A pressure release management method, system and storage medium for a battery structure

Abstract

The present invention provides a pressure release management method, system and storage medium for a battery structure. First, first voltage information is obtained. When it is determined that the first voltage information exceeds a preset first voltage threshold, the working state of a pressure relief valve at a corresponding position is controlled according to the position indicated by the first voltage information to achieve a pressure release effect. Then, first pressure switch information is obtained. When it is determined that the first pressure switch information is in a disconnected state, the working state of a locking relay is switched to unlock the battery cell, thereby reducing the risk of damage to the battery cell due to failure to release pressure. The present invention controls the working state of the pressure relief valve at each position to reduce the pressure in the battery cavity, reduce the risk of damage caused by expansion of the battery cell, and increase the service life of the battery. The locking relay is also used to prevent the risk of damage to the battery due to excessive pressure in the battery cavity, thereby improving the safety of battery use.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and more specifically, to a pressure release management method, system and storage medium for a battery structure. Background Art

[0002] As a core IT equipment, UPS (Uninterruptible Power Supply) plays a vital role in ensuring the power supply security required for the normal operation of the data center. When the power grid encounters various faults, UPS outputs high-quality power through the configured battery and AC inverter to avoid data loss or task interruption caused by power outage.

[0003] UPS usually consists of several stacked battery modules fixed in a cavity with a set space. However, due to heat and deformation of the battery during operation, or collision or vibration during transportation, the pressure between the cavity and the battery module changes. When the battery is out of control due to heating, short circuit or external force, the cavity is affected by the expansion force of the battery cell. If the pressure inside the cavity cannot be released in time, there is a risk of damaging the battery cell, affecting the battery life, and even causing fire or explosion. Therefore, there is an urgent need for a pressure release management technology for the battery structure that can automatically adjust the battery cavity pressure of the UPS. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a pressure release management method, system and storage medium for a battery structure, which can determine that a pressure release operation is needed based on the pressure information of the battery cavity, and then control the working state of the pressure relief valve at the corresponding position according to the pressure information of the cavity, so as to achieve the effect of regulating the pressure of the battery cavity; in addition, according to the state of the pressure switch, when it is determined that the pressure switch is in a disconnected state, the battery module is unlocked by switching the locking relay, thereby reducing the risk of damage to the battery cell due to the inability to release pressure; the present invention reduces the pressure of the battery cavity by controlling the working state of the pressure relief valve at each position, reduces the risk of damage caused by expansion of the battery cell, and increases the service life of the battery, and also prevents the risk of damage to the battery due to excessive pressure in the battery cavity by locking the relay, thereby improving the safety of battery use.

[0005] A first aspect of the present invention provides a pressure release management method for a battery structure, the method comprising:

[0006] obtaining first pressure information;

[0007] Determining whether the first pressure information is greater than a preset first pressure threshold;

[0008] If yes, controlling the working state of the pressure relief valve according to the first pressure information;

[0009] Obtaining first pressure switch information;

[0010] Determining whether the first pressure switch information is in a disconnected state;

[0011] If so, switch the working state of the locking relay.

[0012] This plan also includes:

[0013] Draw a coordinate system using the length and width of the battery structure as coordinate axes respectively;

[0014] Obtaining first coordinate information according to position information of the pressure sensor in the coordinate system;

[0015] A first pressure array is obtained according to the first pressure information and the first coordinate information.

[0016] In this solution, the working state of the pressure relief valve is controlled according to the first pressure information, specifically:

[0017] Determining first quantity information according to the first pressure information;

[0018] Get the first coordinate information;

[0019] Determine second coordinate information according to the first coordinate information;

[0020] According to the second coordinate information, the pressure relief valve at the corresponding position is switched to an on state.

[0021] This plan also includes:

[0022] Calculating and obtaining second pressure information according to the first pressure array and a preset time period;

[0023] Obtaining a first pressure sequence according to the second pressure information;

[0024] determining first slope information according to the first pressure sequence;

[0025] Determining whether the first slope information exceeds a preset first slope threshold;

[0026] If so, switch all the pressure relief valves to the on state.

[0027] In this solution, the first slope information is determined according to the first pressure sequence, specifically:

[0028] According to the first pressure sequence, a fitting curve expression and a first correlation coefficient are obtained according to a preset curve fitting equation;

[0029] Determining whether the first correlation coefficient is greater than a preset correlation coefficient threshold;

[0030] If yes, then according to the curve expression and the derivation rule, the slope value of the last position in the first pressure sequence is obtained as the first slope information;

[0031] If not, change the curve fitting equation.

[0032] In this solution, the first slope information is determined according to the first pressure sequence, specifically:

[0033] Obtaining third coordinate information according to the first pressure sequence;

[0034] Drawing a pressure curve according to the third coordinate information;

[0035] According to the pressure curve, a tangent line is drawn according to the third coordinate information of the farthest position of the horizontal coordinate;

[0036] First slope information is obtained according to the tangent line.

[0037] A second aspect of the present invention provides a pressure release management system for a battery structure, including a pressure release management method program for a battery structure, wherein the pressure release management method program for a battery structure implements the following steps when executed by the processor:

[0038] obtaining first pressure information;

[0039] Determining whether the first pressure information is greater than a preset first pressure threshold;

[0040] If yes, controlling the working state of the pressure relief valve according to the first pressure information;

[0041] Obtaining first pressure switch information;

[0042] Determining whether the first pressure switch information is in a disconnected state;

[0043] If so, switch the working state of the locking relay.

[0044] In this solution, the working state of the pressure relief valve is controlled according to the first pressure information, specifically:

[0045] Determining first quantity information according to the first pressure information;

[0046] Get the first coordinate information;

[0047] Determine second coordinate information according to the first coordinate information;

[0048] According to the second coordinate information, the pressure relief valve at the corresponding position is switched to an on state.

[0049] This plan also includes:

[0050] Calculating and obtaining second pressure information according to the first pressure array and a preset time period;

[0051] Obtaining a first pressure sequence according to the second pressure information;

[0052] determining first slope information according to the first pressure sequence;

[0053] Determining whether the first slope information exceeds a preset first slope threshold;

[0054] If so, switch all the pressure relief valves to the on state.

[0055] A third aspect of the present invention provides a computer-readable storage medium, which includes a battery structure pressure release management method program. When the battery structure pressure release management method program is executed by a processor, the steps of the battery structure pressure release management method as described in any one of the above items are implemented.

[0056] The present invention provides a pressure release management method, system and storage medium for a battery structure. First, first voltage information is obtained. When it is determined that the first voltage information exceeds a preset first voltage threshold, the working state of a pressure relief valve at a corresponding position is controlled according to the position indicated by the first voltage information to achieve a pressure release effect. Then, first pressure switch information is obtained. When it is determined that the first pressure switch information is in a disconnected state, the working state of a locking relay is switched to unlock the battery cell, thereby reducing the risk of damage to the battery cell due to failure to release pressure. The present invention controls the working state of the pressure relief valve at each position to reduce the pressure in the battery cavity, reduce the risk of damage caused by expansion of the battery cell, and increase the service life of the battery. The locking relay is also used to prevent the risk of damage to the battery due to excessive pressure in the battery cavity, thereby improving the safety of battery use. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and should not be regarded as limiting the scope.

[0058] Figure 1 A flow chart showing a pressure release management method for a battery structure of the present invention;

[0059] Figure 2 A flow chart of positioning a pressure relief valve provided by an embodiment of the present invention is shown;

[0060] Figure 3 A control flow chart of a pressure relief valve provided by an embodiment of the present invention is shown;

[0061] Figure 4A block diagram of a pressure release management system for a battery structure of the present invention is shown. DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless the embodiments of the present invention are explicitly defined in this way.

[0064] The words "first", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "one", "an" or "the" and similar words do not indicate a quantity limitation, but indicate the existence of at least one. Similarly, words such as "include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The steps before or after the method of the embodiment of the present invention are not necessarily carried out in order. On the contrary, various steps can be processed in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or a step or several steps can be removed from these processes.

[0065] In addition, the functional modules in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0066] Figure 1 A flow chart of a pressure release management method for a battery structure of the present invention is shown.

[0067] like Figure 1 As shown, the first aspect of the present invention discloses a pressure release management method for a battery structure, the method comprising:

[0068] S102, obtaining first pressure information;

[0069] S104, determining whether the first pressure information is greater than a preset first pressure threshold;

[0070] S106, if yes, controlling the working state of the pressure relief valve according to the first pressure information;

[0071] S108, obtaining first pressure switch information;

[0072] S110, determining whether the first pressure switch information is in a disconnected state;

[0073] S112, if yes, switch the working state of the locking relay.

[0074] It should be noted that in UPS, battery modules are usually arranged in a matrix and located on the same plane in the shell. Several pressure sensors are set in the cavity to detect the force of the battery on the cavity; and several pressure relief valves are set on the cavity to reduce the force between the cavity and the battery. The first pressure information is the pressure value detected by the pressure sensor that detects the effect of the battery on the cavity; the pressure relief valve includes an on state and a closed state, wherein the force between the cavity and the battery can be reduced when in the on state; the first pressure switch information is the state of the set safety switch; the locking relay is used to control the fixed state of the battery and the cavity, wherein, when in the off state, there is no mutual squeezing force between the battery and the cavity.

[0075] In this embodiment, first, the pressure values ​​of each pressure sensor in the cavity, that is, the first pressure information, are collected; when any of the first pressure information exceeds the preset first pressure threshold, it means that the force between the battery at the position of the pressure sensor and the cavity is too large, and a pressure release operation is required. As another embodiment, the pressure change in the cavity is reflected according to the pressure values ​​of each pressure sensor in the cavity; when the pressure change in the cavity conforms to the set pressure trend, it is also determined that a pressure release operation is required. When the pressure release operation needs to be performed, the position of the corresponding pressure relief valve is located according to the position of the pressure sensor; the pressure relief valve at the corresponding position is controlled to achieve the effect of accurately regulating the force between individual batteries and the shell in the cavity; reduce the pressure in the battery cavity, reduce the risk of damage caused by the expansion of the battery cell, and increase the service life of the battery. Then, it is also determined whether the first pressure switch information is in a disconnected state. If so, it means that the force between the cavity and the battery has exceeded the set insurance range, so that the insurance switch is in a disconnected state. At this time, the working state of the locking relay is switched to unlock the battery cell, reducing the risk of damage to the battery cell due to inability to release pressure; thereby preventing the risk of battery damage caused by excessive pressure in the battery cavity through the locking relay, thereby improving the safety of battery use.

[0076] According to an embodiment of the present invention, it also includes:

[0077] Draw a coordinate system using the length and width of the battery structure as coordinate axes respectively;

[0078] Obtaining first coordinate information according to position information of the pressure sensor in the coordinate system;

[0079] A first pressure array is obtained according to the first pressure information and the first coordinate information.

[0080] It should be noted that the battery module matrix located in the same plane in the UPS is identified as a battery structure, and the length direction and width direction of the battery structure are used as the horizontal axis and the vertical axis to draw a coordinate system. According to the position of the pressure sensor in the coordinate system, the coordinate points of each pressure sensor are determined, that is, the first coordinate information. Finally, according to the pressure values ​​measured by each pressure sensor, combined with the corresponding coordinate points, the first pressure array is obtained to represent the force between the battery in the cavity and the shell.

[0081] Figure 2 A positioning flow chart of a pressure relief valve provided in an embodiment of the present invention is shown.

[0082] According to an embodiment of the present invention, Figure 2 As shown, the working state of the pressure relief valve is controlled according to the first pressure information, specifically:

[0083] S202, determining first quantity information according to the first pressure information;

[0084] S204, obtaining first coordinate information;

[0085] S206, determining second coordinate information according to the first coordinate information;

[0086] S208: Switch the pressure relief valve at the corresponding position to an on state according to the second coordinate information.

[0087] It should be noted that the first quantity information is the number of pressure relief valves that need to be switched to the on state; the second coordinate information is the coordinate of the pressure relief valve that needs to be switched to the on state. First, the first pressure information of the pressure sensor is used to obtain the first quantity information, that is, the number of pressure relief valves that need to be switched to the on state, according to the set pressure relief capacity of the pressure relief valve. Then, based on the coordinate information of the pressure sensor, the coordinates of the pressure relief valve are queried outward with the first coordinate information as the origin, based on the principle of minimum distance, to obtain the second coordinate information. Finally, the control code corresponding to the pressure relief valve is obtained according to the second coordinate information, and the corresponding pressure relief valve is switched to the on state according to the code, thereby releasing the pressure. In this embodiment, the number of pressure relief valves switched to the on state is obtained according to the pressure value, and the pressure relief valve at the corresponding position is located according to the position of the pressure sensor, thereby improving the accuracy of the pressure relief operation.

[0088] Figure 3 A control flow chart of a pressure relief valve provided by an embodiment of the present invention is shown.

[0089] According to an embodiment of the present invention, Figure 3 As shown, it also includes:

[0090] S302, calculating and obtaining second pressure information according to the first pressure array and a preset time period;

[0091] S304, obtaining a first pressure sequence according to the second pressure information;

[0092] S306, determining first slope information according to the first pressure sequence;

[0093] S308, determining whether the first slope information exceeds a preset first slope threshold;

[0094] S310: If yes, all the pressure relief valves are switched to the on state.

[0095] It should be noted that the second pressure information is the sum of the pressure values ​​of all pressure sensors at any time; the first pressure sequence is a record of the second pressure information obtained according to a preset time period; the first slope information is the slope value of the position of the latest second pressure information in the pressure change trend obtained from the first pressure sequence. In practical applications, there is a problem that the pressure value of a single sensor does not exceed the pressure threshold, but the overall pressure value continues to rise; therefore, this embodiment is based on the sum of the pressure values ​​of all pressure sensors and the change trend of the sum of the pressure values. If it is judged that the pressure value in the cavity is in a continuously rising state, all pressure relief valves are switched to the on state to achieve the effect of timely pressure relief.

[0096] In this embodiment, the first pressure information is collected according to a preset time period to calculate the second pressure information. Then, according to the order of collection, the information is recorded and summarized into a first pressure sequence. According to the first pressure sequence, the slope of the position of the most recently acquired second pressure information is obtained according to the set curve fitting method or coordinate drawing method, that is, the first slope information. Among them, the first slope information represents the changing trend of the total pressure in the cavity, that is, the larger the slope value, the faster the pressure value rises. When the first slope information exceeds the preset first slope threshold, in order to control the extrusion force of the battery cell within a safe range, this embodiment reduces the risk of damage to the battery cell by means of all pressure relief valves in the channel.

[0097] According to an embodiment of the present invention, it also includes:

[0098] The determining of the first slope information according to the first pressure sequence is specifically:

[0099] According to the first pressure sequence, a fitting curve expression and a first correlation coefficient are obtained according to a preset curve fitting equation;

[0100] Determining whether the first correlation coefficient is greater than a preset correlation coefficient threshold;

[0101] If yes, then according to the curve expression and the derivation rule, the slope value of the last position in the first pressure sequence is obtained as the first slope information;

[0102] If not, change the curve fitting equation.

[0103] It should be noted that, as an implementation method, this embodiment obtains the first slope information by a curve fitting method. Take the linear regression least squares method as an example:

[0104] The fitted straight line is: ;

[0105] The fitted slope is: ;

[0106] The fitted intercept is: ;

[0107] Where:

[0108] is the index number of the first pressure sequence;

[0109] is the second pressure information in the first pressure sequence;

[0110] is the average value of the index number in the first pressure sequence;

[0111] is the average value of the second pressure information in the first pressure sequence;

[0112] represents the summation symbol;

[0113] According to the fitting formula of the above linear regression, the fitting curve / fitting line can be obtained, and then according to the mathematical derivation rule, the slope value of the latest second pressure information position in the sequence can be obtained. At the same time, the first correlation coefficient is obtained through the fitting rule to indicate the degree of correlation of the fitting. In practical applications, when the correlation coefficient exceeds 0.99, it is determined that the correlation of the fitting curve / fitting line is strong, and the fitting curve / fitting line can be used to calculate the slope; if the correlation coefficient is less than 0.99, the fitting formula is changed and the first pressure sequence is refitted.

[0114] According to an embodiment of the present invention, determining the first slope information according to the first pressure sequence is specifically:

[0115] Obtaining third coordinate information according to the first pressure sequence;

[0116] Drawing a pressure curve according to the third coordinate information;

[0117] According to the pressure curve, a tangent line is drawn according to the third coordinate information of the farthest position of the horizontal coordinate;

[0118] First slope information is obtained according to the tangent line.

[0119] It should be noted that, as an implementation method, this embodiment determines the slope of the most recently acquired second pressure information position, i.e., the first slope information, by means of coordinate drawing. In this embodiment, the sequence index number is used as the horizontal coordinate, and the second pressure information in the first pressure sequence is used as the vertical coordinate to obtain the third coordinate information. Then, the pressure curve is drawn according to the third coordinate information. Finally, the tangent of the pressure curve is drawn at the third coordinate information with the largest index number, and the first slope information is obtained according to the slope of the tangent.

[0120] It is worth mentioning that it also includes:

[0121] obtaining second pressure information;

[0122] Determining whether the second pressure information is within a preset first pressure range;

[0123] If yes, obtain the first slope information;

[0124] Determining whether the first slope information is lower than a preset second slope threshold;

[0125] If so, the working state of the pressure relief valve is controlled according to the second pressure information.

[0126] It should be noted that in this embodiment, when the sum of the pressure values ​​in the cavity is within the preset first pressure range, it means that the pressure value in the cavity poses a low risk of squeezing the battery cell. At this time, the slope of the pressure change trend, i.e., the first slope information, is obtained. When the first slope information is lower than the preset second slope threshold, it means that the pressure in the cavity is gradually decreasing. Therefore, part of the pressure relief valve can be gradually closed according to the second pressure information. By closing the pressure relief valve, the movable space of the battery is limited, reducing the risk of the battery falling out of the set position.

[0127] It is worth mentioning that it also includes:

[0128] Determining whether the first pressure information exceeds a preset second pressure threshold;

[0129] If yes, obtain the first coordinate information;

[0130] Determine the battery number information according to the first coordinate information;

[0131] A first abnormal instruction is sent according to the battery number information.

[0132] It should be noted that when the first pressure information exceeds the preset second pressure threshold, it means that the pressure value is higher than the safety range and the battery is at risk of swelling and damage. At this time, the battery number is located and queried according to the first coordinate information of the pressure sensor. Finally, the first abnormal instruction is generated according to the battery number and sent to the background to improve the maintenance efficiency of the maintenance personnel.

[0133] It is worth mentioning that it also includes:

[0134] When it is determined that the first pressure switch information is in a disconnected state;

[0135] Control the power supply relay to disconnect the power supply channel.

[0136] It should be noted that when the first pressure switch information is in the disconnected state, it means that the safety switch has been disconnected. At this time, the working state of the locking relay is switched to unlock the battery cell, reducing the risk of damage to the battery cell due to the inability to release pressure; thereby preventing the risk of damage to the battery due to excessive pressure in the battery cavity by locking the relay, thereby improving the safety of battery use. In addition, the power supply channel of the battery is disconnected by switching the state of the power supply relay to avoid damage to electrical equipment.

[0137] Figure 4 A block diagram of a pressure release management system for a battery structure of the present invention is shown.

[0138] like Figure 4 As shown, the second aspect of the present invention discloses a pressure release management system 4 for a battery structure, comprising a memory 41 and a processor 42, wherein the memory comprises a pressure release management method program for the battery structure, and when the pressure release management method program for the battery structure is executed by the processor, the following steps are implemented:

[0139] obtaining first pressure information;

[0140] Determining whether the first pressure information is greater than a preset first pressure threshold;

[0141] If yes, controlling the working state of the pressure relief valve according to the first pressure information;

[0142] Obtaining first pressure switch information;

[0143] Determining whether the first pressure switch information is in a disconnected state;

[0144] If so, switch the working state of the locking relay.

[0145] It should be noted that in UPS, battery modules are usually arranged in a matrix and located on the same plane in the shell. Several pressure sensors are set in the cavity to detect the force of the battery on the cavity; and several pressure relief valves are set on the cavity to reduce the force between the cavity and the battery. The first pressure information is the pressure value detected by the pressure sensor that detects the effect of the battery on the cavity; the pressure relief valve includes an on state and a closed state, wherein the force between the cavity and the battery can be reduced when in the on state; the first pressure switch information is the state of the set safety switch; the locking relay is used to control the fixed state of the battery and the cavity, wherein, when in the off state, there is no mutual squeezing force between the battery and the cavity.

[0146] In this embodiment, first, the pressure values ​​of each pressure sensor in the cavity, that is, the first pressure information, are collected; when any of the first pressure information exceeds the preset first pressure threshold, it means that the force between the battery at the position of the pressure sensor and the cavity is too large, and a pressure release operation is required. As another embodiment, the pressure change in the cavity is reflected according to the pressure values ​​of each pressure sensor in the cavity; when the pressure change in the cavity conforms to the set pressure trend, it is also determined that a pressure release operation is required. When the pressure release operation needs to be performed, the position of the corresponding pressure relief valve is located according to the position of the pressure sensor; the pressure relief valve at the corresponding position is controlled to achieve the effect of accurately regulating the force between individual batteries and the shell in the cavity; reduce the pressure in the battery cavity, reduce the risk of damage caused by the expansion of the battery cell, and increase the service life of the battery. Then, it is also determined whether the first pressure switch information is in a disconnected state. If so, it means that the force between the cavity and the battery has exceeded the set insurance range, so that the insurance switch is in a disconnected state. At this time, the working state of the locking relay is switched to unlock the battery cell, reducing the risk of damage to the battery cell due to inability to release pressure; thereby preventing the risk of battery damage caused by excessive pressure in the battery cavity through the locking relay, thereby improving the safety of battery use.

[0147] According to an embodiment of the present invention, it also includes:

[0148] Draw a coordinate system using the length and width of the battery structure as coordinate axes respectively;

[0149] Obtaining first coordinate information according to position information of the pressure sensor in the coordinate system;

[0150] A first pressure array is obtained according to the first pressure information and the first coordinate information.

[0151] It should be noted that the battery module matrix located in the same plane in the UPS is identified as a battery structure, and the length direction and width direction of the battery structure are used as the horizontal axis and the vertical axis to draw a coordinate system. According to the position of the pressure sensor in the coordinate system, the coordinate points of each pressure sensor are determined, that is, the first coordinate information. Finally, according to the pressure values ​​measured by each pressure sensor, combined with the corresponding coordinate points, the first pressure array is obtained to represent the force between the battery in the cavity and the shell.

[0152] According to an embodiment of the present invention, controlling the working state of the pressure relief valve according to the first pressure information is specifically:

[0153] Determining first quantity information according to the first pressure information;

[0154] Get the first coordinate information;

[0155] Determine second coordinate information according to the first coordinate information;

[0156] According to the second coordinate information, the pressure relief valve at the corresponding position is switched to an on state.

[0157] It should be noted that the first quantity information is the number of pressure relief valves that need to be switched to the on state; the second coordinate information is the coordinate of the pressure relief valve that needs to be switched to the on state. First, the first pressure information of the pressure sensor is used to obtain the first quantity information, that is, the number of pressure relief valves that need to be switched to the on state, according to the set pressure relief capacity of the pressure relief valve. Then, based on the coordinate information of the pressure sensor, the coordinates of the pressure relief valve are queried outward with the first coordinate information as the origin, based on the principle of minimum distance, to obtain the second coordinate information. Finally, the control code corresponding to the pressure relief valve is obtained according to the second coordinate information, and the corresponding pressure relief valve is switched to the on state according to the code, thereby releasing the pressure. In this embodiment, the number of pressure relief valves switched to the on state is obtained according to the pressure value, and the pressure relief valve at the corresponding position is located according to the position of the pressure sensor, thereby improving the accuracy of the pressure relief operation.

[0158] According to an embodiment of the present invention, it also includes:

[0159] Calculating and obtaining second pressure information according to the first pressure array and a preset time period;

[0160] Obtaining a first pressure sequence according to the second pressure information;

[0161] determining first slope information according to the first pressure sequence;

[0162] Determining whether the first slope information exceeds a preset first slope threshold;

[0163] If so, switch all the pressure relief valves to the on state.

[0164] It should be noted that the second pressure information is the sum of the pressure values ​​of all pressure sensors at any time; the first pressure sequence is a record of the second pressure information obtained according to a preset time period; the first slope information is the slope value of the position of the latest second pressure information in the pressure change trend obtained from the first pressure sequence. In practical applications, there is a problem that the pressure value of a single sensor does not exceed the pressure threshold, but the overall pressure value continues to rise; therefore, this embodiment is based on the sum of the pressure values ​​of all pressure sensors and the change trend of the sum of the pressure values. If it is judged that the pressure value in the cavity is in a continuously rising state, all pressure relief valves are switched to the on state to achieve the effect of timely pressure relief.

[0165] In this embodiment, the first pressure information is collected according to a preset time period to calculate the second pressure information. Then, according to the order of collection, the information is recorded and summarized into a first pressure sequence. According to the first pressure sequence, the slope of the position of the most recently acquired second pressure information is obtained according to the set curve fitting method or coordinate drawing method, that is, the first slope information. Among them, the first slope information represents the changing trend of the total pressure in the cavity, that is, the larger the slope value, the faster the pressure value rises. When the first slope information exceeds the preset first slope threshold, in order to control the extrusion force of the battery cell within a safe range, this embodiment reduces the risk of damage to the battery cell by means of all pressure relief valves in the channel.

[0166] According to an embodiment of the present invention, it also includes:

[0167] The determining of the first slope information according to the first pressure sequence is specifically:

[0168] According to the first pressure sequence, a fitting curve expression and a first correlation coefficient are obtained according to a preset curve fitting equation;

[0169] Determining whether the first correlation coefficient is greater than a preset correlation coefficient threshold;

[0170] If yes, then according to the curve expression and the derivation rule, the slope value of the last position in the first pressure sequence is obtained as the first slope information;

[0171] If not, change the curve fitting equation.

[0172] It should be noted that, as an implementation method, this embodiment obtains the first slope information by a curve fitting method. Take the linear regression least squares method as an example:

[0173] The fitted straight line is: ;

[0174] The fitted slope is: ;

[0175] The fitted intercept is: ;

[0176] Where:

[0177] is the index number of the first pressure sequence;

[0178] is the second pressure information in the first pressure sequence;

[0179] is the average value of the index number in the first pressure sequence;

[0180] is the average value of the second pressure information in the first pressure sequence;

[0181] represents the summation symbol;

[0182] According to the fitting formula of the above linear regression, the fitting curve / fitting line can be obtained, and then according to the mathematical derivation rule, the slope value of the latest second pressure information position in the sequence can be obtained. At the same time, the first correlation coefficient is obtained through the fitting rule to indicate the degree of correlation of the fitting. In practical applications, when the correlation coefficient exceeds 0.99, it is determined that the correlation of the fitting curve / fitting line is strong, and the fitting curve / fitting line can be used to calculate the slope; if the correlation coefficient is less than 0.99, the fitting formula is changed and the first pressure sequence is refitted.

[0183] According to an embodiment of the present invention, determining the first slope information according to the first pressure sequence is specifically:

[0184] Obtaining third coordinate information according to the first pressure sequence;

[0185] Drawing a pressure curve according to the third coordinate information;

[0186] According to the pressure curve, a tangent line is drawn according to the third coordinate information of the farthest position of the horizontal coordinate;

[0187] First slope information is obtained according to the tangent line.

[0188] It should be noted that, as an implementation method, this embodiment determines the slope of the most recently acquired second pressure information position, i.e., the first slope information, by means of coordinate drawing. In this embodiment, the sequence index number is used as the horizontal coordinate, and the second pressure information in the first pressure sequence is used as the vertical coordinate to obtain the third coordinate information. Then, the pressure curve is drawn according to the third coordinate information. Finally, the tangent of the pressure curve is drawn at the third coordinate information with the largest index number, and the first slope information is obtained according to the slope of the tangent.

[0189] It is worth mentioning that it also includes:

[0190] obtaining second pressure information;

[0191] Determining whether the second pressure information is within a preset first pressure range;

[0192] If yes, obtain the first slope information;

[0193] Determining whether the first slope information is lower than a preset second slope threshold;

[0194] If so, the working state of the pressure relief valve is controlled according to the second pressure information.

[0195] It should be noted that in this embodiment, when the sum of the pressure values ​​in the cavity is within the preset first pressure range, it means that the pressure value in the cavity poses a low risk of squeezing the battery cell. At this time, the slope of the pressure change trend, i.e., the first slope information, is obtained. When the first slope information is lower than the preset second slope threshold, it means that the pressure in the cavity is gradually decreasing. Therefore, part of the pressure relief valve can be gradually closed according to the second pressure information. By closing the pressure relief valve, the movable space of the battery is limited, reducing the risk of the battery falling out of the set position.

[0196] It is worth mentioning that it also includes:

[0197] Determining whether the first pressure information exceeds a preset second pressure threshold;

[0198] If yes, obtain the first coordinate information;

[0199] Determine the battery number information according to the first coordinate information;

[0200] A first abnormal instruction is sent according to the battery number information.

[0201] It should be noted that when the first pressure information exceeds the preset second pressure threshold, it means that the pressure value is higher than the safety range and the battery is at risk of swelling and damage. At this time, the battery number is located and queried according to the first coordinate information of the pressure sensor. Finally, the first abnormal instruction is generated according to the battery number and sent to the background to improve the maintenance efficiency of the maintenance personnel.

[0202] It is worth mentioning that it also includes:

[0203] When it is determined that the first pressure switch information is in a disconnected state;

[0204] Control the power supply relay to disconnect the power supply channel.

[0205] It should be noted that when the first pressure switch information is in the disconnected state, it means that the safety switch has been disconnected. At this time, the working state of the locking relay is switched to unlock the battery cell, reducing the risk of damage to the battery cell due to the inability to release pressure; thereby preventing the risk of damage to the battery due to excessive pressure in the battery cavity by locking the relay, thereby improving the safety of battery use. In addition, the power supply channel of the battery is disconnected by switching the state of the power supply relay to avoid damage to electrical equipment.

[0206] A third aspect of the present invention provides a computer-readable storage medium, which includes a battery structure pressure release management method program. When the battery structure pressure release management method program is executed by a processor, the steps of the battery structure pressure release management method as described in any one of the above items are implemented.

[0207] The present invention provides a pressure release management method, system and storage medium for a battery structure. First, first voltage information is obtained. When it is determined that the first voltage information exceeds a preset first voltage threshold, the working state of a pressure relief valve at a corresponding position is controlled according to the position indicated by the first voltage information to achieve a pressure release effect. Then, first pressure switch information is obtained. When it is determined that the first pressure switch information is in a disconnected state, the working state of a locking relay is switched to unlock the battery cell, thereby reducing the risk of damage to the battery cell due to failure to release pressure. The present invention controls the working state of the pressure relief valve at each position to reduce the pressure in the battery cavity, reduce the risk of damage caused by expansion of the battery cell, and increase the service life of the battery. The locking relay is also used to prevent the risk of damage to the battery due to excessive pressure in the battery cavity, thereby improving the safety of battery use.

[0208] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program codes.

[0209] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pressure release management method for a battery structure, characterized in that: The method comprises: obtaining first pressure information; Determining whether the first pressure information is greater than a preset first pressure threshold; If yes, controlling the working state of the pressure relief valve according to the first pressure information; Obtaining first pressure switch information; Determining whether the first pressure switch information is in a disconnected state; If so, switch the working state of the locking relay; Draw a coordinate system using the length and width of the battery structure as coordinate axes respectively; Obtaining first coordinate information according to position information of the pressure sensor in the coordinate system; Obtaining a first pressure array according to the first pressure information and the first coordinate information; Determining first quantity information according to the first pressure information; Get the first coordinate information; Determine second coordinate information according to the first coordinate information; According to the second coordinate information, switching the pressure relief valve at the corresponding position to a conducting state; obtaining a first pressure sequence; According to the first pressure sequence, a fitting curve expression and a first correlation coefficient are obtained according to a preset curve fitting equation; Determining whether the first correlation coefficient is greater than a preset correlation coefficient threshold; If yes, then according to the curve expression and the derivation rule, the slope value of the last position in the first pressure sequence is obtained as the first slope information; If not, then change the curve fitting equation; obtaining second pressure information; Determining whether the second pressure information is within a preset first pressure range; If yes, obtain the first slope information; Determining whether the first slope information is lower than a preset second slope threshold; If yes, controlling the working state of the pressure relief valve according to the second pressure information; The first pressure information is a pressure value detected by a pressure sensor that detects the effect of the battery on the cavity; The first pressure switch information is the state of the set safety switch; The first coordinate information is a coordinate point determined by the position of the pressure sensor in the coordinate system; The first pressure array is a pressure array obtained by combining the pressure values ​​measured by each pressure sensor with the corresponding coordinate points, and is used to represent the force between the battery in the cavity and the housing; The first quantity information is the number of pressure relief valves that need to be switched to the on state; The second coordinate information is the coordinate of the pressure relief valve that needs to be switched to the on state; The first pressure sequence is a record of second pressure information acquired according to a preset time period; The second pressure information is the sum of the pressure values ​​of all pressure sensors at any moment.

2. A method for managing pressure release of a battery structure according to claim 1, characterized in that: Also includes: Calculating and obtaining second pressure information according to the first pressure array and a preset time period; obtaining a first pressure sequence according to the second pressure information; determining first slope information according to the first pressure sequence; Determining whether the first slope information exceeds a preset first slope threshold; If yes, switch all the pressure relief valves to the on state; The first slope information is the slope value of the position of the latest second pressure information in the pressure change trend obtained from the first pressure sequence.

3. A pressure release management method for a battery structure according to claim 2, characterized in that: The determining of the first slope information according to the first pressure sequence is specifically: Obtaining third coordinate information according to the first pressure sequence; Drawing a pressure curve according to the third coordinate information; According to the pressure curve, a tangent line is drawn according to the third coordinate information of the farthest position of the horizontal coordinate; According to the tangent line, obtaining first slope information; The third coordinate information is coordinate information obtained by taking the sequence index number as the horizontal coordinate and the second pressure information in the first pressure sequence as the vertical coordinate.

4. A pressure release management system for a battery structure, characterized in that: The system includes a memory and a processor, wherein the memory includes a pressure release management method program for a battery structure, and when the pressure release management method program for the battery structure is executed by the processor, the following steps are implemented: obtaining first pressure information; Determining whether the first pressure information is greater than a preset first pressure threshold; If yes, controlling the working state of the pressure relief valve according to the first pressure information; Obtaining first pressure switch information; Determining whether the first pressure switch information is in a disconnected state; If so, switch the working state of the locking relay; Draw a coordinate system using the length and width of the battery structure as coordinate axes respectively; Obtaining first coordinate information according to position information of the pressure sensor in the coordinate system; Obtaining a first pressure array according to the first pressure information and the first coordinate information; Determining first quantity information according to the first pressure information; Get the first coordinate information; Determine second coordinate information according to the first coordinate information; According to the second coordinate information, switching the pressure relief valve at the corresponding position to a conducting state; obtaining a first pressure sequence; According to the first pressure sequence, a fitting curve expression and a first correlation coefficient are obtained according to a preset curve fitting equation; Determining whether the first correlation coefficient is greater than a preset correlation coefficient threshold; If yes, then according to the curve expression and the derivation rule, the slope value of the last position in the first pressure sequence is obtained as the first slope information; If not, then change the curve fitting equation; obtaining second pressure information; Determining whether the second pressure information is within a preset first pressure range; If yes, obtain the first slope information; Determining whether the first slope information is lower than a preset second slope threshold; If yes, controlling the working state of the pressure relief valve according to the second pressure information; The first pressure information is a pressure value detected by a pressure sensor that detects the effect of the battery on the cavity; The first pressure switch information is the state of the set safety switch; The first coordinate information is a coordinate point determined by the position of the pressure sensor in the coordinate system; The first pressure array is a pressure array obtained by combining the pressure values ​​measured by each pressure sensor with the corresponding coordinate points, and is used to represent the force between the battery in the cavity and the housing; The first quantity information is the number of pressure relief valves that need to be switched to the on state; The second coordinate information is the coordinate of the pressure relief valve that needs to be switched to the on state; The first pressure sequence is a record of second pressure information acquired according to a preset time period; The second pressure information is the sum of the pressure values ​​of all pressure sensors at any moment.

5. The pressure release management system of a battery structure according to claim 4, characterized in that: Also includes: Acquire a first pressure array; Calculating and obtaining second pressure information according to the first pressure array and a preset time period; Obtaining a first pressure sequence according to the second pressure information; determining first slope information according to the first pressure sequence; Determining whether the first slope information exceeds a preset first slope threshold; If yes, switch all the pressure relief valves to the on state; The first slope information is the slope value of the position of the latest second pressure information in the pressure change trend obtained from the first pressure sequence.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that: The computer-readable storage medium includes a battery structure pressure release management method program, and when the battery structure pressure release management method program is executed by a processor, the steps of the battery structure pressure release management method according to any one of claims 1 to 3 are implemented.

Images