Testing device and testing method for main-grid-free battery

Abstract

The invention discloses a testing device and a testing method for a main-grid-free battery. The testing device comprises a probe row and a control unit, the probe row is in communication connection with the control unit; the probe row comprises a first probe and a second probe; the first probe comprises a first sub-probe arranged along a first direction and a second sub-probe arranged along the first direction; the second sub-probes and the second probes are arranged in gaps between the adjacent first sub-probes; the control unit judges the current range of the to-be-detected battery according to the current signal and judges the voltage range of the to-be-detected battery according to the voltage signal. According to the technical scheme provided by the embodiment of the invention, the first probe and the second probe are arranged in the probe row of the test device, and the second sub-probe and the second probe in the first probe are arranged in the gap between the adjacent first sub-probes, so that the probes on the probe row can be in full contact with the grid line on the battery to be tested; therefore, the purpose of collecting current and voltage is achieved, and the accuracy and reliability in the testing process are improved.

Description

Technical Field

[0001] The invention relates to the technical field of solar cells, and in particular to a testing device and a testing method for a main grid-free cell. Background Art

[0002] As the industry's demand for cost reduction and efficiency improvement continues to increase, the busbar-free (0Busbar, 0BB) battery solution has emerged. However, this solution also brings many testing challenges. The original single-row probe test solution cannot meet the new 0BB battery requirements. The main reason is that the 0BB battery cancels the original battery cell busbar printing and only retains the fine grid line, making the traditional contact busbar electrode to collect current and voltage data no longer feasible, resulting in reduced test accuracy. Summary of the invention

[0003] The present invention provides a testing device and a testing method for a busbar-free battery, so as to solve the problem that the testing device in the prior art cannot fully contact the grid line, resulting in reduced testing accuracy.

[0004] According to one aspect of the present invention, there is provided a test device for a busbar-less battery, comprising: a probe row and a control unit;

[0005] The probe row is communicatively connected with the control unit;

[0006] The probe row includes a first probe and a second probe; the first probe includes a first sub-probe arranged along a first direction and a second sub-probe arranged along the first direction; the second sub-probe and the second probe are arranged in the gap between adjacent first sub-probes; wherein the first direction is the grid line arrangement direction of the battery to be tested;

[0007] The first probe is used to obtain the current signal of the gate line during the test and input the current signal into the control unit; the second probe is used to obtain the voltage signal of the gate line during the test and input the voltage signal into the control unit;

[0008] The control unit determines the current range of the battery to be tested according to the current signal, and determines the voltage range of the battery to be tested according to the voltage signal.

[0009] Optionally, along the first direction, adjacent second probes include first sub-probes.

[0010] Optionally, the number of first sub-probes between any adjacent second probes is the same.

[0011] Optionally, along the first direction, the size of the first probe and the second probe is smaller than the spacing between adjacent gate lines;

[0012] Along the first direction, the maximum distance between adjacent first sub-probes and second sub-probes is greater than or equal to the spacing between adjacent gate lines, and the maximum distance between adjacent first sub-probes and second sub-probes is greater than or equal to the spacing between adjacent gate lines.

[0013] Optionally, the projections of the first probe and the second probe on the plane where the battery to be tested is located are circular and both have a diameter of 2.5 mm.

[0014] Optionally, along the first direction, the distance between the center of the adjacent first sub-probes and the center of the second sub-probe is 2.6 mm; the distance between the center of the adjacent first sub-probes and the center of the second sub-probe is 2.6 mm.

[0015] Optionally, the probe row further includes a probe sleeve;

[0016] The first probe and the second probe sleeve are arranged on the probe shaft sleeve.

[0017] According to another aspect of the present invention, a method for testing a busbar-less battery is provided, which is applied in a testing device; the testing method comprises:

[0018] Acquire current signal and voltage signal;

[0019] The current range of the battery to be tested is determined according to the current signal, and the voltage range of the battery to be tested is determined according to the voltage signal.

[0020] Optionally, after determining the current range of the battery to be tested according to the current signal and determining the voltage range of the battery to be tested according to the voltage signal, the method further includes:

[0021] Determine whether the current of the battery to be tested is qualified according to the current range and the preset current threshold, and determine whether the voltage of the battery to be tested is qualified according to the voltage range and the preset voltage threshold;

[0022] When the current and voltage of the battery to be tested are both qualified, a qualified signal is output.

[0023] Optionally, after judging whether the current of the battery to be tested is qualified according to the current range and the preset current threshold, and judging whether the voltage of the battery to be tested is qualified according to the voltage range and the preset voltage threshold, the method further includes:

[0024] When the current and / or voltage of the battery to be tested fails to meet the requirements, an alarm signal is output.

[0025] The technical solution of the embodiment of the present invention is to set the first probe and the second probe in the probe row of the testing device, and set the second sub-probe and the second probe in the first probe in the gap between adjacent first sub-probes, so that the probes on the probe row can fully contact the gate lines on the battery to be tested, thereby achieving the purpose of collecting current and voltage, and improving the accuracy and reliability of the test process.

[0026] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 is a test schematic diagram of a busbar-free battery test device provided according to an embodiment of the present invention;

[0029] Figure 2 is a connection diagram of a busbar-free battery testing device provided according to an embodiment of the present invention;

[0030] Figure 3 is a connection diagram of a first busbar-free battery testing method provided according to an embodiment of the present invention;

[0031] Figure 4 is a connection diagram of a second busbar-free battery testing method provided in an embodiment of the present invention;

[0032] Figure 5 1 is a connection diagram of a third busbar-free battery testing method provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0035] A busbarless battery is a device that removes the busbar from the existing photovoltaic cell and only provides a thin grid. The test device in the prior art mainly collects current data and voltage data by contacting the busbar, so the test device in the prior art is not feasible for a busbarless battery. Therefore, an embodiment of the present invention provides a busbarless battery test device. Figure 1 is a test schematic diagram of a busbar-free battery test device provided according to an embodiment of the present invention, Figure 2 1 is a schematic diagram of the connection of a test device for a busbar-free battery according to an embodiment of the present invention. Figure 1 and Figure 2 As shown, a test device for a busbar-less battery is provided, comprising: a probe row 1 and a control unit 2;

[0036] The probe row 1 is communicatively connected with the control unit 2;

[0037] The probe row 1 includes a first probe 11 and a second probe 12; the first probe 11 includes a first sub-probe 111 arranged along a first direction x and a second sub-probe 112 arranged along the first direction x; the second sub-probe 112 and the second probe 12 are arranged in the gap between adjacent first sub-probes 111; wherein the first direction x is the arrangement direction of the gate line 30 of the battery 3 to be tested;

[0038] The first probe 11 is used to obtain the current signal of the gate line 30 during the test and input the current signal into the control unit 2; the second probe 12 is used to obtain the voltage signal of the gate line 30 during the test and input the voltage signal into the control unit 2;

[0039] The control unit 2 determines the current range of the battery 3 to be tested according to the current signal, and determines the voltage range of the battery 3 to be tested according to the voltage signal.

[0040] Wherein, the probe row 1 includes a plurality of probes, and the probes are contacted with the gate line 30 to collect the current signal and voltage signal of the corresponding gate line 30. Since the gate lines 30 on the main grid-free battery are arranged in parallel and at a fixed distance, probes arranged along the first direction x can be set on a single probe row 1, specifically including a first probe 11 and a second probe 12, the first probe 11 can be used to collect the current signal on the gate line 30, and the second probe 12 can be used to collect the voltage signal on the gate line 30, and since the gate line 30 is arranged along the first direction x, the first probe 11 and the second probe 12 are arranged along the first direction x. Wherein, in order to ensure the accuracy of the test, the current signal on each gate line 30 needs to be collected, so all the first probes 11 arranged along the first direction x can contact the gate line 30 correspondingly, so two staggered first sub-probes 111 and second sub-probes 112 are set, and the second sub-probe 112 is arranged in the gap between the first sub-probes 111 so that the dislocated second sub-probe 112 can contact the corresponding gate line 30.

[0041] It is understandable that the number and spacing of the gate lines 30 on the battery to be tested 3 are fixed, and the specifications of the probes on the probe row 1 are fixed, so in order to ensure that each gate line 30 is contacted, the first probes 11 need to be arranged in a staggered manner, and the staggered probes can meet the requirement of collecting current signals for each gate line 30. At the same time, the first sub-probes 111 and the second probes 12 can also be arranged in a staggered manner, so that the voltage signal can be collected while the current signal is collected, thereby ensuring the simultaneity of current and voltage collection and improving the test accuracy.

[0042] It can be understood that the degree of staggered arrangement of the second sub-probe 112 and the first sub-probe 111 can be determined according to the spacing between the gate lines 30 and the size of the probe. When the probe size is large and the spacing between the gate lines 30 is small, the degree of staggered arrangement of the second sub-probe 112 and the first sub-probe 111 is greater. The degree of staggered arrangement of the second sub-probe 112 and the first sub-probe 111 refers to the angle between the line between the first sub-probe 111 and the second sub-probe 112 and the first direction x. The larger the angle, the greater the degree of staggered arrangement, so as to ensure the accuracy of the test of the gate lines 30.

[0043] Among them, the first probe 11 and the second probe 12 are both connected to the control unit 2, and the control unit 2 can receive the current signal transmitted by the first probe 11 and the voltage signal transmitted by the second probe 12, and determine the current range of the battery 3 to be tested according to the current signal, and determine the voltage range of the battery 3 to be tested according to the voltage signal.

[0044] Specifically, during the test process, the probe row 1 can be moved to contact the corresponding gate line 30, and the first probe 11 and the second probe 12 can be contacted with the gate line 30 to collect the current signal and the voltage signal on the gate line 30. The current signal and the voltage signal are transmitted to the control unit 2, and the control unit 2 determines the current range of the battery 3 to be tested according to the current signal, and determines the voltage range of the battery 3 to be tested according to the voltage signal.

[0045] The technical solution of the embodiment of the present invention is to set the first probe and the second probe in the probe row of the testing device, and set the second sub-probe and the second probe in the first probe in the gap between adjacent first sub-probes, so that the probes on the probe row can fully contact the gate lines on the battery to be tested, thereby achieving the purpose of collecting current and voltage, and improving the accuracy and reliability of the test process.

[0046] Optional, continue to refer to Figure 1 and Figure 2 As shown, along the first direction x, first sub-probes 111 are included between adjacent second probes 12 .

[0047] The second probes 12 may be interspersed between the first sub-probes 111 for voltage detection, so that along the first direction x, the first sub-probes 111 are included between adjacent second probes 12, and the current and voltage are collected simultaneously, thereby improving the test accuracy.

[0048] In some embodiments, the number of first sub-probes 111 between any adjacent second probes 12 is the same. That is, the voltage signal is collected at every fixed gate line 30. For example, there are four first sub-probes 111 between any adjacent second probes 12, so that a voltage signal is collected once every five gate lines 30, ensuring the number of voltage signal collection and the accuracy of the test device.

[0049] It is understandable that the number and position of the corresponding second probes 12 may be set according to the required number of voltage signals to be collected, and this is not limited in the embodiment of the present invention.

[0050] According to the technical solution of the embodiment of the present invention, a first sub-probe is arranged between adjacent second probes, so that current signal collection and voltage signal collection are performed simultaneously, thereby improving test accuracy.

[0051] Optional, continue to refer to Figure 1 and Figure 2 As shown, along the first direction x, the size L1 of the first probe 11 and the second probe 12 is smaller than the interval L0 between adjacent gate lines 30;

[0052] Along the first direction x, the maximum distance L2 between adjacent first sub-probes 111 and second sub-probes 112 is greater than or equal to the interval L0 between adjacent gate lines 30 , and the maximum distance L3 between adjacent first sub-probes 111 and second sub-probes 12 is greater than or equal to the interval L0 between adjacent gate lines 30 .

[0053] Among them, in order to ensure that each probe can contact the corresponding gate line 30, the size L1 of the first probe 11 needs to be set smaller than the spacing L0 between adjacent gate lines 30. Only in this way can the first probe 11 not contact two gate lines 30 at the same time when it contacts the gate line 30, thereby ensuring the independence of the test; similarly, the size of the second probe 12 is smaller than the spacing L0 between adjacent gate lines 30, thereby ensuring that the second probe 12 does not contact two gate lines 30 at the same time when it contacts the gate line 30.

[0054] Among them, along the first direction x, the maximum distance L2 between adjacent first sub-probes 111 and second sub-probes 112 is greater than or equal to the spacing L0 between adjacent gate lines 30. Only in this way can the adjacent first sub-probes 111 and second sub-probes 112 cover adjacent gate lines 30. At the same time, since the size L1 of the first probe 11 is smaller than the spacing L0 between adjacent gate lines 30, the adjacent first sub-probes 111 and second sub-probes 112 can contact two adjacent gate lines 30 respectively, ensuring that each probe can contact the corresponding gate line 30; similarly, the maximum distance L3 between adjacent first sub-probes 111 and second probes 12 is greater than or equal to the spacing L0 between adjacent gate lines 30. Only in this way can the adjacent first sub-probes 111 and second probes 12 cover adjacent gate lines 30. At the same time, since the size L1 of the first probe 11 and second probe 12 is smaller than the spacing L0 between adjacent gate lines 30, the adjacent first sub-probes 111 and second probes 12 can contact two adjacent gate lines 30 respectively, ensuring that each probe can contact the corresponding gate line 30.

[0055] In some embodiments, the projections of the first probe 11 and the second probe 12 on the plane where the battery 3 to be tested is located are circular and both have a diameter of 2.5 mm, that is, L1 = 2.5 mm, to adapt to the battery 3 to be tested of corresponding size, and the regular shapes of the first probe 11 and the second probe 12 are also beneficial to the assembly setting of the probe row 1 to ensure the accuracy of the test effect.

[0056] The technical solution of the embodiment of the present invention is to set the size of the first probe and the second probe to be smaller than the spacing between adjacent gate lines; and the maximum distance between adjacent first sub-probes and second sub-probes is greater than or equal to the spacing between adjacent gate lines, and the maximum distance between adjacent first sub-probes and second probes is greater than or equal to the spacing between adjacent gate lines, so that the first sub-probe, the second sub-probe and the second probe can all contact the corresponding gate lines and any probe cannot contact two gate lines at the same time, thereby ensuring independence in the test process and improving the accuracy and reliability of the test device.

[0057] Optional, continue to refer to Figure 1 and Figure 2 As shown, along the first direction x, the distance between the centers of adjacent first sub-probes 111 and second sub-probes 112 is 2.6 mm; the distance between the centers of adjacent first sub-probes 111 and second sub-probes 12 is 2.6 mm.

[0058] Among them, in order to ensure independence during the test, the probes need to be independent of each other and not in contact with each other. Therefore, on the basis that the projections of the first probe 11 and the second probe 12 on the plane where the battery 3 to be tested is located are circular and have a diameter of 2.5 mm, the distance between the center of the adjacent first sub-probe 111 and the center of the second sub-probe 112 is set to 2.6 mm, so that there is a spacing of 0.1 mm between the first sub-probe 111 and the second sub-probe 112, and the distance between the center of the adjacent first sub-probe 111 and the center of the second probe 12 is 2.6 mm, so that there is a spacing of 0.1 mm between the first sub-probe 111 and the second sub-probe 12, thereby ensuring that the probes are independent of each other and do not affect the test of each gate line 30.

[0059] The technical solution of the embodiment of the present invention is to set the distance between the center of adjacent first sub-probes and the center of the second sub-probe to 2.6mm on the basis that the size of the first probe and the second probe is 2.5mm; the distance between the center of adjacent first sub-probes and the center of the second probe is 2.6mm, so that there is a certain distance between the first sub-probe and the second probe, and there is a certain distance between the first sub-probe and the second sub-probe, thereby ensuring independence during the test and the comprehensiveness of the test.

[0060] Optional, continue to refer to Figure 1 As shown, the probe row 1 further includes a probe sleeve 13;

[0061] The first probe 11 and the second probe 12 are sleeved on the probe shaft sleeve 13 .

[0062] The probes are detachable and replaceable on the probe sleeves 13, which play a role in positioning the probe positions. The first probe 11 and the second probe 12 can be respectively sleeved on the corresponding probe sleeves 13. When the first probe 11 or the second probe 12 is damaged, the probe at the corresponding position can be replaced to ensure the normal operation of the probe row 1.

[0063] In some embodiments, the projection of the probe sleeve 13 on the plane where the battery 3 to be tested is located is circular and has a diameter of 1.67 mm. The size and position of the probe sleeve 13 must be adapted to the corresponding probe to ensure the specifications of the probe row 1 after assembly, thereby ensuring the accuracy of the test device.

[0064] In some embodiments, the test device may include a plurality of identical probe rows 1, and the plurality of identical probe rows 1 are arranged along the second direction, wherein the second direction is the extension direction of the gate line 30. This allows the test device to simultaneously collect current signals and voltage signals at different positions on the battery 3 to be tested, further improving the test accuracy.

[0065] Based on the same inventive concept, Figure 3is a connection diagram of a first busbar-free battery testing method provided according to an embodiment of the present invention, combined with Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the present invention further provides a method for testing a busbar-free battery, which is applied in a testing device; the testing method comprises:

[0066] S10, obtaining a current signal and a voltage signal.

[0067] Among them, the current signal can be obtained through the first probe 11 on the probe row 1, and the voltage signal can be obtained through the second probe 12 on the probe row 1. The first probe 11 transmits the collected current signal to the control unit 2, and the second probe 12 transmits the collected voltage signal to the control unit 2.

[0068] S11. Determine the current range of the battery to be tested according to the current signal, and determine the voltage range of the battery to be tested according to the voltage signal.

[0069] The control unit 2 can calculate the current range and voltage range of the battery 3 to be tested in combination with the internally stored data.

[0070] Specifically, during the test process, the probe row 1 can be moved to contact the corresponding gate line 30, and the first probe 11 and the second probe 12 can be contacted with the gate line 30 to collect the current signal and the voltage signal on the gate line 30. The current signal and the voltage signal are transmitted to the control unit 2, and the control unit 2 determines the current range of the battery 3 to be tested according to the current signal, and determines the voltage range of the battery 3 to be tested according to the voltage signal.

[0071] The technical solution of the embodiment of the present invention utilizes the first probe and the second probe in the testing device so that the probes on the probe row can fully contact the gate lines on the battery to be tested. The signals of the first probe and the second probe are respectively collected and processed by the control unit, thereby achieving the purpose of electrical testing of the battery to be tested, thereby improving the accuracy and reliability of the testing process.

[0072] Based on the above embodiments, Figure 4 is a connection diagram of a second method for testing a busbar-free battery according to an embodiment of the present invention, combined with Figure 1 , Figure 2 and Figure 4 As shown, the test method includes:

[0073] S20, obtaining a current signal and a voltage signal.

[0074] S21. Determine the current range of the battery to be tested according to the current signal, and determine the voltage range of the battery to be tested according to the voltage signal.

[0075] S22. Determine whether the current of the battery to be tested is qualified according to the current range and the preset current threshold, and determine whether the voltage of the battery to be tested is qualified according to the voltage range and the preset voltage threshold.

[0076] The preset current threshold value may be a standard current range of the specifications of the battery 3 to be tested that is pre-stored by the control unit 2. When the current range of the battery 3 to be tested does not conform to the standard current range, it indicates that the electrical parameters of the battery 3 to be tested are unqualified. When they conform, it indicates that the current parameters of the battery 3 to be tested are qualified. When the voltage range of the battery 3 to be tested does not conform to the standard voltage range, it indicates that the electrical parameters of the battery 3 to be tested are unqualified. When they conform, it indicates that the voltage parameters of the battery 3 to be tested are qualified.

[0077] In some embodiments, other electrical parameters may be determined in combination with the current range and the voltage range, which is not limited in this embodiment of the present invention.

[0078] S23. Output a qualified signal after the current and voltage of the battery to be tested are qualified.

[0079] Among them, when any electrical parameter of the battery 3 to be tested is unqualified, it will affect the normal operation of the battery 3 to be tested, and then the battery 3 to be tested is determined to be an unqualified battery. When all electrical parameters are qualified, it is determined that the battery 3 to be tested can work normally and output a qualified signal so that the staff receives the test result of the battery 3 to be tested and ends the test.

[0080] The technical solution of the embodiment of the present invention ensures the accuracy of the battery detection and improves the management and control quality of the battery to be tested by continuing to determine whether the electrical properties are qualified according to the current range and the voltage range respectively, and outputting a qualified signal after both the current range and the voltage range are qualified.

[0081] Based on the above embodiments, Figure 5 is a connection diagram of a third busbar-free battery testing method provided according to an embodiment of the present invention, combined with Figure 1 , Figure 2 and Figure 5 As shown, the test method includes:

[0082] S30: Acquire current signal and voltage signal.

[0083] S31. Determine the current range of the battery to be tested according to the current signal, and determine the voltage range of the battery to be tested according to the voltage signal.

[0084] S32. Determine whether the current of the battery to be tested is qualified according to the current range and the preset current threshold, and determine whether the voltage of the battery to be tested is qualified according to the voltage range and the preset voltage threshold.

[0085] S33, outputting a qualified signal after the current and voltage of the battery to be tested are qualified.

[0086] S34: outputting an alarm signal when the current and / or voltage of the battery to be tested is unqualified.

[0087] Among them, when any electrical parameter of the battery 3 to be tested is unqualified, it will affect the normal operation of the battery 3 to be tested, and then the battery 3 to be tested is judged to be an unqualified battery. At this time, an alarm signal is output, so that the staff receives the test result of the battery 3 to be tested, and controls the battery 3 to be tested to prevent the battery 3 to be tested from going offline and affecting the production quality.

[0088] The technical solution of the embodiment of the present invention is to set the first probe and the second probe in the probe row of the testing device, and set the second sub-probe and the second probe in the first probe in the gap between adjacent first sub-probes, so that the probes on the probe row can fully contact the gate lines on the battery to be tested, thereby achieving the purpose of collecting current and voltage, and improving the accuracy and reliability of the test process.

[0089] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0090] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A test device for a busbar-less battery, characterized in that: include: Probe row and control unit; The probe row is communicatively connected with the control unit; The probe row includes a first probe and a second probe; the first probe includes a first sub-probe arranged along a first direction and a second sub-probe arranged along the first direction; the second sub-probe and the second probe are arranged in a gap between adjacent first sub-probes; wherein the first direction is the grid line arrangement direction of the battery to be tested; The first probe is used to obtain the current signal of the gate line during the test and input the current signal into the control unit; the second probe is used to obtain the voltage signal of the gate line during the test and input the voltage signal into the control unit; The control unit determines the current range of the battery to be tested according to the current signal, and determines the voltage range of the battery to be tested according to the voltage signal.

2. The test device according to claim 1, characterized in that Along the first direction, the first sub-probes are located between adjacent second probes.

3. The testing device according to claim 2, characterized in that The number of the first sub-probes between any adjacent second probes is the same.

4. The testing device according to claim 1, characterized in that Along the first direction, the sizes of the first probe and the second probe are smaller than the spacing between adjacent gate lines; Along the first direction, the maximum distance between adjacent first sub-probes and second sub-probes is greater than or equal to the spacing between adjacent gate lines, and the maximum distance between adjacent first sub-probes and second probes is greater than or equal to the spacing between adjacent gate lines.

5. The testing device according to claim 4, characterized in that The projections of the first probe and the second probe on the plane where the battery to be tested is located are circular and both have a diameter of 2.5 mm.

6. The test device according to claim 5, characterized in that Along the first direction, the distance between the centers of adjacent first sub-probes and the centers of adjacent second sub-probes is 2.6 mm; the distance between the centers of adjacent first sub-probes and the centers of adjacent second sub-probes is 2.6 mm.

7. The testing device according to claim 1, characterized in that The probe row also includes a probe sleeve; The first probe and the second probe are sleeved on the probe shaft sleeve.

8. A method for testing a busbar-free battery, characterized in that: Used in the testing device according to any one of claims 1 to 7; The test method includes: Acquire current signal and voltage signal; The current range of the battery to be tested is determined according to the current signal, and the voltage range of the battery to be tested is determined according to the voltage signal.

9. The test method according to claim 8, characterized in that After determining the current range of the battery to be tested according to the current signal and determining the voltage range of the battery to be tested according to the voltage signal, the method further includes: Determine whether the current of the battery to be tested is qualified according to the current range and the preset current threshold, and determine whether the voltage of the battery to be tested is qualified according to the voltage range and the preset voltage threshold; After the current and voltage of the battery to be tested are both qualified, a qualified signal is output.

10. The test method according to claim 9, characterized in that After judging whether the current of the battery to be tested is qualified according to the current range and the preset current threshold, and judging whether the voltage of the battery to be tested is qualified according to the voltage range and the preset voltage threshold, the method further includes: After the current and / or voltage of the battery to be tested is unqualified, an alarm signal is output.

Images