100 includes two electric boxes 15, and a plurality of battery cells 152 in each electric box 15 are connected in series to form a battery module, and a plurality of battery modules of different electric boxes 15 are connected in series. Both of the first casings 151 are connected to the clamping point C. Alternatively, in other embodiments, the plurality of battery cells 152 in each electric box 15 can also be connected in parallel or in a hybrid manner to form a battery module, and the hybrid manner means that the plurality of battery cells 152 are connected in series and in parallel. The plurality of battery modules of different electric boxes 15 are connected in parallel or in a hybrid manner.

[0094] Alternatively, the obtained resistance ratio value of the first clamping resistor 13 and the second clamping resistor 14 can include but is not limited to an optimal resistance ratio value and other desired resistance ratio values.

[0095] According to some embodiments of the present application, the bottom electric field non-uniformity k E is obtained by using the operating voltage of the energy storage module 100, the insulation structure model of the electric box 15, the electrical parameters of the insulation material, and the effective element simulation method.

[0096] Thus, the bottom electric field non-uniformity k E of the battery cell 152 can be obtained.

[0097] The operating voltage of the energy storage module 100, the insulation structure model of the electric box 15, and the electrical parameters of the insulation material can all come from the application object of the clamping configuration method of the present application, i.e., the energy storage module 100 to be optimized and its internal components such as the electric box 15, the battery cell 152, etc. The above parameter values can be used to support the calculation process of the subsequent steps.

[0098] Alternatively, the operating voltage of the energy storage module 100 can refer to the maximum direct current voltage when the energy storage module 100 is stably operated. The insulation structure model of the electric box 15 can be a model formed by modeling the electric box 15, which can be a two-dimensional model or a three-dimensional model. Please refer to FIGS. 3 and 4, the first casing 151 includes a bottom plate 155, and an insulation layer 153 and a structural adhesive layer 154 are arranged between the bottom plate 155 and the casing 156 of the battery cell 152. The insulation structure model of the electric box 15 includes but is not limited to the size of the casing 156 (such as an aluminum casing) of the battery cell 152, the corner radius of the casing 156 of the battery cell 152, the thickness of the insulation layer 153, the thickness of the structural adhesive layer 154, etc.

[0099] The electrical parameters of the insulation material include but are not limited to the relative permittivity of the insulation layer 153 and the relative permittivity of the structural adhesive layer 154.

[0100] The bottom electric field non-uniformity k EThe ratio of the electric field intensity at the bottom corner of the battery cell 152 to the electric field intensity of the bottom flat plate (e.g., the bottom plate 155). Alternatively, the bottom electric field non-uniformity k of the battery cell 152 can be obtained by finite element simulation calculation according to Maxwell's electromagnetic equations as control equations under the direct current conduction field E . Alternatively, the battery cell 152 can be a square battery cell 152.

[0101] According to some embodiments of the present application, the carrier injection flux under the positive polarity electric field is obtained according to the relationship between the carrier injection flux j and the electric field intensity E under the positive polarity electric field, and the bottom electric field non-uniformity k of the battery cell 152 E .

[0102] The carrier injection flux under the negative polarity electric field is obtained according to the relationship between the carrier injection flux j and the electric field intensity E under the negative polarity electric field, and the bottom electric field non-uniformity k of the battery cell 152 E .

[0103] Thus, the carrier injection flux under the positive polarity electric field and the carrier injection flux under the negative polarity electric field can be obtained.

[0104] Specifically, the electron injection barrier W e , the hole injection barrier W h can be input first. The parameters W e and W h are related to the process of bipolar carrier (i.e., electron and hole) injection forming space charge. According to the Schottky injection mechanism, the field emission charge needs to overcome the potential barrier between the electrode and the dielectric. The parameters W e and W h can be obtained by space charge test technology, such as the electro-acoustic pulse measurement method.

[0105] Then, the bipolar carrier injection fluxes j e and j h are calculated.

[0106] Specifically, according to the Richardson-Schottky field emission current theory of bipolar carriers [3] , the relationship between the carrier injection flux j and the electric field intensity E is:

[0107] where A is the Richardson constant, T is the temperature, q is the elementary charge, W is the carrier injection barrier, k B is the Boltzmann constant, and ε ris the relative dielectric constant of the insulating material, and ε0 is the vacuum dielectric constant. Reference: [3] Le R S, Segur P, Teyssedre G, et al. Description of bipolar charge transport in polyethylene using a fluid model with a constant mobility: model prediction [J]. Journal of physics D: Applied Physics, 2003, 37(2): 298.

[0108] According to some embodiments of the present application, the carrier injection flux under the positive polarity electric field includes the hole injection flux under the positive polarity electric field and the electron injection flux under the positive polarity electric field, and the carrier injection flux under the negative polarity electric field includes the hole injection flux under the negative polarity electric field and the electron injection flux under the negative polarity electric field.

[0109] Therefore, the carrier injection flux under the positive polarity electric field and the carrier injection flux under the negative polarity electric field can be obtained through the hole injection flux under the positive polarity electric field, the electron injection flux under the positive polarity electric field, the hole injection flux under the negative polarity electric field, and the electron injection flux under the negative polarity electric field.

[0110] Specifically, the carriers can include holes and electrons, the holes can carry positive charges, and the electrons can carry negative charges.

[0111] The present application improves the above formula (1) and additionally considers the electric field distortion and layered structure at the bottom of the battery monomer 152 (as shown in FIGS. 3 and 4), and introduces the bottom electric field non-uniformity k of the battery monomer 152 E The carrier injection fluxes under the positive and negative polarity electric fields are calculated according to the following formula:

[0112] In the above formula (2)-(7), j h + is the hole injection flux under the positive polarity electric field, j e + is the electron injection flux under the positive polarity electric field, j h - is the hole injection flux under the negative polarity electric field, j e - is the electron injection flux under the negative polarity electric field, ε r1 is the relative dielectric constant of the insulating layer 153 of the battery monomer 152, and ε r2is the relative permittivity of the structural adhesive layer 154. d1 is the thickness of the insulating layer 153 of the battery cell 152, and d2 is the thickness of the structural adhesive layer 154. U dc is the operating voltage of the energy storage module 100. R1 is the resistance value of the first clamping resistor 13, and R2 is the resistance value of the second clamping resistor 14. The insulating structure of the electric box 15 involved in the above model can be conveniently understood in combination with FIGS. 3 and 4.

[0113] According to some embodiments of the present application, the difference Δj IF is the surface area accumulated charge flux j IF + under the positive polarity electric field. IF - is the absolute value of the difference between the surface area accumulated charge flux j

[0114] under the positive polarity electric field. IF + is obtained according to the hole injection flux j h + under the positive polarity electric field. e + ;

[0115] is the surface area accumulated charge flux j IF - under the negative polarity electric field. h - e - is obtained according to the hole injection flux j IF IF + under the negative polarity electric field. h + e + .

[0116] Therefore, the difference Δj IF of the surface area accumulated charge flux under the positive and negative polarity electric fields can be obtained.

[0117] Specifically, the injected holes and electrons are transported inside the medium, and then the space charge is recombined at the interface region between the insulating layer 153 and the adhesive layer. Due to the polarity effect, the injection fluxes of the holes and the electrons are different, so the positive and negative polarity carriers cannot be completely recombined and offset, and the remaining carriers accumulate at the interface, which may cause the interface insulation to fail.

[0118] Optionally, the surface area accumulated charge flux j IF + under the positive polarity electric field can be the absolute value of the difference between the hole injection flux j h + and the electron injection flux j e + under the positive polarity electric field.

[0119] Optionally, the interfacial area charge flux j under a negative electric field IF - The hole injection flux j under a negative electric field can be obtained h - Electron injection flux j under a negative electric field e - The absolute value of the difference.

[0120] The difference in charge flux at the interface under positive and negative polarity electric fields can be represented by Δj. IF As part of the objective function, this difference is optimized to an acceptable level. The acceptable level can be a pre-defined target range; when the difference falls within the target range, it can be considered that the difference has been optimized to an acceptable level.

[0121] The above calculation method includes the following assumptions: under the DC field strength condition of the energy storage module 100, it is assumed that the effects of charge dissipation, impurity ionization, polarization and induced charge in the space charge transport process are negligible; at the same time, it is assumed that the insulating medium processing technology can achieve ideal results, so the blocking effect of internal defects and charge traps on space charge transport is not involved in the polarity effect.

[0122] According to some embodiments of this application, optionally, the space charge injection flux difference Δj between the insulating layer 153 of the battery cell 152 and the negative polarity electric field is... DE It is based on the hole injection flux j under a positive electric field. h + Electron injection flux j under negative electric field e - What was obtained.

[0123] Therefore, the space charge injection flux difference Δj between the insulating layer 153 and the cell 152 under positive and negative polarity electric fields can be determined. DE .

[0124] Specifically, the space charge injection flux difference Δj of the insulating layer 153 of the battery cell 152 DE This reflects the difference in the flux of dominant charge carriers (i.e., majority carriers) under positive and negative polarities. Since the electric field distortion in the insulating layer 153 of the battery cell 152 is more severe than that in the structural adhesive layer 154, the polarity difference of the injected charge within the insulating layer 153 of the battery cell 152 is primarily considered. The injected charge within the insulating layer 153 of the battery cell 152 may lead to insulation failure of the monolayer dielectric.

[0125] Optionally, the space charge injection flux difference Δj between the insulating layer 153 and the cell 152 under positive and negative polarity electric fields. DE The hole injection flux j under a positive electric field can be obtained h+ and the electron injection flux j e - of the absolute value of the difference.

[0126] The difference Δj DE As a result of the calculation, the difference is also optimized to an acceptable level as a component of the optimization objective function. The acceptable level can be a target range set in advance, and when the difference falls within the target range, it can be considered that the difference is optimized to an acceptable level.

[0127] The above calculation method contains the following assumptions: under the working condition of the direct current field strength of the energy storage module 100, it is assumed that the effects of charge dissipation, impurity ionization, polarization and induced charge in the space charge transport process are negligible; at the same time, it is assumed that the insulation medium processing technology can achieve ideal results, so the blocking effect of space charge transmission by internal defects and charge traps in the medium is not involved in the polarity effect.

[0128] According to some embodiments of the present application, the multi-layer interface insulation quality weight w IF and the single-layer medium insulation quality weight w DE satisfy the relationship: w IF +w DE =1.

[0129] Therefore, the multi-layer interface insulation quality weight w IF and the single-layer medium insulation quality weight w DE are limited to each other.

[0130] Specifically, the multi-layer interface insulation quality weight w IF reflects the importance of the insulation quality of the interface between the insulation layer 153 of the battery monomer 152 and the structural adhesive layer 154 in the overall insulation quality of the electric box 15. Optionally, 0<w IF <1; the greater the weight w IF , the lower the acceptance level of the phenomenon that the accumulated charge at the interface destroys the interface insulation.

[0131] The single-layer medium insulation quality weight w DE reflects the importance of the insulation quality of the insulation layer 153 of the battery monomer 152 in the overall insulation quality of the electric box 15. Optionally, 0<w DE <1; the greater the weight w DE , the lower the acceptance level of the phenomenon that the space charge injection destroys the single-layer insulation layer 153. Among them, w IF +w DE =1.

[0132] The above multi-layer interface insulation quality weight wIF and single layer dielectric insulation quality weight w DE will affect the solution process of the optimization objective function. IF and w DE is preset. Optionally, in an embodiment, w IF and w DE The weight assignment can be determined according to the engineering experience of the energy storage project, and can be determined by expert library voting.

[0133] According to some embodiments of the present application, optionally, the resistance ratio value of the first clamping resistor 13 and the second clamping resistor 14 is w IF , Δj IF , w DE , Δj DE form the objective function, which is obtained using an optimization algorithm, wherein w IF represents the multi-layer interface insulation quality weight, w DE represents the single layer dielectric insulation quality weight, Δj IF represents the interface area charge accumulation flux difference, Δj DE represents the space charge injection flux difference.

[0134] Thus, the resistance ratio value of the first clamping resistor 13 and the second clamping resistor 14 can be determined.

[0135] Optionally, in an embodiment, w IF , Δj IF , w DE and Δj DE form the objective function as (w IF ×Δj IF +w DE ×Δj DE ). The resistance ratio value of the first clamping resistor 13 and the second clamping resistor 14 obtained is the optimal resistance ratio value.

[0136] The optimization objective is (w IF ×Δj IF +w DE ×Δj DE ) to reach a set value (such as a minimum value). When the minimum value is reached, its physical meaning is that the difference between the space charge injection and accumulation characteristics under the positive and negative electric fields is minimized, and the influence of the polarity effect on insulation failure reaches a balanced state.

[0137] Optionally, a variety of optimization algorithms can be compared to select the optimization solution with better convergence, including but not limited to dynamic evolution algorithm, neural network algorithm, nonlinear generalized gradient reduction algorithm, simulated annealing algorithm, etc.

[0138] The optimization solution is a resistance ratio value R1:R2 (such as an optimal resistance ratio value) of the first clamping resistor 13 and the second clamping resistor 14, R1 is a resistance value of the first clamping resistor 13, and R2 is a resistance value of the second clamping resistor 14. In addition, the resistance values of R1 and R2 should be in the same order of magnitude, which can be selected as a mega-ohm level (including but not limited to 0.1 MΩ-10 MΩ). The calculation target of the clamping configuration method of the embodiment of the application is the ratio of the resistance value R1 of the first clamping resistor 13 and the resistance value R2 of the second clamping resistor 14, rather than the specific resistance value. The selection of the specific resistance value also involves other factors, such as the insulation monitoring function of the energy storage module 100, which is related to the detailed design of the energy storage module 100 and is not within the scope of discussion of the application.

[0139] Optionally, please refer to one specific embodiment of the application.

[0140] Table 1 input parameter values

[0141] Note: W e and W h The parameter estimation value can come from the literature [4] Test the space charge characteristics of the polyester film material. Reference: [4] Jiang X, Sima W, Chen G, et al. Physicochemical Characteristics and Dynamic Charge Mapping in Thermally Aged Two-Layered Polymer Considering Surface States: Experiment and Simulation [J]. Polymers, 2020, 12(3).

[0142] Substitute each item in Table 1 into the related formula, and use a dynamic evolution algorithm as the optimization algorithm. The convergence criterion is that the variation range of the solution is less than 1% for 5 consecutive times.

[0143] In this embodiment, w IF = 0.2, and w DE = 0.8. The optimal resistance ratio value R1:R2 obtained through optimization is 76:24, and the corresponding positive electrode 11 pair of clamping points C pressure difference is +1 900V, and the negative electrode 12 pair of clamping points C pressure difference is -600V.

[0144] Optionally, the values of the multi-layer interface insulation quality weight w IF and the single-layer medium insulation quality weight w DE can be estimated from actual engineering experience. The optimization results corresponding to different weight assignments are shown in Table 2, and the optimization solution process has good convergence.

[0145] Table 2: Optimization results of resistance ratio value corresponding to different weight assignments

[0146] In summary, the clamping configuration method of the application can at least achieve the following technical effects:

[0147] (1) Adjusting the resistance ratio value of the first clamping resistor 13 and the second clamping resistor 14 without re-designing the internal insulation of the electric box 15, so as to balance the polarity effect and achieve low cost;

[0148] (2) The clamping configuration method has a wide range of applications. When the design operating voltage of the energy storage module 100, the insulation material or structure of the battery monomer 152 changes, the corresponding known parameters are adjusted according to the method of the application, and the updated optimal insulation resistance configuration ratio can still be obtained;

[0149] (3) The input parameters of the calculation model do not need to be obtained by destructive insulation test, the test cost is low, the model parameters are easy to determine, and the accuracy of the input parameters and the calculation results can be verified by space charge test method.

[0150] Secondly, please refer to Figure 5, the embodiment of the application provides an electronic device 200. The electronic device 200 comprises:

[0151] a processor 21, and;

[0152] a memory 22, the memory 22 stores a computer program, and when the computer program is executed by the processor 21, the steps of the clamping configuration method of any of the above embodiments are realized.

[0153] Specifically, the electronic device 200 includes but is not limited to a personal computer, a server (including a cloud server, etc.), a mobile phone, a tablet computer, etc.

[0154] Thirdly, the embodiment of the application provides a computer readable storage medium, which stores a computer program, and when the computer program is executed by the processor 21, the steps of the clamping configuration method of any of the above embodiments are realized.

[0155] In one embodiment, when the computer program is executed by the processor 21, the clamping configuration method comprises:

[0156] 01, obtaining the bottom field non-uniformity k of the battery monomer 152 E ;

[0157] 03, according to the bottom field non-uniformity k of the battery monomer 152 E obtaining the carrier injection flux under the positive polarity electric field and the carrier injection flux under the negative polarity electric field;

[0158] 05, the difference Δj of the surface accumulated charge flux under the positive and negative polarity electric field is obtained according to the carrier injection flux under the positive polarity electric field and the carrier injection flux under the negative polarity electric field IF and the difference Δj of the space charge injection flux of the insulation layer 153 of the battery monomer 152 under the positive and negative polarity electric field DE

[0159] 07, the resistance ratio value of the first and second clamping resistors 13 and 14 is obtained according to the multi-layer interface insulation quality weight w IF and the single-layer dielectric insulation quality weight w DE , the difference Δj of the surface accumulated charge flux IF and the difference Δj of the space charge injection flux DE

[0160] In a fourth aspect, the embodiments of the present application provide an energy storage module 100. The energy storage module 100 includes a positive electrode 11, a negative electrode 12, a first clamping resistor 13, a second clamping resistor 14 and an electric box 15, the electric box 15 includes a first shell 151 and a battery monomer 152, the battery monomer 152 is located in the first shell 151, the first clamping resistor 13 and the second clamping resistor 14 are connected in series, one end of the first clamping resistor 13 is connected to the positive electrode 11, one end of the second clamping resistor 14 is connected to the negative electrode 12, a clamping point C of the energy storage module 100 is connected to the other end of the first clamping resistor 13 and the other end of the second clamping resistor 14, and the first shell 151 is connected to the clamping point C. The resistance ratio value of the first clamping resistor 13 and the second clamping resistor 14 is determined by the clamping configuration method of any of the above embodiments.

[0161] Since the resistance value of the first clamping resistor 13 and the resistance value of the second clamping resistor 14 are not equal, the energy storage module 100 can avoid the problem of asynchronous insulation failure on both sides of the clamping point C to a certain extent.

[0162] According to some embodiments of the present application, the energy storage module 100 further includes a master control box 16 and an electric cabinet 17, the master control box 16 includes a second shell 161, the electric cabinet 17 includes a third shell 171, the energy storage module 100 is located in the third shell 171, the second shell 161 is connected to the clamping point C, and the first shell 151 is connected to the second shell 161 through the third shell 171.

[0163] Thus, the first shell 151, the second shell 161 and the third shell 171 can be at the same potential.

[0164] ​​Optionally, the first shell 151, the second shell 161 and the third shell 171 can be metal shells, the second shell 161 is connected to the clamping point C, and the first shell 151 is connected to the second shell 161 through the third shell 171, so that the first shell 151 can be connected to the clamping point C through the second shell 161 and the third shell 171.

[0165] The first shell 151, the second shell 161 and the third shell 171 can be connected in a manner including but not limited to wire, welding or bolt locking.

[0166] Optionally, referring to FIG. 1, the main control box 16 includes the first switch S1, the second switch S2 and the third switch S3 and the pre-charge resistor R located in the second shell 161. The third switch S3 can be a pre-charge switch.

[0167] The first switch S1 is connected in series with the positive electrode 11, the third switch S3 and the pre-charge resistor R are connected in series and then connected in parallel with the first switch S1, that is, the third switch S3 and the pre-charge resistor R connected in series are connected in parallel with the first switch S1. The second switch S2 is connected in series with the negative electrode 12. The third switch S3 is closed during the pre-charge process, and the pre-charge resistor R can play a role of current limiting. After the pre-charge is completed, the first switch S1 and the second switch S2 are closed.

[0168] According to some embodiments of the present application, optionally, the resistance value of the first clamping resistor 13 is greater than the resistance value of the second clamping resistor 14.

[0169] Please combine FIG. 1, FIG. 3 and FIG. 4, according to the field emission theory, electron injection is easier than hole injection (low potential barrier), specifically, according to the above formula 1, W is the carrier injection potential barrier. Please combine Table 1, the W values of electrons and holes are different, according to the test data of document 4, We (electron) is less than Wh (hole), so that the calculated resistance value R2 of the second clamping resistor 14 is smaller. Therefore, the resistance value of the first clamping resistor 13 is greater than the resistance value of the second clamping resistor 14, which meets the configuration (including structure and material) of the energy storage module of the embodiments of the present application.

[0170] The resistance value of the first clamping resistor 13 is R1, the resistance value of the second clamping resistor 14 is R2, and R1>R2, which can make R1 and R2 meet the configuration of the energy storage module of the present application, and further avoid the problem of asynchronous insulation failure on both sides of the clamping point to a certain extent.

[0171] According to some embodiments of the present application, optionally, the resistance value ratio of the first clamping resistor 13 and the second clamping resistor 14 ranges from (5:5, 8:2].

[0172] In some examples, the resistance ratio value R1:R2 of the first clamping resistor 13 and the second clamping resistor 14 is 1.1, 1.5, 2, 2.5, 3, 3.5, 4 (8:2) or other values in the range of (5:5, 8:2].

[0173] For the resistance ratio value in the range of (5:5, 8:2], for the lower limit value 8:2 or other ratio values close to the lower limit value, the resistance value R2 of the second clamping resistor 14 is not too small, thereby avoiding too sensitive changes in the resistance value due to production deviation of the resistor to a certain extent.

[0174] In a fifth aspect, the embodiments of the present application provide a storage module 100. The storage module 100 includes a positive electrode 11, a negative electrode 12, a first clamping resistor 13, a second clamping resistor 14, and an electric box 15. The electric box 15 includes a first shell 151 and a battery monomer 152. The battery monomer 152 is located in the first shell 151. The first clamping resistor 13 and the second clamping resistor 14 are connected in series. One end of the first clamping resistor 13 is connected to the positive electrode 11. One end of the second clamping resistor 14 is connected to the negative electrode 12. The clamping point C of the storage module 100 is connected to the other end of the first clamping resistor 13 and the other end of the second clamping resistor 14. The first shell 151 is connected to the clamping point C. The resistance value of the first clamping resistor 13 and the resistance value of the second clamping resistor 14 are not equal.

[0175] The resistance value of the first clamping resistor 13 and the resistance value of the second clamping resistor 14 are not equal, thereby making the space charge characteristics under the positive and negative polarity field strengths close to be consistent, and avoiding the problem of asynchronous insulation failure on both sides of the clamping point to a certain extent.

[0176] Optionally, in an embodiment, in the case that the resistance value of the first clamping resistor 13 is greater than the resistance value of the second clamping resistor 14, the resistance ratio value of the first clamping resistor 13 and the second clamping resistor 14 can be set according to experience. Optionally, the resistance ratio value of the first clamping resistor 13 and the second clamping resistor 14 ranges from (5:5, 8:2].

[0177] Optionally, in an embodiment, the resistance ratio value of the first clamping resistor 13 and the second clamping resistor 14 can be set according to the clamping configuration method of the embodiments of the present application.

[0178] In a sixth aspect, the embodiments of the present application provide a storage device. The storage device includes the storage module 100 of any of the above embodiments.

[0179] The storage device can include one or more storage modules 100. The plurality of storage modules 100 can be electrically connected in series, in parallel, or in a hybrid manner. The storage device can include, but is not limited to, a storage container.

[0180] Since the resistance ratio value of the first clamping resistor 13 and the second clamping resistor 14 is determined by the clamping configuration method of any of the above embodiments, the energy storage device can avoid the problem of asynchronous insulation failure on both sides of the clamping point C to a certain extent.

[0181] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A clamping configuration method for an energy storage module, characterized in that, The energy storage module includes a positive electrode, a negative electrode, a first clamping resistor, a second clamping resistor, and an electrical box. The electrical box includes a first housing and a battery cell. The battery cell is located inside the first housing. The first clamping resistor and the second clamping resistor are connected in series. One end of the first clamping resistor is connected to the positive electrode, and one end of the second clamping resistor is connected to the negative electrode. The clamping point of the energy storage module is connected to the other end of the first clamping resistor and the other end of the second clamping resistor. The first housing is connected to the clamping point. The clamp configuration method includes: Obtain the bottom electric field non-uniformity of the battery cell; The carrier injection flux under a positive electric field and the carrier injection flux under a negative electric field are obtained based on the bottom electric field non-uniformity of the battery cell. The difference in interfacial charge injection flux under positive and negative electric fields and the difference in space charge injection flux of the insulating layer of a single battery cell under positive and negative electric fields are obtained based on the carrier injection flux under the positive electric field and the carrier injection flux under the negative electric field. The resistance ratio of the first clamping resistor and the second clamping resistor is obtained based on the multilayer interface insulation quality weight and the single-layer dielectric insulation quality weight, the difference in the surface charge flux at the interface, and the difference in the space charge injection flux.

2. The clamping configuration method according to claim 1, characterized in that, The non-uniformity of the bottom electric field of the battery cell is obtained using the operating voltage of the energy storage module, the insulation structure model of the electrical box, the electrical parameters of the insulation material, and the effective element simulation method.

3. The clamping configuration method according to claim 1 or 2, characterized in that, The carrier injection flux under the positive polarity electric field is obtained based on the relationship between the carrier injection flux and the electric field strength under the positive polarity electric field, as well as the bottom electric field non-uniformity of the battery cell. The carrier injection flux under the negative polarity electric field is obtained based on the relationship between the carrier injection flux and the electric field strength under the negative polarity electric field, as well as the bottom electric field non-uniformity of the battery cell.

4. The clamping configuration method according to claim 3, characterized in that, The carrier injection flux under the positive electric field includes the hole injection flux and the electron injection flux under the positive electric field, and the carrier injection flux under the negative electric field includes the hole injection flux and the electron injection flux under the negative electric field.

5. The clamping configuration method according to any one of claims 1-4, characterized in that, The difference in interfacial area charge flux under positive and negative electric fields is the absolute value of the difference between the interfacial area charge flux under positive and negative electric fields. The interfacial charge flux under the positive electric field is obtained from the hole injection flux and the electron injection flux under the positive electric field. The interfacial charge flux under the negative electric field is obtained from the hole injection flux and the electron injection flux under the negative electric field.

6. The clamping configuration method according to any one of claims 1-5, characterized in that, The difference in space charge injection flux of the battery cell insulation layer under positive and negative electric fields is obtained based on the hole injection flux under the positive electric field and the electron injection flux under the negative electric field.

7. The clamping configuration method according to any one of claims 1-6, characterized in that, The multilayer interface insulation quality weight and the single-layer dielectric insulation quality weight satisfy the following relationship: w IF +w DE =1, where w IF w represents the quality weight of the multilayer interface insulation. DE This represents the quality weight of the single-layer dielectric insulation.

8. The clamping configuration method according to any one of claims 1-7, characterized in that, The ratio of the resistance values ​​of the first clamping resistor and the second clamping resistor is expressed in W. IF , Δj IF w DE and Δj DE The objective function is formed using an optimization algorithm, where w IF w represents the quality weight of the multilayer interface insulation. DE The quality weight of the single-layer dielectric insulation is represented by Δj. IF The difference in charge flux accumulated at the interface is represented by Δj. DE This indicates the difference in space charge injection flux.

9. An electronic device, characterized in that, include: Processor, and; A memory storing a computer program that, when executed by the processor, implements the steps of the clamping configuration method according to any one of claims 1-8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the clamping configuration method according to any one of claims 1-8.

11. An energy storage module, characterized in that, The device includes a positive electrode, a negative electrode, a first clamping resistor, a second clamping resistor, and an electrical box. The electrical box includes a first housing and a battery cell. The battery cell is located inside the first housing. The first clamping resistor and the second clamping resistor are connected in series. One end of the first clamping resistor is connected to the positive electrode, and one end of the second clamping resistor is connected to the negative electrode. The clamping point of the energy storage module is connected to the other end of the first clamping resistor and the other end of the second clamping resistor. The first housing is connected to the clamping point. The resistance ratio of the first clamping resistor and the second clamping resistor is determined by the clamping configuration method according to any one of claims 1-8.

12. The energy storage module according to claim 11, characterized in that, The energy storage module also includes a main control box and an electrical cabinet. The main control box includes a second housing, and the electrical cabinet includes a third housing. The energy storage module is located inside the third housing. The second housing is connected to the clamping point, and the first housing is connected to the second housing through the third housing.

13. The energy storage module according to claim 11 or 12, characterized in that, The resistance value of the first clamping resistor is greater than the resistance value of the second clamping resistor.

14. The energy storage module according to any one of claims 11-13, characterized in that, The resistance ratio of the first clamping resistor and the second clamping resistor is in the range of (5:5, 8:2).

15. An energy storage module, characterized in that, The device includes a positive electrode, a negative electrode, a first clamping resistor, a second clamping resistor, and an electrical box. The electrical box includes a first housing and a battery cell. The battery cell is located inside the first housing. The first clamping resistor and the second clamping resistor are connected in series. One end of the first clamping resistor is connected to the positive electrode, and one end of the second clamping resistor is connected to the negative electrode. The clamping point of the energy storage module is connected to the other end of the first clamping resistor and the other end of the second clamping resistor. The first housing is connected to the clamping point. The resistance values ​​of the first clamping resistor and the second clamping resistor are not equal.

16. The energy storage module according to claim 15, characterized in that, The energy storage module also includes a main control box and an electrical cabinet. The main control box includes a second housing, and the electrical cabinet includes a third housing. The energy storage module is located inside the third housing. The second housing is connected to the clamping point, and the first housing is connected to the second housing through the third housing.

17. The energy storage module according to claim 15 or 16, characterized in that, The resistance value of the first clamping resistor is greater than the resistance value of the second clamping resistor.

18. The energy storage module according to any one of claims 15-17, characterized in that, The resistance ratio of the first clamping resistor and the second clamping resistor is in the range of (5:5, 8:2).

19. An energy storage device, characterized in that, Includes the energy storage module as described in any one of claims 11-18.

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