Battery testing device and method
By designing a battery test device containing a mass sensor and a controller, and using mechanical algorithms to calculate the battery volume changes, the problems of low accuracy and low efficiency of traditional battery test methods are solved, and more efficient and accurate battery safety testing is achieved.
Patent Information
- Application Number
- CN202411124836.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-16
- Publication Date
- 2025-02-11
AI Technical Summary
Traditional battery testing methods directly measure the volume of the bulging battery, which has low accuracy and is prone to damage the battery, resulting in inefficient testing.
A battery testing device is designed, including a mass sensor, a controller, a battery hoisting bracket and a target container. By immersing the battery in the target liquid, the battery volume change information is calculated using mass sensors and mechanical algorithms to avoid direct contact with the battery surface.
It improves the accuracy and efficiency of battery expansion volume measurement, avoids battery damage, and enhances the efficiency of battery safety testing.
Smart Images
Figure CN119414262A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery technology, and in particular to a battery testing device and method. Background Art
[0002] When overcharged, overheated, or short-circuited, soft-pack lithium-ion batteries will produce gas inside the battery, causing it to swell. After swelling, soft-pack lithium-ion batteries may experience safety incidents such as thermal runaway. Therefore, accurately measuring the volume of the swollen battery is crucial to testing the safety of the battery.
[0003] In traditional technologies, direct measurement methods are mostly used to determine the volume of a swollen battery.
[0004] However, this direct measurement method not only has low accuracy, but also easily damages the battery, causing problems such as breakage and leakage on the battery surface, resulting in low efficiency in determining the battery expansion volume, and thus low efficiency in battery safety testing. Summary of the invention
[0005] Based on this, it is necessary to provide a battery testing device and method for improving the efficiency of battery safety testing in order to solve the above technical problems.
[0006] In a first aspect, the present application provides a battery testing device, the device comprising: a carrying device provided with a mass sensor, a controller, a battery hanging bracket, and a target container carrying a target liquid;
[0007] The carrying device is used to place the target container carrying the target liquid;
[0008] The battery hoisting bracket is used to hoist the target battery to be tested so that the target battery is immersed in the target liquid and the target battery does not contact the target container;
[0009] The controller is used to obtain the first data collected by the mass sensor and control the target battery to enter a working state, so as to obtain the second data collected by the mass sensor again after a preset time period, so as to determine the volume change information of the target battery according to the second data and the first data.
[0010] In one embodiment, the controller is specifically configured to determine the volume change information of the target battery according to the first data, the density information of the target liquid, the mass information of the target container and the second data.
[0011] In one embodiment, the controller is specifically used to determine the first volume information of the target battery based on the first data, the density information of the target liquid and the mass information of the target container; determine the second volume information of the target battery based on the second data, the density information of the target liquid and the mass information of the target container; and determine the volume change information of the target battery based on the first volume information and the second volume information.
[0012] In one embodiment, the controller is specifically used to construct a first target equation based on a mechanical algorithm, lifting data of the battery lifting bracket, mass data of the target battery and density data of the target liquid; construct a second target equation based on the mechanical algorithm, the first data, mass data of the target container, mass data of the target battery and lifting data of the battery lifting bracket; determine the first volume information of the target battery based on the first target equation and the second target equation.
[0013] In one embodiment, the controller is specifically used to construct a third target equation based on a mechanical algorithm, the lifting data of the battery lifting bracket, the mass data of the target battery and the density data of the target liquid; construct a fourth target equation based on the mechanical algorithm, the second data, the mass data of the target container, the mass data of the target battery and the lifting data of the battery lifting bracket; and determine the second volume information of the target battery based on the third target equation and the fourth target equation.
[0014] In one of the embodiments, the controller is further used to determine the performance information of the target battery according to the volume change information of the target battery.
[0015] In one of the embodiments, the controller is specifically configured to determine a battery expansion rate of the target battery according to volume change information of the target battery, and determine performance information of the target battery according to the battery expansion rate of the target battery.
[0016] In one embodiment, the controller is specifically used to input the volume change information of the target battery into a pre-trained expansion rate evaluation model to obtain the battery expansion rate of the target battery output by the expansion rate evaluation model.
[0017] In one of the embodiments, the controller is further used to obtain third data collected by the mass sensor in real time after controlling the target battery to enter a working state, so as to determine the expansion change rate of the target battery according to the third data.
[0018] In a second aspect, the present application further provides a battery testing method, which is used in a controller in the battery testing device described in the first aspect, and the method comprises:
[0019] Acquiring first data collected by a mass sensor, a target container carrying a target liquid is placed on a carrier device provided with the mass sensor, and a target battery to be tested hoisted by a battery hoisting bracket is not immersed in the target liquid, and the target battery is not in contact with the target container;
[0020] Controlling the target battery to enter a working state, and obtaining the second data collected by the quality sensor again after a preset time;
[0021] The volume change information of the target battery is determined according to the second data and the first data.
[0022] The above-mentioned battery testing device and method, the device includes a carrying device provided with a mass sensor, a controller, a battery hanging bracket and a target container carrying a target liquid; the carrying device is used to place the target container carrying the target liquid; the battery hanging bracket is used to hang the target battery to be tested so that the target battery is immersed in the target liquid and the target battery does not contact the target container; the controller is used to obtain the first data collected by the mass sensor and control the target battery to enter the working state, so as to obtain the second data collected by the mass sensor again after a preset time, so as to determine the volume change information of the target battery according to the second data and the first data. The battery testing device provided by the present application, on the one hand, can determine the volume change of the battery without contacting the battery, thereby avoiding damage to the battery; on the other hand, it avoids the problem of directly measuring the irregular surface of the battery in the prior art, resulting in large errors in the measurement results, thereby improving the efficiency of determining the expansion volume of the battery, thereby improving the efficiency of the battery safety test. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0024] Figure 1 A schematic diagram of the structure of a battery testing device in one embodiment;
[0025] Figure 2 A schematic diagram of a battery testing method according to an embodiment;
[0026] Figure 3 FIG. 4 is a flow chart of a battery testing method in another embodiment. DETAILED DESCRIPTION
[0027] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0028] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0029] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.
[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.
[0031] When overcharged, overheated, or short-circuited, soft-pack lithium-ion batteries will produce gas inside the battery, causing it to swell. After swelling, soft-pack lithium-ion batteries may experience safety incidents such as thermal runaway. Therefore, accurately measuring the volume of the swollen battery is crucial to testing the safety of the battery.
[0032] In traditional technologies, direct measurement methods are mostly used to determine the volume of a swollen battery.
[0033] However, this direct measurement method not only has low accuracy, but also easily damages the battery, causing problems such as breakage and leakage on the battery surface, resulting in low efficiency in determining the battery expansion volume, and thus low efficiency in battery safety testing.
[0034] In view of this, the present application provides a battery testing device, which can not only improve the accuracy of the test results, but also avoid damage to the battery, improve the efficiency of determining the battery expansion volume, and thus improve the efficiency of battery safety testing.
[0035] In an exemplary embodiment, Figure 1 As shown, a battery testing device 100 is provided, which includes a carrying device 101 provided with a mass sensor, a controller (not shown in the figure), a battery hanging bracket 102 and a target container 103 carrying a target liquid.
[0036] Among them, the carrying device 101 is used to place the target container 103 carrying the target liquid; the battery lifting bracket 102 is used to lift the target battery 104 to be tested so that the target battery 104 is immersed in the target liquid and the target battery 104 is not in contact with the target container 103; the controller is used to obtain the first data collected by the mass sensor and control the target battery 104 to enter the working state, so as to obtain the second data collected by the mass sensor again after a preset time, so as to determine the volume change information of the target battery 104 based on the second data and the first data.
[0037] A mass sensor refers to a sensor that can be used to measure the mass of an object. The carrying device 101 can be a device that is provided with a mass sensor and can carry an object. The carrying device 101 can be a high-precision balance, and the graduation value of the high-precision balance reaches 0.01 mg.
[0038] The battery hanging bracket 102 refers to a bracket that can be used to fix the target battery 104. For example, the target battery 104 is hung in a certain device. Exemplarily, the shape and size of the battery hanging bracket 102 can be set by a technician according to the type and size of the battery to ensure that the target battery can be firmly fixed on the bracket. The target liquid can be an insulating liquid. For example, deionized water, ultrapure water, silicone oil, mineral oil, vegetable oil. The target container 103 carrying the target liquid can be a beaker.
[0039] Furthermore, since the target battery 104 needs to be placed in the target container 103, when the target container 103 is a beaker, the diameter and depth of the beaker should be greater than the width and height of the target battery 104. And since the target battery 104 needs to be immersed in the target liquid, the liquid level of the target liquid in the target container 103 should be greater than the height of the target battery 104, or the amount of the target liquid should be determined according to actual conditions.
[0040] The controller may be a microcontroller. The preset duration may be pre-set by a technician according to actual needs. The target battery 104 may be a soft-pack lithium-ion battery.
[0041] In some exemplary embodiments, after the user places the target container carrying the target liquid on the carrying device, the target battery to be tested can be fixed to the battery lifting bracket. In response to the user's operation, the controller will control the target battery lifting bracket to move so that the target battery is immersed in the target liquid and the target battery is not in contact with the target container. At this time, the controller will obtain the first data collected by the quality sensor, control the target battery to enter a working state, and obtain the second data collected by the quality sensor again after a preset period of time.
[0042] Furthermore, the controller may input the first data and the second data into a pre-trained volume change information determination model to obtain the volume change information of the target battery output by the volume change information determination model.
[0043] The controller may also determine the volume change information of the target battery according to the first data, the density information of the target liquid, the mass information of the target container and the second data.
[0044] The above-mentioned battery testing device and method, the device includes a carrying device provided with a mass sensor, a controller, a battery hanging bracket and a target container carrying a target liquid; the carrying device is used to place the target container carrying the target liquid; the battery hanging bracket is used to hang the target battery to be tested so that the target battery is immersed in the target liquid and the target battery does not contact the target container; the controller is used to obtain the first data collected by the mass sensor and control the target battery to enter the working state, so as to obtain the second data collected by the mass sensor again after a preset time, so as to determine the volume change information of the target battery according to the second data and the first data. The battery testing device provided by the present application, on the one hand, can determine the volume change of the battery without contacting the battery, thereby avoiding damage to the battery; on the other hand, it avoids the problem of directly measuring the irregular surface of the battery in the prior art, resulting in large errors in the measurement results, thereby improving the efficiency of determining the expansion volume of the battery, thereby improving the efficiency of the battery safety test.
[0045] In an exemplary embodiment, the controller is specifically configured to determine the volume change information of the target battery according to the first data, the density information of the target liquid, the mass information of the target container, and the second data.
[0046] In some exemplary embodiments, the controller may first obtain the first data collected by the quality sensor before controlling the target battery to enter a working state, and then obtain the second data collected by the quality sensor after controlling the target battery to enter a working state and working for a preset time.
[0047] Furthermore, the density information of the target liquid and the mass information of the target container are obtained, and the first data, the second data, the density information of the target liquid and the mass information of the target container are input into a pre-trained volume change information determination model to obtain the volume change information of the target battery output by the volume change information determination model.
[0048] The controller can also determine the first volume information of the target battery based on the first data, the density information of the target liquid and the mass information of the target container, and then determine the second volume information of the target battery based on the second data, the density information of the target liquid and the mass information of the target container, and then determine the volume change information of the target battery based on the first volume information and the second volume information.
[0049] In an exemplary embodiment, the controller is specifically configured to determine the first volume information of the target battery according to the first data, density information of the target liquid and mass information of the target container.
[0050] In an exemplary embodiment, the controller is specifically used to construct a first target equation based on a mechanical algorithm, lifting data of the battery lifting bracket, mass data of the target battery and density data of the target liquid; construct a second target equation based on the mechanical algorithm, the first data, mass data of the target container, mass data of the target battery and lifting data of the battery lifting bracket; and determine the first volume information of the target battery based on the first target equation and the second target equation.
[0051] Optionally, the mechanics algorithm may be a Newton's theorem algorithm or an Archimedes' buoyancy law algorithm.
[0052] In some exemplary embodiments, before the controller controls the target battery to enter the working state, the controller may obtain a first target equation and a second target equation based on the Newton's theorem algorithm:
[0053] ;
[0054] ;
[0055] in, Refers to the hoisting data of the battery hoisting bracket at the current moment, that is, the pulling force of the battery hoisting bracket on the target battery; Refers to the buoyancy of the target battery in the target liquid at the current moment; Refers to the quality data of the target battery; Refers to the first data, Refers to the mass data of the target container and the mass data of the target liquid.
[0056] Further, according to the first target equation, the second target equation and the Archimedes buoyancy law algorithm, the first volume information of the target battery can be determined. Specifically, the first target equation and the second target equation are subtracted to obtain:
[0057] ;
[0058] According to the Archimedes buoyancy law algorithm, we can get:
[0059] ;
[0060] Among them, the Refers to the density data of the target liquid. Therefore, the first volume information of the target battery can be determined as .
[0061] In an exemplary embodiment, the controller is specifically configured to determine the second volume information of the target battery according to the second data, density information of the target liquid and mass information of the target container.
[0062] In an exemplary embodiment, the controller is specifically used to construct a third target equation based on a mechanical algorithm, the lifting data of the battery lifting bracket, the mass data of the target battery and the density data of the target liquid; construct a fourth target equation based on the mechanical algorithm, the second data, the mass data of the target container, the mass data of the target battery and the lifting data of the battery lifting bracket; and determine the second volume information of the target battery based on the third target equation and the fourth target equation.
[0063] In some exemplary embodiments, the controller controls the target battery to enter a working state, and after the target battery works for a preset time, the second data collected by the mass sensor is acquired again, and the controller can obtain a third target equation and a fourth target equation based on the Newton's theorem algorithm:
[0064] ;
[0065] ;
[0066] in, Refers to the lifting data of the battery lifting bracket after the target battery enters the working state and works for a preset time, that is, the pulling force of the battery lifting bracket on the target battery; It refers to the buoyancy of the target battery in the target liquid after the target battery enters the working state and works for a preset time; Refers to the quality data of the target battery; refers to the second data, Refers to the mass data of the target container and the mass data of the target liquid.
[0067] Further, according to the third target equation, the fourth target equation and the Archimedes buoyancy law algorithm, the second volume information of the target battery can be determined. Specifically, the third target equation and the fourth target equation are subtracted to obtain:
[0068] ;
[0069] According to the Archimedes buoyancy law algorithm, we can get:
[0070] ;
[0071] Among them, the Refers to the density data of the target liquid. Therefore, the second volume information of the target battery can be determined as .
[0072] In an exemplary embodiment, the controller is specifically configured to determine volume change information of the target battery according to the first volume information and the second volume information.
[0073] In some exemplary embodiments, the volume change information of the target battery .
[0074] In an exemplary embodiment, the controller is further configured to determine performance information of the target battery according to volume change information of the target battery.
[0075] In some exemplary embodiments, the volume change information of the target battery may be input into a pre-trained performance information determination model to obtain the performance information of the target battery output by the performance information determination model.
[0076] In other exemplary embodiments, the battery expansion rate of the target battery may be determined based on the volume change information of the target battery, and the performance information of the target battery may be determined based on the battery expansion rate of the target battery.
[0077] In an exemplary embodiment, the controller is specifically configured to determine a battery expansion rate of the target battery according to volume change information of the target battery, and determine performance information of the target battery according to the battery expansion rate of the target battery.
[0078] In some exemplary embodiments, the battery expansion rate of the target battery may be determined based on the expansion rate algorithm, the first volume information, and the second volume information. Specifically, the battery expansion rate may be .
[0079] In an exemplary embodiment, the controller is specifically configured to input the volume change information of the target battery into a pre-trained expansion rate evaluation model to obtain the battery expansion rate of the target battery output by the expansion rate evaluation model.
[0080] Optionally, the expansion rate evaluation model may be a neural network model.
[0081] In some exemplary embodiments, if the battery expansion rate of the target battery is determined to be 1% to 3%, it is determined that the target battery has slightly expanded, that is, the volume change of the target battery will not have much impact on the safety and service life of the target battery, and it is determined that the performance of the target battery is good.
[0082] If it is determined that the battery expansion rate of the target battery is less than 3%, it is determined that the target battery has slightly expanded and the performance of the target battery is relatively high. Specifically, it is determined that the safety performance of the target battery is relatively high and the safety risk is extremely low.
[0083] If it is determined that the battery expansion rate of the target battery is 3% to 5%, it is determined that the target battery has expanded and the performance of the target battery is average. Specifically, it is determined that the safety performance of the target battery is average and the safety risk is low.
[0084] If it is determined that the battery expansion rate of the target battery is 5% to 15%, it is determined that the target battery has significantly expanded and the performance of the target battery is poor. Specifically, it is determined that the safety performance of the target battery is poor and the safety risk is medium risk.
[0085] If it is determined that the battery expansion rate of the target battery is greater than 15%, it is determined that the target battery has been severely expanded and the performance of the target battery is extremely poor. Specifically, it is determined that the safety performance of the target battery is extremely poor and the safety risk is high.
[0086] In an exemplary embodiment, the controller is further used to obtain third data collected by the mass sensor in real time after controlling the target battery to enter a working state, so as to determine the expansion change rate of the target battery according to the third data.
[0087] The expansion change rate of the target battery refers to the rate at which the target battery expands.
[0088] In some exemplary embodiments, after the controller controls the target battery to enter a working state, the third data collected by the mass sensor is acquired in real time, and the real-time volume change information of the target battery is determined based on the third data and the first data, and then the expansion change rate of the target battery can be determined based on time.
[0089] In an exemplary embodiment, Figure 2 As shown, a battery testing method is provided, which is used for the controller described in any of the above embodiments, and the method includes:
[0090] Step 201, obtaining first data collected by a mass sensor, a target container carrying a target liquid is placed on a carrier device provided with the mass sensor, and a target battery to be tested hoisted by a battery hoisting bracket is not immersed in the target liquid, and the target battery is not in contact with the target container;
[0091] Step 202: Control the target battery to enter a working state, and after a preset time, obtain the second data collected by the quality sensor again;
[0092] Step 203: Determine volume change information of the target battery according to the second data and the first data.
[0093] In an exemplary embodiment, the volume change information of the target battery is determined based on the second data and the first data, including: determining the volume change information of the target battery based on the first data, density information of the target liquid, mass information of the target container and the second data.
[0094] In an exemplary embodiment, the volume change information of the target battery is determined based on the first data, the density information of the target liquid, the mass information of the target container, and the second data, including: determining the first volume information of the target battery based on the first data, the density information of the target liquid, and the mass information of the target container; determining the second volume information of the target battery based on the second data, the density information of the target liquid, and the mass information of the target container; determining the volume change information of the target battery based on the first volume information and the second volume information.
[0095] In an exemplary embodiment, the first volume information of the target battery is determined based on the first data, the density information of the target liquid and the mass information of the target container, including: constructing a first target equation based on a mechanical algorithm, the hoisting data of the battery hoisting bracket, the mass data of the target battery and the density data of the target liquid; constructing a second target equation based on the mechanical algorithm, the first data, the mass data of the target container, the mass data of the target battery and the hoisting data of the battery hoisting bracket; determining the first volume information of the target battery based on the first target equation and the second target equation.
[0096] In an exemplary embodiment, the second volume information of the target battery is determined based on the second data, the density information of the target liquid and the mass information of the target container, including: constructing a third target equation based on a mechanical algorithm, the hoisting data of the battery hoisting bracket, the mass data of the target battery and the density data of the target liquid; constructing a fourth target equation based on the mechanical algorithm, the second data, the mass data of the target container, the mass data of the target battery and the hoisting data of the battery hoisting bracket; and determining the second volume information of the target battery based on the third target equation and the fourth target equation.
[0097] In an exemplary embodiment, the method further includes: determining performance information of the target battery according to volume change information of the target battery.
[0098] In an exemplary embodiment, determining the performance information of the target battery based on the volume change information of the target battery includes: determining the battery expansion rate of the target battery based on the volume change information of the target battery, and determining the performance information of the target battery based on the battery expansion rate of the target battery.
[0099] In an exemplary embodiment, the battery expansion rate of the target battery is determined based on the volume change information of the target battery, including: inputting the volume change information of the target battery into a pre-trained expansion rate evaluation model to obtain the battery expansion rate of the target battery output by the expansion rate evaluation model.
[0100] In an exemplary embodiment, the method further includes: after controlling the target battery to enter a working state, acquiring third data collected by the mass sensor in real time to determine the expansion change rate of the target battery according to the third data.
[0101] In an exemplary embodiment, Figure 3 As shown, another battery testing method is provided, which is used for the controller of any of the above embodiments, and the method includes the following steps:
[0102] Step 301, obtaining first data collected by a mass sensor, a target container carrying a target liquid is placed on a carrier device provided with the mass sensor, and a target battery to be tested hoisted by a battery hoisting bracket is not immersed in the target liquid, and the target battery is not in contact with the target container;
[0103] Step 302: Control the target battery to enter a working state, and after a preset time, obtain the second data collected by the quality sensor again;
[0104] Step 303: construct a first target equation according to a mechanical algorithm, the hoisting data of the battery hoisting bracket, the mass data of the target battery, and the density data of the target liquid; construct a second target equation according to a mechanical algorithm, the first data, the mass data of the target container, the mass data of the target battery, and the hoisting data of the battery hoisting bracket; determine the first volume information of the target battery according to the first target equation and the second target equation;
[0105] Step 304: construct a third target equation according to the mechanical algorithm, the hoisting data of the battery hoisting bracket, the mass data of the target battery, and the density data of the target liquid; construct a fourth target equation according to the mechanical algorithm, the second data, the mass data of the target container, the mass data of the target battery, and the hoisting data of the battery hoisting bracket; determine the second volume information of the target battery according to the third target equation and the fourth target equation;
[0106] Step 305: determine the volume change information of the target battery according to the first volume information and the second volume information, input the volume change information of the target battery into a pre-trained expansion rate evaluation model to obtain the battery expansion rate of the target battery output by the expansion rate evaluation model, and determine the performance information of the target battery according to the battery expansion rate of the target battery.
[0107] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.
[0108] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.
[0109] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.
Claims
1. A battery testing device, characterized in that: The device comprises: a carrying device provided with a mass sensor, a controller, a battery hanging bracket and a target container carrying a target liquid; The carrying device is used to place a target container carrying the target liquid; The battery hoisting bracket is used to hoist the target battery to be tested so that the target battery is immersed in the target liquid and the target battery does not contact the target container; The controller is used to obtain the first data collected by the mass sensor and control the target battery to enter a working state, so as to obtain the second data collected by the mass sensor again after a preset time period, so as to determine the volume change information of the target battery according to the second data and the first data.
2. The device according to claim 1, characterized in that The controller is specifically used to determine the volume change information of the target battery according to the first data, the density information of the target liquid, the mass information of the target container and the second data.
3. The device according to claim 2, characterized in that The controller is specifically configured to determine first volume information of the target battery according to the first data, density information of the target liquid and mass information of the target container; determining second volume information of the target battery according to the second data, density information of the target liquid and mass information of the target container; The volume change information of the target battery is determined according to the first volume information and the second volume information.
4. The device according to claim 3, characterized in that The controller is specifically used to construct a first target equation according to a mechanical algorithm, the hoisting data of the battery hoisting bracket, the mass data of the target battery and the density data of the target liquid; Constructing a second target equation according to a mechanical algorithm, the first data, the mass data of the target container, the mass data of the target battery, and the hoisting data of the battery hoisting bracket; The first volume information of the target battery is determined according to the first target equation and the second target equation.
5. The device according to claim 3, characterized in that The controller is specifically used to construct a third target equation according to a mechanical algorithm, the hoisting data of the battery hoisting bracket, the mass data of the target battery and the density data of the target liquid; Constructing a fourth target equation according to a mechanical algorithm, the second data, the mass data of the target container, the mass data of the target battery, and the hoisting data of the battery hoisting bracket; Second volume information of the target battery is determined according to the third target equation and the fourth target equation.
6. The device according to any one of claims 1 to 5, characterized in that: The controller is further used to determine the performance information of the target battery according to the volume change information of the target battery.
7. The device according to claim 6, characterized in that The controller is specifically used to determine the battery expansion rate of the target battery according to the volume change information of the target battery, and determine the performance information of the target battery according to the battery expansion rate of the target battery.
8. The device according to claim 7, characterized in that The controller is specifically used to input the volume change information of the target battery into a pre-trained expansion rate evaluation model to obtain the battery expansion rate of the target battery output by the expansion rate evaluation model.
9. The device according to claim 1, characterized in that The controller is further used to obtain the third data collected by the mass sensor in real time after controlling the target battery to enter the working state, so as to determine the expansion change rate of the target battery according to the third data.
10. A battery testing method, characterized in that: A controller for a battery testing device according to any one of claims 1 to 9, the method comprising: Acquiring first data collected by a mass sensor, a target container carrying a target liquid is placed on a carrier device provided with the mass sensor, and a target battery to be tested hoisted by a battery hoisting bracket is not immersed in the target liquid, and the target battery is not in contact with the target container; Controlling the target battery to enter a working state, and obtaining the second data collected by the quality sensor again after a preset time; The volume change information of the target battery is determined according to the second data and the first data.