CN118150067A

CN118150067A - Battery testing system and battery testing method

Info

Publication number: CN118150067A
Application number: CN202410581006.6A
Authority: CN
Inventors: 周海伦; 连登伟; 张宁; 钟惠英; 刘杰; 刘凤配
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2024-05-11
Filing date: 2024-05-11
Publication date: 2024-06-07

Abstract

The application provides a battery testing system and a battery testing method, and belongs to the technical field of batteries. The battery test system includes: a seal box configured to accommodate a battery to be measured and a cooling module to be measured for cooling the battery to be measured; a first controlled air path configured to adjust a pressure of a first air source outside the sealing case and selectively communicate the first air source with the inside of the case of the battery to be measured; a second controlled air path configured to regulate a pressure of a second air source outside the seal box and selectively communicate the second air source with the inside of the housing of the cooling assembly to be tested; and a seal detection gas path configured to selectively communicate with the inside of the case of the seal box and detect sealing performance of the battery to be tested and the cooling assembly to be tested in communication with the inside of the case of the seal box. The battery test system can test the battery to be tested and the cooling component to be tested simultaneously, improves the detection efficiency of tightness detection, and can improve the integration level of test equipment.

Description

Battery testing system and battery testing method

Technical Field

The present application relates to the field of battery technologies, and in particular, to a battery testing system and a battery testing method.

Background

Energy conservation and emission reduction are key to sustainable development of the automobile industry, and electric vehicles become an important component of sustainable development of the automobile industry due to the energy conservation and environmental protection advantages of the electric vehicles. For electric vehicles, battery technology is an important factor in the development of the electric vehicles.

In the production process of the battery, the tightness detection of the battery and a cooling component matched with the battery is an important step. Through detecting the leakproofness of battery and cooling module, can reduce the probability of the battery short circuit, explosion etc. security risk, improve the security.

Disclosure of Invention

An object of the present application is to provide a battery test system and a battery test method to improve the detection efficiency and accuracy of the tightness detection.

An embodiment of a first aspect of the present application provides a battery test system including: a seal box configured to accommodate a battery to be measured and a cooling module to be measured for cooling the battery to be measured; a first controlled gas path configured to adjust a pressure of a first gas source outside the seal box and selectively communicate the first gas source with the inside of the case of the battery to be measured to charge a first trace gas from the first gas source into the inside of the case of the battery to be measured; a second controlled gas circuit configured to regulate a pressure of a second gas source external to the seal box and selectively communicate the second gas source with the interior of the housing of the cooling assembly to be tested to charge a second trace gas from the second gas source into the interior of the housing of the cooling assembly to be tested; and a seal detection gas path configured to selectively communicate with a housing interior of the seal box and detect a sealing performance of the battery to be tested by detecting a first trace gas inside the housing interior of the seal box in a case of communication with the housing interior of the seal box and detect a sealing performance of the cooling assembly to be tested by detecting a second trace gas inside the housing interior of the seal box, the seal detection gas path including: a gas leak detector configured to detect a first trace gas and a second trace gas inside a housing of the seal box in communication with the housing interior of the seal box; and a first on-off valve connected between the housing of the seal box and the gas leak detector, configured to selectively communicate the interior of the housing of the seal box with the gas leak detector.

According to the technical scheme, the battery to be tested and the cooling component to be tested can be tested simultaneously by arranging the two controlled air paths, so that the detection efficiency of tightness detection is improved, the required labor cost is reduced, the integration level of the testing equipment is improved, and the occupied area of the testing equipment is reduced. The tracer gas is used for detecting the sealing performance of the battery to be detected and the cooling component to be detected, the detection result is less influenced by the ambient temperature, the defects of the product can be effectively identified, and the detection accuracy is improved. Through setting up first on-off valve, can be according to the use needs with gas leak detector and seal box casing selectivity intercommunication, just make gas leak detector detect the inside tracer gas of seal box casing when meeting the test requirement, improve flexibility and the accuracy of detection.

In some embodiments, the seal-detecting gas circuit further comprises: a suction gun configured to suck gas; and a second on-off valve connected between the suction gun and the gas leak detector and configured to selectively communicate the suction gun with the gas leak detector. And a suction gun is arranged in the seal detection gas circuit, and when the gas leak detector detects that the battery to be detected and/or the cooling component to be detected have leakage, the suction gun can be further used for accurately determining the leakage position.

In some embodiments, the first controlled gas circuit comprises: a first pressure regulating valve connected to the first air source and configured to regulate the pressure of the first air source; and a third three-way shut-off valve connected to the first pressure regulating valve and configured to selectively communicate the first pressure regulating valve with the inside of the case of the battery to be measured. The pressure regulating valve and the on-off valve are arranged in the first controlled air passage, so that the pressure of the first air source can be regulated according to detection requirements, whether the first air source inflates the inside of the battery shell to be detected or not can be controlled, the application scene of the battery test system is expanded, and meanwhile, the safety of the detection process is improved.

In some embodiments, the second controlled gas path comprises: the second pressure regulating valve is connected with the second air source and is configured to regulate the pressure of the second air source; and a fourth shut-off valve connected to the second pressure regulating valve and configured to selectively communicate the second pressure regulating valve with the interior of the housing of the cooling assembly to be tested. The pressure regulating valve and the on-off valve are arranged in the second controlled air passage, so that the pressure of the second air source can be regulated according to detection requirements, whether the second air source inflates the inside of the cooling assembly shell to be detected or not can be controlled, the application scene of the battery test system is expanded, and meanwhile, the safety of the detection process is improved.

In some embodiments, the battery test system further comprises: the first pressure gauge is arranged in the first controlled air path and communicated with the inside of the shell of the battery to be detected and is configured to detect the pressure inside the shell of the battery to be detected; and a second pressure gauge disposed in the second controlled gas path and in communication with the interior of the housing of the cooling assembly to be tested, configured to detect a pressure within the housing of the cooling assembly to be tested. The pressure gauge is arranged in the battery test system, the pressure inside the shell of the battery to be tested and the pressure inside the shell of the cooling assembly to be tested are detected, so that the pressure conditions inside the shells of the battery to be tested and the cooling assembly to be tested can be conveniently obtained in the test process, the detection result is more accurate, and meanwhile, the safety of the detection process is improved.

In some embodiments, the battery test system further comprises: the electrical property detection device is electrically connected with the battery to be detected and is configured to detect the electrical property of the battery to be detected. By arranging the electrical property detection device in the battery test system, the tightness detection and the electrical property detection can be performed in parallel, the time required by the battery test is shortened, the production efficiency is improved, and the production cost is reduced.

In some embodiments, the battery testing system further includes a connection assembly disposed inside the housing of the seal box, wherein the first controlled gas path and the electrical performance detecting device are both connected to the battery to be tested through the connection assembly. The first controlled gas circuit and the electrical property detection device are connected with the battery to be tested through the same connecting component, so that the number of tools required by testing is reduced, and the work loss and the tool cost can be reduced.

An embodiment of a second aspect of the present application provides a battery testing method, which is applied to the battery testing system described in the foregoing embodiment, including: controlling a first controlled air passage to adjust the pressure of a first air source to a first preset pressure; the first controlled air circuit is controlled to communicate the first air source with the inside of the shell of the battery to be tested, so that the first air source charges air into the inside of the shell of the battery to be tested through the first controlled air circuit; controlling a second controlled air passage to adjust the pressure of a second air source to a second preset pressure; controlling a second controlled air passage to communicate a second air source with the inside of the shell of the cooling assembly to be tested, so that the second air source charges air into the inside of the shell of the cooling assembly to be tested through the second controlled air passage; control sealed detection gas circuit and the inside intercommunication of casing of seal box, include: controlling the first on-off valve to be opened so as to communicate the interior of the shell of the sealing box with the gas leak detector; and control the sealed detection gas circuit to detect the sealing performance of the battery to be detected and the cooling component to be detected, comprising: the control gas leak detector detects the first trace gas and the second trace gas. The pressure of two air sources is respectively set through the two controlled air paths, so that the two air sources respectively inflate the battery to be tested and the shell of the cooling assembly to be tested, the battery to be tested and the cooling assembly to be tested can be tested simultaneously, the detection efficiency of tightness detection is improved, the required labor cost is reduced, the integration level of the test equipment can be improved, and the occupied area of the test equipment is reduced. According to the use needs with gas leak detector and seal box casing selectivity intercommunication, detect the sealing performance of awaiting measuring battery and awaiting measuring cooling module through detecting the inside tracer gas of seal box casing, can effectively discern the product defect, improve flexibility and the accuracy of detection.

In some embodiments, the gas leak detector is configured to detect concentrations of the first trace gas and the second trace gas inside the housing of the seal box while in communication with the housing interior of the seal box, the seal detection gas circuit further comprising: a suction gun and a second on-off valve connected between the suction gun and the gas leak detector, wherein the battery testing method further comprises: when the gas leak detector detects that the change value of the concentration of the first trace gas before and after the first on-off valve is opened is larger than a first preset threshold value, the first on-off valve is controlled to be closed, the second on-off valve is controlled to be opened, and a suction gun is used for sucking gas from the shell of the battery to be detected for the gas leak detector to detect, so that a leakage point on the shell of the battery to be detected is positioned; and under the condition that the gas leak detector detects that the change value of the concentration of the second trace gas before and after the first on-off valve is opened is larger than a second preset threshold value, the first on-off valve is controlled to be closed, the second on-off valve is controlled to be opened, and a suction gun is used for sucking gas from the shell of the cooling assembly to be detected for the gas leak detector to detect, so that a leakage point on the shell of the cooling assembly to be detected is positioned. When the gas leak detector detects the tracer gas to determine that the battery to be detected and/or the cooling component to be detected have leakage, the suction gun can be further used for accurately determining the leakage position, so that the detection precision is improved.

In some embodiments, the first controlled gas circuit includes a first pressure regulating valve connected to the first gas source and a third on-off valve connected to the first pressure regulating valve, and the second controlled gas circuit includes a second pressure regulating valve connected to the second gas source and a fourth on-off valve connected to the second pressure regulating valve, wherein: controlling the first controlled gas circuit to adjust the pressure of the first gas source to a first preset pressure includes: controlling a first pressure regulating valve to regulate the pressure of a first air source to a first preset pressure; controlling the first controlled gas circuit to communicate the first gas source with the interior of the housing of the battery to be tested includes: controlling the third three-way shut-off valve to be opened so as to communicate the first air source with the inside of the shell of the battery to be tested; controlling the second controlled gas circuit to adjust the pressure of the second gas source to a second preset pressure includes: controlling a second pressure regulating valve to regulate the pressure of a second air source to a second preset pressure; controlling the second controlled air path to communicate the second air source with the interior of the housing of the cooling assembly to be tested includes: and controlling the fourth shut-off valve to be opened so as to communicate the second air source with the inside of the shell of the cooling assembly to be tested. The pressure regulating valve and the on-off valve are arranged in the controlled air passage, so that the pressure of the air source can be respectively regulated according to detection requirements, whether the air source inflates the battery to be detected and/or the shell of the cooling assembly to be detected or not can be respectively controlled, the application scene of the battery test system is expanded, and meanwhile, the safety of the detection process is improved.

In some embodiments, the battery test system further comprises: the first pressure gauge is arranged in the first controlled gas path and is communicated with the inside of the shell of the battery to be tested; and a second pressure gauge arranged in the second controlled air path and communicated with the inside of the shell of the cooling component to be tested, wherein the battery testing method further comprises the following steps: after the first controlled air circuit is controlled to communicate the first air source with the inside of the shell of the battery to be tested, the first pressure gauge is controlled to detect the pressure inside the shell of the battery to be tested; and responding to the condition that the pressure in the shell of the battery to be tested meets the first pressure condition, and controlling the third cut-off valve to be closed so as to ensure that the first air source is not communicated with the shell of the battery to be tested; after the second controlled air path is controlled to communicate the second air source with the inside of the shell of the cooling assembly to be detected, the second pressure gauge is controlled to detect the pressure inside the shell of the cooling assembly to be detected; and controlling the fourth shut-off valve to close so that the second air source is not communicated with the interior of the shell of the cooling assembly to be tested in response to the pressure in the shell of the cooling assembly to be tested meeting the second pressure condition. When the pressure gauge detects that the pressure inside the shell of the battery to be tested and/or the cooling assembly to be tested meets the respective preset pressure conditions, the corresponding on-off valve is closed, so that the air source does not charge air into the shell of the battery to be tested and/or the cooling assembly to be tested, and the safety risk possibly caused by overlarge pressure is reduced.

In some embodiments, the battery testing method further comprises: before controlling the first controlled air path to adjust the pressure of the first air source to a first preset pressure, controlling the first pressure regulating valve to adjust the pressure of the first air source to a third preset pressure; controlling the third three-way shut-off valve to be opened so as to communicate the first air source with the inside of the shell of the battery to be tested, so that the first air source pumps air from the inside of the shell of the battery to be tested through the first controlled air path; controlling a first pressure gauge to detect the pressure inside a shell of the battery to be detected; responding to the condition that the pressure in the shell of the battery to be tested meets a third pressure condition, and controlling the third three-way shut-off valve to be closed so as to ensure that the first air source is not communicated with the interior of the shell of the battery to be tested; and determining whether a deviation value between the pressure inside the casing of the battery to be measured and a third preset pressure exceeds a third predetermined threshold; before controlling the second controlled air path to adjust the pressure of the second air source to a second preset pressure, controlling the second pressure regulating valve to adjust the pressure of the second air source to a fourth preset pressure; controlling the fourth shut-off valve to be opened so as to communicate the second air source with the inside of the shell of the cooling assembly to be detected, so that the second air source pumps air from the inside of the shell of the cooling assembly to be detected through the second controlled air path; controlling a second pressure gauge to detect the pressure inside the shell of the cooling component to be detected; responding to the condition that the pressure in the shell of the cooling component to be detected meets a fourth pressure condition, and controlling the fourth shut-off valve to be closed so as to ensure that the second air source is not communicated with the shell of the cooling component to be detected; and determining whether a deviation value between the pressure inside the housing of the cooling assembly to be tested and a fourth preset pressure exceeds a fourth predetermined threshold. Before the inside of the shell of the battery to be tested and the shell of the cooling component to be tested are inflated, air is firstly pumped from the inside of the shell of the battery to be tested and the shell of the cooling component to be tested respectively, whether air leakage exists in the shell of the battery to be tested and the shell of the cooling component to be tested or not is determined according to the detection result of the pressure gauge, then the inside of the shell of the battery to be tested and the shell of the cooling component to be tested is inflated, the sealing performance of the battery to be tested and the cooling component to be tested is further detected by using a sealing detection air path, and the accuracy of the detection result is improved.

In some embodiments, the battery test system further comprises an electrical property detection device electrically connected to the battery under test, and the battery test method further comprises: the control electrical property detecting device detects the electrical property of the battery to be detected. The sealing performance and the electrical performance of the battery to be tested are detected in parallel, so that the time required by testing the battery can be shortened, the production efficiency is improved, and the production cost is reduced.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

In the drawings, the same reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily drawn to scale. It is appreciated that these drawings depict only some embodiments according to the disclosure and are not therefore to be considered limiting of its scope.

FIG. 1 is a block diagram of a battery testing system according to some embodiments of the application;

FIG. 2 is a block diagram of a battery testing system according to some embodiments of the application;

FIG. 3 is a flow chart of a battery testing method according to some embodiments of the application;

FIG. 4 is a schematic flow chart of determining leakage points according to some embodiments of the present application;

FIG. 5 is a flow chart of detecting pressure inside a housing of a battery under test according to some embodiments of the present application;

FIG. 6 is a flow chart of detecting pressure inside a housing of a cooling module to be tested according to some embodiments of the present application;

FIG. 7 is a flow chart of detecting whether a casing of a battery to be tested is leaked according to some embodiments of the present application;

FIG. 8 is a flow chart of detecting whether a housing of a cooling module to be tested is leaking according to some embodiments of the present application.

Reference numerals illustrate:

A battery test system 100;

The device comprises a sealing box 110, a first controlled air channel 120, a second controlled air channel 130, a sealing detection air channel 140, an electrical performance detection device 150 and a connecting assembly 160;

A first air source 1, a second air source 2, a battery 10 to be tested, and a cooling assembly 20 to be tested;

A first pressure regulating valve 121, a third cut-off valve 122, a first pressure gauge 123;

a second pressure regulating valve 131, a fourth shut-off valve 132, a second pressure gauge 133;

a first on-off valve 141, a gas leak detector 142, a second on-off valve 143, and a suction gun 144.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

The existing detection procedure generally needs to detect the sealing performance of the battery to be detected and the sealing performance of the cooling component to be detected step by step, and the detection beat is longer, so that the time cost and the labor cost required by the detection are higher.

In order to improve detection efficiency, a battery test system is designed, and the sealing performance of a battery to be tested and a cooling assembly to be tested can be detected in parallel. In the battery test system, two controlled air paths are arranged, so that the battery to be tested and the cooling assembly to be tested can be tested simultaneously.

Under the background of increasing requirements on battery detection efficiency, the battery test system can improve the detection efficiency of tightness detection, reduce the required labor cost, improve the integration level of test equipment and reduce the occupied area of the test equipment.

The battery testing system disclosed by the embodiment of the application can be used for, but not limited to, a battery testing process for electric devices such as vehicles, ships or aircrafts. The battery test system disclosed by the application can be used, so that the detection beat is shortened, and the battery test efficiency is improved.

Embodiments of the present application provide a battery test system 100. Referring to fig. 1, the battery test system 100 includes a sealing case 110, a first controlled gas path 120, a second controlled gas path 130, and a seal detection gas path 140.

The sealing case 110 is configured to accommodate the battery 10 to be measured and the cooling module 20 to be measured for cooling the battery 10 to be measured.

The first controlled gas path 120 is configured to regulate the pressure of the first gas source 1 outside the seal box 110 and selectively communicate the first gas source 1 with the inside of the case of the battery 10 to be measured to charge the first trace gas from the first gas source 1 into the inside of the case of the battery 10 to be measured.

The second controlled air path 130 is configured to regulate the pressure of the second air source 2 outside the seal box 110 and selectively communicate the second air source 2 with the housing interior of the cooling assembly 20 to be tested to charge the housing interior of the cooling assembly 20 with the second trace gas from the second air source 2.

The seal detection gas path 140 is configured to selectively communicate with the housing interior of the seal box 110, and in the case of communication with the housing interior of the seal box 110, detects the sealing performance of the battery 10 to be measured by detecting the first trace gas inside the housing interior of the seal box 110, and detects the sealing performance of the cooling assembly 20 to be measured by detecting the second trace gas inside the housing interior of the seal box 110.

The seal detection gas path 140 includes a gas leak detector 142 and a first on-off valve 141.

The gas leak detector 142 is configured to detect the first trace gas and the second trace gas inside the housing of the seal box 110 in communication with the housing interior of the seal box 110.

A first on-off valve 141 is connected between the housing of the seal box 110 and the gas leak detector 142, and is configured to selectively communicate the interior of the housing of the seal box 110 with the gas leak detector 142.

In embodiments of the present application, the term "battery" may encompass a battery cell, or a series, parallel, or series-parallel configuration of multiple battery cells (e.g., a battery pack or battery module). The term "cooling assembly" may include assemblies (e.g., water cooled plates) that reduce the temperature of the battery using a variety of different heat dissipation means (e.g., air cooling or liquid cooling, etc.).

As shown in fig. 1, during a battery test, a battery 10 to be tested and a cooling module 20 to be tested for cooling the battery 10 to be tested are placed in a sealed case 110. The first controlled air path 120 is located between the first air source 1 and the battery 10 to be tested. The first controlled gas circuit 120 may regulate the pressure of the first gas source 1. When the first controlled air path 120 communicates the first air source 1 with the inside of the case of the battery 10 to be measured, the function of exhausting air from the inside of the case of the battery 10 to be measured or inflating air into the inside of the case of the battery 10 to be measured can be realized according to the pressure value set by the first air source 1. The second controlled air path 130 is located between the second air source 2 and the cooling module 20 to be tested. The second controlled gas circuit 130 may regulate the pressure of the second gas source 2. When the second controlled air path 130 communicates the second air source 2 with the interior of the housing of the cooling module 20 to be tested, the function of exhausting air from the interior of the housing of the cooling module 20 to be tested or inflating air into the interior of the housing of the cooling module 20 to be tested can be realized according to the set pressure value of the second air source 2. When the seal detection gas path 140 communicates with the inside of the case of the seal box 110, the seal detection gas path 140 can detect the sealing performance of the battery 10 to be tested and the cooling assembly 20 to be tested.

Through setting up two controlled gas circuits, can realize treating the battery and await measuring the cooling module simultaneously and test, improve the detection efficiency that the leakproofness detected, reduce required human cost, can improve test equipment's integrated level simultaneously, reduce test equipment's occupation of land size.

To reduce the impact of the test environment during the test, a tracer gas may be used to test the sealing performance of the battery 10 under test and the cooling assembly 20 under test. The first gas source 1 can charge the first tracer gas into the interior of the housing of the battery 10 to be tested through the first controlled gas path 120, and the second gas source 2 can charge the second tracer gas into the interior of the housing of the cooling assembly 20 to be tested through the second controlled gas path 130. If the sealing performance of the battery 10 to be tested does not meet the requirement, the first tracer gas charged therein is leaked into the seal box 110; if the sealing performance of the cooling module 20 to be tested is not satisfactory, the second tracer gas charged therein may be leaked into the seal box 110. The seal detection gas path 140 may detect contents of the first trace gas and the second trace gas inside the housing of the seal box 110, and determine sealing performance of the battery 10 to be tested and the cooling assembly 20 to be tested according to a preset detection standard.

It should be appreciated that the first trace gas and the second trace gas may be different trace gases or the same trace gas (e.g., helium). In the case that the first trace gas is different from the second trace gas, the seal detection gas path 140 may detect the first trace gas and the second trace gas inside the housing of the seal box 110, respectively, to determine the sealing performance of the battery 10 to be tested and the cooling assembly 20 to be tested. Under the condition that the first trace gas is the same as the second trace gas, the seal detection gas circuit 140 can detect the trace gas in the shell of the seal box 110, and if the preset detection standard is met, the seal performance of the battery 10 to be detected and the cooling assembly 20 to be detected are determined to meet the requirement; if the preset detection standard is not met, it is determined that the sealing performance of at least one of the battery 10 to be detected and the cooling assembly 20 to be detected is not met, and whether leakage points exist on the shells of the battery 10 to be detected and the cooling assembly 20 to be detected is further determined in the subsequent detection process.

By using the trace gas to detect the sealing performance of the battery to be detected and the cooling component to be detected (for example, a normal pressure accumulation helium detection method), compared with a detection method for detecting pressure, the detection result is less influenced by the ambient temperature, the defect of a product can be effectively identified, and the detection accuracy is improved.

As shown in fig. 1, when the first on-off valve 141 is opened, the gas leak detector 142 communicates with the housing of the seal box 110, so that the first trace gas and the second trace gas in the seal box 110 can be detected. When the first on-off valve 141 is closed, the gas leak detector 142 is not in communication with the housing of the seal box 110.

The opening and closing of the first on-off valve 141 may be set according to the detection requirement. In some embodiments, the first on-off valve 141 may be opened in the case where the battery 10 to be measured and the cooling assembly 20 to be measured have been filled with sufficient first trace gas and second trace gas, respectively. The degree of leakage of the trace gas charged into the battery 10 to be measured and the cooling assembly 20 to be measured is determined by comparing the changes of the trace gas detected by the gas leak detector 142 before and after the first on-off valve 141 is opened, thereby determining the sealing performance of the battery 10 to be measured and the cooling assembly 20 to be measured.

Through setting up first on-off valve, can be according to the use needs with gas leak detector and seal box casing selectivity intercommunication, just make gas leak detector detect the inside tracer gas of seal box casing when meeting the test requirement, improve flexibility and the accuracy of detection.

According to some embodiments of the present application, referring to fig. 2, the seal-detecting gas path 140 may further include a suction gun 144 and a second on-off valve 143.

The suction gun 144 is configured to suck gas.

A second on-off valve 143 is connected between the suction gun 144 and the gas leak detector 142 and is configured to selectively communicate the suction gun 144 with the gas leak detector 142.

In embodiments of the present application, the term "suction gun" may include various components for sucking gas. When the suction gun is in communication with the gas leak detector, the gas drawn by the suction gun may be transferred to the gas leak detector. As shown in fig. 2, when the gas leak detector 142 detects that the sealing performance of the battery 10 to be tested and/or the cooling assembly 20 to be tested does not meet the requirement according to the first trace gas and the second trace gas in the seal box 110, the first on-off valve 141 may be closed, the second on-off valve 143 may be opened, the suction gun 144 may be communicated with the gas leak detector 142, and the suction gun 144 may be used to further locate a leak on the housing of the battery 10 to be tested and/or the cooling assembly 20 to be tested. The process of locating the leak will be described in detail later.

And a suction gun is arranged in the seal detection gas circuit, and when the gas leak detector detects that the battery to be detected and/or the cooling component to be detected have leakage, the suction gun can be further used for accurately determining the leakage position.

According to some embodiments of the application, referring to fig. 2, the first controlled gas circuit 120 may include a first pressure regulating valve 121 and a third cut-off valve 122.

The first pressure regulating valve 121 is connected to the first air source 1 and is configured to regulate the pressure of the first air source 1.

The third cut-off valve 122 is connected to the first pressure regulating valve 121, and is configured to selectively communicate the first pressure regulating valve 121 with the inside of the case of the battery 10 to be measured.

As shown in fig. 2, the first pressure regulating valve 121 is connected to the first air source 1, and the pressure of the first air source 1 can be regulated by adjusting the first pressure regulating valve 121, so that the air inside the casing of the battery 10 to be measured is pumped or the air inside the casing of the battery 10 to be measured is inflated according to the use requirement. In an example, the first pressure regulating valve 121 may use an electrically controlled pressure regulating valve, the accuracy of which may be 100 pa or less, the action delay of which is 0.1 seconds or less, and may have a closed loop feedback function.

The third cut-off valve 122 is connected to the first pressure regulating valve 121, and is located between the first pressure regulating valve 121 and the battery 10 to be measured. When the third three-way shut-off valve 122 is opened, the first pressure regulating valve 121 communicates with the inside of the casing of the battery 10 to be measured, and can realize air suction from the inside of the casing of the battery 10 to be measured or air inflation to the inside of the casing of the battery 10 to be measured. When the third cut-off valve 122 is closed, the first pressure regulating valve 121 is not in communication with the inside of the case of the battery 10 to be measured.

The pressure regulating valve and the on-off valve are arranged in the first controlled air passage, so that the pressure of the first air source can be regulated according to detection requirements, whether the first air source inflates the inside of the battery shell to be detected or not can be controlled, the application scene of the battery test system is expanded, and meanwhile, the safety of the detection process is improved.

According to some embodiments of the application, referring to fig. 2, the second controlled gas circuit 130 may include a second pressure regulating valve 131 and a fourth shut-off valve 132.

The second pressure regulating valve 131 is connected to the second air source 2 and is configured to regulate the pressure of the second air source 2.

The fourth on-off valve 132 is connected to the second pressure regulating valve 131, and is configured to selectively communicate the second pressure regulating valve 131 with the inside of the housing of the cooling module 20 to be tested.

As shown in fig. 2, the second pressure regulating valve 131 is connected to the second air source 2, and the pressure of the second air source 2 can be regulated by adjusting the second pressure regulating valve 131, so as to extract the air inside the housing of the cooling module 20 to be measured or charge the air inside the housing of the cooling module 20 to be measured according to the use requirement. In an example, the second pressure regulating valve 131 may use an electrically controlled pressure regulating valve, the accuracy of which may be 100 pa or less, the action delay of which is 0.1 seconds or less, and may have a closed loop feedback function.

The fourth on-off valve 132 is connected to the second pressure regulating valve 131, and is located between the second pressure regulating valve 131 and the cooling module 20 to be tested. When the fourth on-off valve 132 is opened, the second pressure regulating valve 131 is communicated with the inside of the housing of the cooling module 20 to be tested, so that air can be pumped from the inside of the housing of the cooling module 20 to be tested or air can be inflated into the inside of the housing of the battery 10 to be tested. When the fourth on-off valve 132 is closed, the second pressure regulating valve 131 is not communicated with the inside of the housing of the cooling module 20 to be tested.

The pressure regulating valve and the on-off valve are arranged in the second controlled air passage, so that the pressure of the second air source can be regulated according to detection requirements, whether the second air source inflates the inside of the cooling assembly shell to be detected or not can be controlled, the application scene of the battery test system is expanded, and meanwhile, the safety of the detection process is improved.

According to some embodiments of the present application, referring to fig. 2, the battery test system 100 further includes a first pressure gauge 123 and a second pressure gauge 133.

The first pressure gauge 123 is disposed in the first controlled gas path 120 and communicates with the inside of the case of the battery 10 to be measured, and is configured to detect the pressure inside the case of the battery 10 to be measured.

The second pressure gauge 133 is disposed in the second controlled air path 130 and communicates with the inside of the housing of the cooling module 20 to be measured, and is configured to detect the pressure inside the housing of the cooling module 20 to be measured.

As shown in fig. 2, the first pressure gauge 123 and the second pressure gauge 133 are respectively connected with the battery 10 to be measured and the cooling assembly 20 to be measured, so that the pressures inside the casings of the battery 10 to be measured and the cooling assembly 20 to be measured can be detected to judge the states of the battery 10 to be measured and the cooling assembly 20 to be measured, and simultaneously, the sealing performance of the battery 10 to be measured and the cooling assembly 20 to be measured can be assisted to be detected.

In an example, the first pressure gauge 123 and the second pressure gauge 133 may have an accuracy of 1 Pa or less, a data acquisition interval of 0.01 seconds or less, and a data upload delay of 0.01 seconds or less.

The pressure gauge is arranged in the battery test system, the pressure inside the shell of the battery to be tested and the pressure inside the shell of the cooling assembly to be tested are detected, so that the pressure conditions inside the shells of the battery to be tested and the cooling assembly to be tested can be conveniently obtained in the test process, the detection result is more accurate, and meanwhile, the safety of the detection process is improved.

According to some embodiments of the present application, referring to fig. 2, battery test system 100 further includes an electrical performance detection device 150.

The electrical property detection device 150 is electrically connected to the battery 10 to be tested and configured to detect the electrical property of the battery 10 to be tested.

As shown in fig. 2, the electrical performance detecting device 150 is electrically connected to the battery 10 to be detected, and may detect the electrical performance of the battery 10 to be detected independently, or detect the sealing performance of the battery 10 to be detected at the same time. In some embodiments, the electrical performance detection device 150 may be used to perform End-of-Life (EOL) testing of the battery 10 under test.

By arranging the electrical property detection device in the battery test system, the tightness detection and the electrical property detection can be performed in parallel, the time required by the battery test is shortened, the production efficiency is improved, and the production cost is reduced.

According to some embodiments of the present application, referring to fig. 2, battery testing system 100 further includes a connection assembly 160. The connection assembly 160 is disposed inside the housing of the sealing case 110. The first controlled air path 120 and the electrical performance detecting device 150 are connected to the battery 10 to be tested through the connecting assembly 160.

As shown in fig. 2, the connection assembly 160 may be an integrated connection tool integrating various connection functions. In some embodiments, the connection assembly 160 may include an air path connection to the first controlled air path 120 and an electrical connection to the electrical performance detection apparatus 150. The first controlled air path 120 is connected with the battery 10 to be measured through the connection assembly 160, so that the function of exhausting air from the inside of the case of the battery 10 to be measured or inflating air into the inside of the case of the battery 10 to be measured can be realized. Meanwhile, the electrical performance detecting device 150 is electrically connected with the battery 10 to be detected through the connection assembly 160, so that a function of detecting the electrical performance of the battery 10 to be detected can be realized.

The first controlled gas circuit and the electrical property detection device are connected with the battery to be tested through the same connecting component, so that the number of tools required by testing is reduced, and the work loss and the tool cost can be reduced.

The embodiment of the application provides a battery testing method 300, which is applied to the battery testing system 100 described in the above embodiment. Referring to fig. 3, the battery testing method 300 includes steps 310 through 360.

In step 310, the first controlled pneumatic circuit 120 is controlled to adjust the pressure of the first air source 1 to a first preset pressure.

In step 320, the first controlled air path 120 is controlled to communicate the first air source 1 with the interior of the housing of the battery 10 to be tested, so that the first air source 1 inflates the interior of the housing of the battery 10 to be tested through the first controlled air path 120.

In step 330, the second controlled air path 130 is controlled to adjust the pressure of the second air source 2 to a second preset pressure.

In step 340, the second controlled air path 130 is controlled to communicate the second air source 2 with the interior of the housing of the cooling module 20 to be tested, such that the second air source 2 inflates the interior of the housing of the cooling module 20 to be tested through the second controlled air path 130.

In step 350, the seal detection air path 140 is controlled to communicate with the interior of the housing of the seal box 110. Step 350 includes: the first on-off valve 141 is controlled to open to communicate the inside of the housing of the seal box 110 with the gas leak detector 142.

In step 360, the seal detection gas circuit 140 is controlled to detect the sealing performance of the battery 10 to be tested and the cooling module 20 to be tested. Step 360 includes: the control gas leak detector 142 detects the first trace gas and the second trace gas.

As shown in fig. 3, in step 310 and step 330, a first preset pressure and a second preset pressure may be set, respectively, according to test requirements. The first preset pressure and the second preset pressure may be the same or different, and the present disclosure is not limited thereto. In some embodiments, the first and second preset pressures may be set to be greater than the current pressures inside the housing of the battery under test 10 and the cooling assembly under test 20, respectively (e.g., the first and second preset pressures may each be set to 100 kilopascals (KPa)), such that the first and second air sources 1 and 2 may be caused to inflate the housing interiors of the battery under test 10 and the cooling assembly under test 20, respectively. It should be noted that, the execution sequence of step 310 and step 320, and the execution sequence of step 330 and step 340 are not limited in this disclosure, step 310 may be performed before or after step 320, step 330 may be performed before or after step 340, and step 310 and step 320 may be performed before or after step 330 and step 340.

The pressure of two air sources is respectively set through the two controlled air paths, so that the two air sources respectively inflate the battery to be tested and the shell of the cooling assembly to be tested, the battery to be tested and the cooling assembly to be tested can be tested simultaneously, the detection efficiency of tightness detection is improved, the required labor cost is reduced, the integration level of the test equipment can be improved, and the occupied area of the test equipment is reduced.

As shown in fig. 1, the first on-off valve 141 is opened, and the inside of the casing of the sealing case 110 may be communicated with the gas leakage detector 142, so that the gas leakage detector 142 may detect the first trace gas and the second trace gas in the sealing case 110 to determine the sealing performance of the cooling module 20 to be tested of the battery 10 to be tested.

It will be appreciated that the first and second tracer gases may be different gases or the same gas. The detection modes in the two cases are as described above, and are not described here again.

In some embodiments, error reporting rules for trace gas leakage levels may also be set. When the rate of change of the trace gas detected by the gas leak detector 142 exceeds the error reporting rule, it is considered that an unstable factor may exist in the test environment, and the operations such as alarming, stopping the test and checking the battery test system 100 may be performed according to the requirement. Error reporting rules of the trace gas leakage degree can be designed according to a test scene, for example, the change amplitude of the trace gas within 10 seconds can be set to be more than +/-30%, and the like, and the trace gas leakage degree error reporting rules are not limited in the disclosure.

According to the use needs with gas leak detector and seal box casing selectivity intercommunication, detect the sealing performance of awaiting measuring battery and awaiting measuring cooling module through detecting the inside tracer gas of seal box casing, can effectively discern the product defect, improve flexibility and the accuracy of detection.

According to some embodiments of the present application, gas leak detector 142 is configured to detect the concentration of the first trace gas and the second trace gas inside the housing of seal box 110 in communication with the housing interior of seal box 110. The seal detection air path 140 further includes: a suction gun 144 and a second on-off valve 143 connected between the suction gun 144 and the gas leak detector 142. The battery testing method 300 further includes performing steps 410 and 420 after step 360, as shown in fig. 4.

In step 410, when the gas leak detector 142 detects that the variation value of the concentration of the first trace gas before and after the first on-off valve 141 is opened is greater than the first predetermined threshold value, the first on-off valve 141 is controlled to be closed, the second on-off valve 143 is controlled to be opened, and the suction gun 144 is used to suck gas from the casing of the battery 10 to be detected for the gas leak detector 142 to detect, so as to locate the leak point on the casing of the battery 10 to be detected.

In step 420, in the event that the gas leak detector 142 detects that the concentration of the second trace gas is greater than the second predetermined threshold value before and after the first on-off valve 141 is opened, the first on-off valve 141 is controlled to close, the second on-off valve 143 is controlled to open, and a suction gun 144 is used to draw gas from the housing of the cooling assembly 20 to be tested for detection by the gas leak detector 142 to locate a leak on the housing of the cooling assembly 20 to be tested.

Before and after the first on-off valve 141 is opened, the gas leak detector 142 may detect the concentration of the first trace gas and the second trace gas, respectively. If the variation value of the concentration of the first trace gas before and after the first on-off valve 141 is opened is greater than the first predetermined threshold value, it is considered that the sealing performance of the battery 10 to be measured does not meet the requirement. If the value of the change in the concentration of the second trace gas before and after the first on-off valve 141 is opened is greater than the second predetermined threshold, the sealing performance of the cooling module 20 to be tested is considered to be unsatisfactory. The first predetermined threshold and the second predetermined threshold may be set according to test requirements, which is not limited by the present disclosure.

It should be noted that a total trace gas variation threshold may be set. In the case where the first trace gas and the second trace gas are the same, if the gas leak detector 142 detects that the value of the change in the total concentration of the trace gas before and after the first on-off valve 141 is opened is greater than the trace gas change threshold, it is considered that the sealing performance of at least one of the battery 10 to be tested and the cooling assembly 20 to be tested is not satisfactory, at which time both step 410 and step 420 may be performed to locate the leak.

When it is determined that the sealing performance of the battery 10 to be tested and/or the cooling module 20 to be tested does not meet the requirement, the first on-off valve 141 is closed, the second on-off valve 143 is opened, the sealing box 110 is opened, the gas is sucked from the housing of the battery 10 to be tested and/or the cooling module 20 to be tested by using the suction gun 144, and the gas leak detector 142 is connected with the suction gun 144 through the second on-off valve 143. The gas sucked by the suction gun 144 from the battery 10 to be tested and/or the housing of the cooling assembly 20 to be tested can enter the gas leakage detector 142 through the second on-off valve 143, and the gas leakage detector 142 can detect the gas sucked by the suction gun 144, so as to determine the leakage point on the battery 10 to be tested and/or the housing of the cooling assembly 20 to be tested.

When the gas leak detector detects the tracer gas to determine that leakage exists in the battery to be detected and/or the cooling component to be detected, the suction gun can be further used for accurately determining the leakage position, the detection precision is improved, and meanwhile, the follow-up product repair and other procedures are facilitated.

According to some embodiments of the present application, the first controlled gas circuit 120 includes a first pressure regulating valve 121 connected to the first gas source 1 and a third cut-off valve 122 connected to the first pressure regulating valve 121. The second controlled gas path 130 includes a second pressure regulating valve 131 connected to the second gas source 2 and a fourth on-off valve 132 connected to the second pressure regulating valve 131.

Step 310 includes: the first pressure regulating valve 121 is controlled to regulate the pressure of the first air source 1 to a first preset pressure.

Step 320 includes: the third three-way shut-off valve 122 is controlled to open to communicate the first air source 1 with the inside of the case of the battery 10 to be measured.

Step 330 includes: the second pressure regulating valve 131 is controlled to regulate the pressure of the second air source 2 to a second preset pressure.

Step 340 includes: the fourth shut-off valve 132 is controlled to open to communicate the second air source 2 with the interior of the housing of the cooling module 20 to be tested.

The control of the first pressure regulating valve 121, the second pressure regulating valve 131, the third cut-off valve 122 and the fourth cut-off valve 132 is as described above, and will not be described again here.

The pressure regulating valve and the on-off valve are arranged in the controlled air passage, so that the pressure of the air source can be respectively regulated according to detection requirements, whether the air source inflates the battery to be detected and/or the shell of the cooling assembly to be detected or not can be respectively controlled, the application scene of the battery test system is expanded, and meanwhile, the safety of the detection process is improved.

According to some embodiments of the present application, the battery test system 100 further includes a first pressure gauge 123 and a second pressure gauge 133. The first pressure gauge 123 is disposed in the first controlled air path 120 and communicates with the interior of the housing of the battery 10 to be tested. The second pressure gauge 133 is disposed in the second controlled air path 130 and communicates with the interior of the housing of the cooling module 20 to be tested. Referring to fig. 5 and 6, battery testing method 300 also includes process 500 and process 600.

Process 500 includes steps 510 through 520 following step 320.

In step 510, the first pressure gauge 123 is controlled to detect the pressure inside the case of the battery 10 to be measured.

In step 520, in response to the pressure inside the casing of the battery 10 to be tested meeting the first pressure condition, the third three-way shut-off valve 122 is controlled to close so that the first air source 1 is not communicated with the inside of the casing of the battery 10 to be tested.

Process 600 includes steps 610 through 620 after step 340.

In step 610, the second pressure gauge 133 is controlled to detect the pressure inside the housing of the cooling module 20 to be tested.

In response to the pressure within the housing of the cooling module 20 to be tested meeting the second pressure condition, the fourth shut-off valve 132 is controlled to close such that the second air source 2 is not in communication with the housing of the cooling module 20 to be tested 620.

After step 320, the pressure inside the case of the battery 10 to be measured may be detected using the first pressure gauge 123 to determine whether the first pressure condition is satisfied. The first pressure condition may be set according to the detection requirement, for example, may be set to a specific pressure value, a deviation range from a first preset pressure, a change slope range of the pressure value, or a combination of a plurality of pressure conditions. In an example, the first pressure condition may be set such that the pressure inside the case of the battery 10 to be measured reaches a specified pressure range, and the change gradient of the pressure is ++0.5 Pa/s. When the pressure inside the case of the battery 10 to be measured satisfies the first pressure condition, the third three-way shut-off valve 122 is closed, and the inside of the case of the battery 10 to be measured is not inflated any more.

After step 340, the pressure inside the housing of the cooling assembly 20 to be tested may be detected using the second pressure gauge 133 to determine whether the second pressure condition is met. The second pressure condition may be set according to the detection requirement, for example, may be set to a specific pressure value, a deviation range from a second preset pressure, a change slope range of the pressure value, or a combination of a plurality of pressure conditions. The second pressure condition may be the same as or different from the first pressure condition. In an example, the second pressure condition is the same as the first pressure condition, is set such that the pressure inside the housing of the cooling module 20 to be measured reaches a specified pressure range, and the slope of the change in pressure is less than or equal to + -0.5 Pa/s. When the pressure inside the housing of the cooling module 20 to be tested satisfies the second pressure condition, the fourth shut-off valve 132 is closed and the housing of the cooling module 20 to be tested is not inflated.

In some embodiments, steps 350 and 360 may be performed after closing the third and fourth on-off valves 122 and 132.

In some embodiments, a first cutoff time threshold may be set. If the pressure inside the housing of the battery under test 10 does not still satisfy the first pressure condition and/or the pressure inside the housing of the cooling module under test 20 does not still satisfy the second pressure condition for a period of time that continues to exceed the first cutoff time threshold, steps 350 and 360 may be performed directly, or an alarm may be raised to prompt the detection of the battery test system 100.

In some embodiments, a pressure rise condition may be set. If the first pressure gauge 123 detects that the pressure rising slope of the inside of the casing of the battery 10 to be tested does not meet the pressure rising condition, it is considered that the battery test system 100 may have an abnormality, and the charging of the inside of the casing of the battery 10 to be tested is stopped; if the second pressure gauge 133 detects that the pressure rising slope of the inside of the case of the cooling module 20 to be tested does not satisfy the pressure rising condition, it is considered that the battery test system 100 may have an abnormality, and the inflation of the inside of the case of the cooling module 20 to be tested is stopped. The pressure rising conditions for the battery 10 to be measured and the cooling module 20 to be measured may be the same or different.

When the pressure gauge detects that the pressure inside the shell of the battery to be tested and/or the cooling assembly to be tested meets the respective preset pressure conditions, the corresponding on-off valve is closed, so that the air source does not charge air into the shell of the battery to be tested and/or the cooling assembly to be tested, and the safety risk possibly caused by overlarge pressure is reduced.

Referring to fig. 7 and 8, the battery testing method 300 further includes a process 700 and a process 800, according to some embodiments of the application.

Process 700 includes steps 710 through 750 prior to step 310.

In step 710, the first pressure regulating valve 121 is controlled to regulate the pressure of the first air source 1 to a third preset pressure.

In step 720, the third three-way shut-off valve 122 is controlled to be opened to communicate the first air source 1 with the interior of the housing of the battery 10 to be tested, so that the first air source 1 draws air from the interior of the housing of the battery 10 to be tested through the first controlled air path 120.

In step 730, the first pressure gauge 123 is controlled to detect the pressure inside the case of the battery 10 to be measured.

In step 740, in response to the pressure inside the housing of the battery 10 to be tested meeting the third pressure condition, the third three-way shut-off valve 122 is controlled to close so that the first air source 1 is not in communication with the inside of the housing of the battery 10 to be tested.

Step 750 determines whether a deviation value between the pressure inside the case of the battery 10 to be measured and the third preset pressure exceeds a third predetermined threshold.

Process 800 includes steps 810 through 850 prior to step 330.

In step 810, the second pressure regulating valve 131 is controlled to regulate the pressure of the second air source 2 to a fourth preset pressure.

In step 820, the fourth shut-off valve 132 is controlled to open to communicate the second air source 2 with the interior of the housing of the cooling module 20 to be tested, such that the second air source 2 draws air from the interior of the housing of the cooling module 20 to be tested through the second controlled air path 130.

In step 830, the second pressure gauge 133 is controlled to detect the pressure inside the housing of the cooling module 20 to be tested.

In response to the pressure within the housing of the cooling module 20 to be tested satisfying the fourth pressure condition, the fourth shut-off valve 132 is controlled to close such that the second air source 2 is not in communication with the housing of the cooling module 20 to be tested, step 840.

At step 850, it is determined whether the deviation between the pressure inside the housing of the cooling assembly 20 to be tested and the fourth preset pressure exceeds a fourth predetermined threshold.

Before the battery 10 to be tested and the housing of the cooling module 20 to be tested are inflated, it is necessary to determine whether there is leakage in the battery 10 to be tested and the housing of the cooling module 20 to be tested, so that a more accurate test result is obtained. In steps 710 and 810, a third preset pressure and a fourth preset pressure may be set, respectively, according to test requirements. The third preset pressure and the fourth preset pressure may be the same or different, and the present disclosure is not limited thereto. In some embodiments, the third preset pressure and the fourth preset pressure may be set to be less than the current pressures inside the housing of the battery under test 10 and the cooling assembly under test 20, respectively, so that the first air source 1 and the second air source 2 may be caused to suck air from the inside of the housing of the battery under test 10 and the cooling assembly under test 20, respectively.

In step 730, the pressure inside the case of the battery 10 to be measured may be detected using the first pressure gauge 123 to determine whether the third pressure condition is satisfied. The third pressure condition may be set according to the detection requirement, and may be set to a specific pressure value, a deviation range from a third preset pressure, a change slope range of the pressure value, or a combination of a plurality of pressure conditions, for example. In an example, the third pressure condition may be set such that the pressure inside the case of the battery 10 to be measured reaches a third preset pressure. In step 740, when the pressure inside the case of the battery 10 to be measured satisfies the third pressure condition, the third three-way shut-off valve 122 is closed, and no air is drawn from inside the case of the battery 10 to be measured. In step 750, the first pressure gauge 123 detects the pressure inside the case of the battery 10 to be measured in a state where the third three-way shut-off valve 122 is kept closed, and determines whether the deviation value thereof from the third preset pressure exceeds a third predetermined threshold value. It should be noted that, the deviation value between the pressure inside the casing of the battery 10 to be measured and the third preset pressure may be a difference value between the pressure values, and the third preset threshold may be a preset pressure difference value at this time; the variation range of the pressure variation value inside the casing of the battery 10 to be measured with respect to the third preset pressure within a period of time may be a preset pressure range; similarly, whether the third predetermined threshold is exceeded may be determined according to data such as a pressure change rate, a pressure fluctuation range, etc. inside the case of the battery 10 to be measured, which is not limited by the present disclosure.

In step 830, the pressure inside the housing of the cooling assembly 20 under test may be detected using the second pressure gauge 133 to determine whether the fourth pressure condition is met. The fourth pressure condition may be set according to the detection requirement, and may be set as a specific pressure value, a deviation range from the fourth preset pressure, a change slope range of the pressure value, or a combination of a plurality of pressure conditions, for example. In an example, the fourth pressure condition may be set such that the pressure inside the housing of the cooling assembly 20 to be measured reaches a fourth preset pressure. In step 840, when the pressure inside the housing of the cooling module 20 to be tested satisfies the fourth pressure condition, the fourth shut-off valve 132 is closed and no air is drawn from inside the housing of the battery 10 to be tested. In step 850, the second pressure gauge 133 detects the pressure inside the housing of the cooling module 20 to be tested in a state where the fourth shut-off valve 132 is kept closed, and determines whether the deviation value thereof from the fourth preset pressure exceeds a fourth predetermined threshold value. It should be noted that, the deviation value between the pressure inside the housing of the cooling module 20 to be measured and the fourth preset pressure may be a difference value between the pressure values, and the fourth preset threshold may be a preset pressure difference value; the change range of the pressure inside the housing of the cooling module 20 to be measured with respect to the fourth preset pressure within a period of time may be the fourth preset threshold value, which may be a preset pressure range; similarly, whether the fourth predetermined threshold is exceeded may also be determined according to data such as a pressure change rate, a pressure fluctuation range, etc. inside the housing of the cooling module 20 to be tested, which is not limited by the present disclosure.

It should be noted that, the present disclosure does not limit the execution sequence of steps 710 to 750 and steps 810 to 850, and steps 710 to 750 may be executed before or after steps 810 to 850.

In some embodiments, when it is determined that the deviation value between the pressure inside the case of the battery 10 to be measured and the third preset pressure does not exceed the third predetermined threshold, step 310 is performed; when it is determined that the deviation value between the pressure inside the housing of the cooling assembly 20 to be measured and the fourth preset pressure does not exceed the fourth predetermined threshold, step 330 is performed.

In some embodiments, a second cutoff time threshold may be set. If the pressure within the housing of the battery under test 10 does not yet meet the third pressure condition or the pressure within the housing of the cooling assembly under test 20 does not yet meet the fourth pressure condition for a period of time that continues to exceed the second cutoff time threshold, an alarm may be raised prompting detection of the battery test system 100.

In some embodiments, a pressure drop condition may be set. If the first pressure gauge 123 detects that the pressure drop slope in the casing of the battery 10 to be tested does not meet the pressure drop condition, it is considered that the battery test system 100 may have an abnormality, and the air extraction from the casing of the battery 10 to be tested is stopped, and an alarm may be sent, and the third three-way shut-off valve 122 is closed; if the second pressure gauge 133 detects that the pressure drop gradient in the housing of the cooling module 20 to be tested does not meet the pressure drop condition, it is considered that the battery test system 100 may have an abnormality, and the air suction from the housing of the cooling module 20 to be tested is stopped, and an alarm may be sent to close the fourth shut-off valve 132. The pressure drop conditions for the battery under test 10 and the cooling module under test 20 may be the same or different. In an example, the same pressure drop condition is set for the battery under test 10 and the cooling module under test 20, and may be, for example, a pressure drop rate >100 Pa/s (Pa/s) in the first 3 seconds.

Before the inside of the shell of the battery to be tested and the shell of the cooling component to be tested are inflated, air is firstly pumped from the inside of the shell of the battery to be tested and the shell of the cooling component to be tested respectively, whether air leakage exists in the shell of the battery to be tested and the shell of the cooling component to be tested or not is determined according to the detection result of the pressure gauge, then the inside of the shell of the battery to be tested and the shell of the cooling component to be tested is inflated, the sealing performance of the battery to be tested and the cooling component to be tested is further detected by using a sealing detection air path, and the accuracy of the detection result is improved.

According to some embodiments of the present application, the battery test system 100 further includes an electrical performance detection device 150 electrically connected to the battery 10 under test. The battery testing method 300 further includes:

the control electric property detecting means 150 detects the electric property of the battery 10 to be measured.

The electrical performance detecting device 150 is electrically connected to the battery 10 to be tested, and may be directly connected to the battery 10 to be tested, or may be electrically connected to the battery 10 to be tested through the connecting assembly 160 as shown in fig. 2. The electrical performance detecting device 150 may be controlled to detect the electrical performance of the battery 10 to be detected independently, or the electrical performance detecting device 150 may be controlled to detect the sealing performance of the battery 10 to be detected while detecting the electrical performance.

The sealing performance and the electrical performance of the battery to be tested are detected in parallel, so that the time required by testing the battery can be shortened, the production efficiency is improved, and the production cost is reduced.

One specific embodiment of the present application is described below. It should be understood that this particular embodiment is described for illustrative purposes only and should not be construed as limiting the application.

As shown in fig. 1, the battery test system 100 includes a sealed box 110, a first controlled gas path 120, a second controlled gas path 130, and a seal detection gas path 140. The battery to be measured 10 and the cooling module to be measured 20 for cooling the battery to be measured 10 are accommodated in the sealed case 110. As shown in fig. 2, the first controlled gas path 120 includes a first pressure regulating valve 121 and a third on-off valve 122, the second controlled gas path 130 includes a second pressure regulating valve 131 and a fourth on-off valve 132, and the seal detection gas path 140 includes a gas leak detector 142, a suction gun 144, a first on-off valve 141, and a second on-off valve 143. The first pressure gauge 123 and the second pressure gauge 133 are disposed in the first controlled air path 120 and the second controlled air path 130, respectively, and are connected to the battery 10 to be measured and the cooling assembly 20 to be measured, respectively. The first controlled air path 120 and the electrical performance detecting device 150 are connected to the battery 10 to be tested through the connecting assembly 160.

During the battery test, the battery 10 to be tested and the cooling module 20 to be tested are connected into the battery test system 100. The pressure of the first air source 1 and the pressure of the second air source 2 are adjusted to a third preset pressure and a fourth preset pressure by the first pressure regulating valve 121 and the second pressure regulating valve 131, respectively. The third and fourth on-off valves 122 and 132 are opened to draw air from the battery 10 to be measured and the cooling module 20 to be measured, and simultaneously the pressures inside the cases of the battery 10 to be measured and the cooling module 20 to be measured are detected using the first and second pressure gauges 123 and 133, respectively. When the pressure inside the casing of the battery 10 to be measured reaches a third preset pressure, the third three-way shut-off valve 122 is closed; when the pressure inside the housing of the cooling module 20 to be tested reaches the fourth preset pressure, the fourth shut-off valve 132 is closed. The pressure changes inside the housings of the battery 10 to be measured and the cooling assembly 20 to be measured are detected using the first pressure gauge 123 and the second pressure gauge 133, respectively.

When it is determined that the deviation value between the pressure inside the case of the battery 10 to be measured and the third preset pressure does not exceed the third preset threshold value, the deviation value between the pressure inside the case of the cooling assembly 20 to be measured and the fourth preset pressure does not exceed the fourth preset threshold value, the pressure of the first air source 1 and the pressure of the second air source 2 are adjusted to the first preset pressure and the second preset pressure, respectively, by the first pressure regulating valve 121 and the second pressure regulating valve 131. The third and fourth shut-off valves 122 and 132 are opened, the first trace gas is charged into the interior of the case of the battery 10 to be measured, the second trace gas is charged into the interior of the case of the cooling assembly 20 to be measured, and the pressures inside the cases of the battery 10 to be measured and the cooling assembly 20 to be measured are detected using the first and second pressure gauges 123 and 133, respectively. When the pressure inside the case of the battery 10 to be measured reaches a specified pressure range and the slope of the change in pressure is less than or equal to + -0.5 Pa/s (Pa/s), the third cut-off valve 122 is closed; when the pressure inside the housing of the cooling module 20 to be measured reaches a specified pressure range and the slope of the change in pressure is less than or equal to + -0.5 Pa/s (Pa/s), the fourth shut-off valve 132 is closed.

The first on-off valve 141 is opened, the first trace gas and the second trace gas in the seal box 110 are detected using the gas leak detector 142, and the EOL test is performed on the battery 10 to be tested using the electrical property detection device 150. When the first trace gas and the second trace gas are the same trace gas (for example, helium), if the variation value of the total concentration of the trace gas before and after the first on-off valve 141 is opened is not greater than the trace gas variation threshold, the sealing performance of the battery 10 to be tested and the cooling assembly 20 to be tested is considered to meet the requirement; if the variation value of the total concentration of the trace gas before and after the first on-off valve 141 is opened is greater than the trace gas variation threshold value, it is considered that there is leakage of at least one of the battery 10 to be measured and the cooling module 20 to be measured. The first on-off valve 141 is closed, the second on-off valve 143 is opened, the sealing box 110 is opened, and the suction gun 144 is used for sucking gas from the battery 10 to be tested and the shell of the cooling assembly 20 to be tested for detection by the gas leak detector 142 so as to locate the leakage point, and subsequent fault location, repair and other procedures are performed. If the electrical performance detecting device 150 detects that the electrical performance of the battery 10 to be tested is abnormal, the test is stopped, and subsequent processes such as fault location and repair are performed.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A battery test system (100), comprising:

a seal box (110) configured to house a battery (10) to be measured and a cooling module (20) to be measured for cooling the battery (10) to be measured;

A first controlled gas circuit (120) configured to regulate the pressure of a first gas source (1) outside the sealed box (110) and selectively communicate the first gas source (1) with the interior of the casing of the battery (10) to be tested, so as to charge a first trace gas from the first gas source (1) into the interior of the casing of the battery (10) to be tested;

A second controlled air circuit (130) configured to regulate a pressure of a second air source (2) outside the sealed box (110) and selectively communicate the second air source (2) with the interior of the housing of the cooling assembly (20) to be tested, to charge a second trace gas from the second air source (2) into the interior of the housing of the cooling assembly (20) to be tested; and

A seal detection gas path (140) configured to selectively communicate with a housing interior of the seal box (110) and detect a sealing performance of the battery (10) under test by detecting a first trace gas inside the housing interior of the seal box (110) and detect a sealing performance of the cooling assembly (20) under test by detecting a second trace gas inside the housing interior of the seal box (110), the seal detection gas path (140) comprising:

a gas leak detector (142) configured to detect a first trace gas and a second trace gas inside a housing of the sealed box (110) in communication with the housing interior of the sealed box (110); and

A first on-off valve (141) connected between the housing of the seal box (110) and the gas leak detector (142) and configured to selectively communicate the interior of the housing of the seal box (110) with the gas leak detector (142).

2. The battery test system (100) of claim 1, wherein the seal-testing gas circuit (140) further comprises:

A suction gun (144) configured to suck a gas; and

A second on-off valve (143) connected between the suction gun (144) and the gas leak detector (142) configured to selectively communicate the suction gun (144) with the gas leak detector (142).

3. The battery testing system (100) of any of claims 1-2, wherein the first controlled gas path (120) comprises:

A first pressure regulating valve (121), connected to the first gas source (1), configured to regulate the pressure of the first gas source (1); and

And a third three-way shut-off valve (122) connected to the first pressure regulating valve (121) and configured to selectively communicate the first pressure regulating valve (121) with the inside of the case of the battery (10) to be measured.

4. The battery testing system (100) of any of claims 1-2, wherein the second controlled gas path (130) comprises:

A second pressure regulating valve (131), connected to the second air source (2), configured to regulate the pressure of the second air source (2); and

A fourth shut-off valve (132) connected to the second pressure regulating valve (131) and configured to selectively communicate the second pressure regulating valve (131) with the inside of the housing of the cooling module (20) to be measured.

5. The battery test system (100) of any of claims 1-2, further comprising:

A first pressure gauge (123) disposed in the first controlled gas path (120) and communicating with the interior of the housing of the battery (10) to be measured, configured to detect the pressure inside the housing of the battery (10) to be measured; and

And a second pressure gauge (133) disposed in the second controlled air path (130) and communicating with the interior of the housing of the cooling module (20) to be measured, and configured to detect the pressure inside the housing of the cooling module (20) to be measured.

6. The battery test system (100) of any of claims 1-2, further comprising:

and an electrical performance detection device (150) electrically connected with the battery (10) to be detected and configured to detect the electrical performance of the battery (10) to be detected.

7. The battery testing system (100) of claim 6, further comprising a connection assembly (160), the connection assembly (160) being disposed inside the housing of the sealed case (110), wherein the first controlled gas path (120) and the electrical performance detection device (150) are both connected to the battery (10) under test through the connection assembly (160).

8. A battery testing method (300) applied to the battery testing system (100) according to claim 1, comprising:

controlling the first controlled air path (120) to adjust the pressure of the first air source (1) to a first preset pressure;

Controlling the first controlled air path (120) to communicate the first air source (1) with the inside of the shell of the battery (10) to be tested, so that the first air source (1) charges air into the inside of the shell of the battery (10) to be tested through the first controlled air path (120);

controlling the second controlled air path (130) to adjust the pressure of the second air source (2) to a second preset pressure;

Controlling the second controlled air path (130) to communicate the second air source (2) with the inside of the shell of the cooling component (20) to be detected, so that the second air source (2) charges the inside of the shell of the cooling component (20) to be detected through the second controlled air path (130);

Controlling the seal detection air path (140) to communicate with the inside of the housing of the seal box (110), comprising: controlling the first on-off valve (141) to open to communicate the inside of the housing of the seal box (110) with the gas leak detector (142); and

Controlling the seal detection gas path (140) to detect the sealing performance of the battery (10) to be detected and the cooling assembly (20) to be detected, comprising: -controlling the gas leak detector (142) to detect the first trace gas and the second trace gas.

9. The battery testing method (300) of claim 8, wherein the gas leak detector (142) is configured to detect concentrations of the first trace gas and the second trace gas inside the housing of the seal box (110) in communication with the housing interior of the seal box (110), the seal detection gas circuit (140) further comprising: a suction gun (144) and a second on-off valve (143) connected between the suction gun (144) and the gas leak detector (142), wherein the battery testing method (300) further comprises:

When the gas leak detector (142) detects that the variation value of the concentration of the first trace gas before and after the first on-off valve (141) is opened is larger than a first preset threshold value, the first on-off valve (141) is controlled to be closed, the second on-off valve (143) is controlled to be opened, and the suction gun (144) is used for sucking gas from the shell of the battery (10) to be detected by the gas leak detector (142) so as to position a leakage point on the shell of the battery (10) to be detected;

And under the condition that the gas leak detector (142) detects that the change value of the concentration of the second trace gas before and after the first on-off valve (141) is opened is larger than a second preset threshold value, the first on-off valve (141) is controlled to be closed, the second on-off valve (143) is controlled to be opened, and the suction gun (144) is used for sucking gas from the shell of the cooling component (20) to be detected by the gas leak detector (142) so as to position a leakage point on the shell of the cooling component (20) to be detected.

10. The battery testing method (300) according to any one of claims 8-9, wherein the first controlled gas circuit (120) comprises a first pressure regulating valve (121) connected to the first gas source (1) and a third on-off valve (122) connected to the first pressure regulating valve (121), the second controlled gas circuit (130) comprises a second pressure regulating valve (131) connected to the second gas source (2) and a fourth on-off valve (132) connected to the second pressure regulating valve (131), wherein:

The controlling the first controlled gas circuit (120) to adjust the pressure of the first gas source (1) to a first preset pressure comprises: controlling the first pressure regulating valve (121) to regulate the pressure of the first air source (1) to the first preset pressure;

The controlling the first controlled air path (120) to communicate the first air source (1) with the interior of the housing of the battery (10) to be tested includes: controlling the third on-off valve (122) to be opened so as to communicate the first air source (1) with the inside of the shell of the battery (10) to be tested;

the controlling the second controlled gas circuit (130) to adjust the pressure of the second gas source (2) to a second preset pressure comprises: controlling the second pressure regulating valve (131) to regulate the pressure of the second air source (2) to the second preset pressure;

The controlling the second controlled air path (130) to communicate the second air source (2) with the interior of the housing of the cooling component (20) to be measured includes: and controlling the fourth on-off valve (132) to be opened so as to communicate the second air source (2) with the inside of the shell of the cooling component (20) to be tested.

11. The battery testing method (300) of claim 10, wherein the battery testing system (100) further comprises: the first pressure gauge (123) is arranged in the first controlled gas path (120) and is communicated with the inside of the shell of the battery (10) to be tested; and a second pressure gauge (133) disposed in the second controlled gas path (130) and in communication with the interior of the housing of the cooling assembly (20) to be tested, wherein the battery testing method (300) further comprises:

After the first controlled air path (120) is controlled to communicate the first air source (1) with the inside of the shell of the battery (10) to be tested,

Controlling the first pressure gauge (123) to detect the pressure inside the shell of the battery (10) to be detected; and

Controlling the third on-off valve (122) to be closed so that the first gas source (1) is not communicated with the inside of the casing of the battery (10) to be measured in response to the pressure inside the casing of the battery (10) to be measured satisfying a first pressure condition; and

After said controlling said second controlled air path (130) to communicate said second air source (2) with the interior of the housing of said cooling assembly (20) to be tested,

Controlling the second pressure gauge (133) to detect the pressure inside the housing of the cooling component (20) to be detected; and

And in response to the pressure inside the shell of the cooling component (20) to be detected meeting a second pressure condition, controlling the fourth on-off valve (132) to be closed so that the second air source (2) is not communicated with the inside of the shell of the cooling component (20) to be detected.

12. The battery testing method (300) of claim 11, further comprising:

Before the control of the first controlled gas circuit (120) to adjust the pressure of the first gas source (1) to a first preset pressure,

Controlling the first pressure regulating valve (121) to regulate the pressure of the first air source (1) to be a third preset pressure;

controlling the third on-off valve (122) to be opened so as to communicate the first air source (1) with the inside of the shell of the battery (10) to be tested, so that the first air source (1) pumps air from the inside of the shell of the battery (10) to be tested through the first controlled air path (120);

controlling the first pressure gauge (123) to detect the pressure inside the shell of the battery (10) to be detected;

controlling the third on-off valve (122) to be closed so that the first gas source (1) is not communicated with the inside of the casing of the battery (10) to be measured in response to the pressure inside the casing of the battery (10) to be measured meeting a third pressure condition; and

Determining whether a deviation value between a pressure inside a case of the battery (10) to be measured and the third preset pressure exceeds a third predetermined threshold; and

Before said controlling said second controlled air path (130) to adjust the pressure of said second air source (2) to a second preset pressure,

Controlling the second pressure regulating valve (131) to regulate the pressure of the second air source (2) to a fourth preset pressure;

Controlling the fourth on-off valve (132) to be opened so as to communicate the second air source (2) with the inside of the shell of the cooling component (20) to be tested, so that the second air source (2) pumps air from the inside of the shell of the cooling component (20) to be tested through the second controlled air path (130);

controlling the second pressure gauge (133) to detect the pressure inside the housing of the cooling component (20) to be detected;

Controlling the fourth on-off valve (132) to close so that the second air source (2) is not communicated with the interior of the housing of the cooling assembly (20) to be measured in response to the pressure inside the housing of the cooling assembly (20) to be measured meeting a fourth pressure condition; and

Determining whether a deviation value between a pressure inside a housing of the cooling assembly (20) to be measured and the fourth preset pressure exceeds a fourth predetermined threshold.

13. The battery testing method (300) according to any one of claims 8-9, wherein the battery testing system (100) further comprises an electrical performance detection device (150) electrically connected to the battery (10) under test, the battery testing method (300) further comprising:

and controlling the electrical property detection device (150) to detect the electrical property of the battery (10) to be detected.