Device and method for detecting electrical performance of battery pack

Abstract

The present invention discloses an electrical performance detection device and method for a battery cell group, which relates to the technical field of battery cell electrical performance testing. The detection device includes a base plate and a test assembly. The test assembly is provided with multiple positive conductive probes and multiple negative conductive probes. The multiple positive conductive probes and the multiple negative conductive probes are connected according to preset rules and are provided with two first sampling lines, multiple second sampling lines, and two third sampling lines. When the multiple positive conductive probes and the multiple negative conductive probes are connected to the electrodes of the battery cell group, the two first sampling lines, the multiple second sampling lines, and the two third sampling lines are respectively connected to a tester to detect the electrical performance of the battery cell group. The detection device of the embodiment of the present invention is connected to the electrodes of the battery cell group through the conductive probes, and the voltage and current values ​​of the battery cell group are measured through the sampling lines. It can directly determine the positive and negative pole arrangement direction and insulation performance of the battery cell group, without the need for positive and negative pole error prevention tooling and visual inspection, thereby improving detection efficiency and accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of battery cell electrical performance testing, and in particular to a device and method for testing the electrical performance of a battery cell group. Background Art

[0002] Currently in the battery industry, in the traditional CTP assembly process, after the battery cells are measured and screened, they are first arranged according to the specified positive and negative pole directions and quantity. After using a lifting fixture to squeeze the grouped battery cells in the X and Y directions to the required size, they are lifted into a box coated with thermal conductive structural adhesive. After the battery cell group is lifted into the box, it is difficult to remove the battery cell due to the adhesion of the thermal conductive structural adhesive and the squeezing force of the box, and it is not repairable. Therefore, before the battery cell group is placed in the box, the electrical properties of the battery cell, such as the positive and negative poles, battery cell voltage, battery cell pressure difference, battery cell group insulation, and battery cell group internal resistance, need to be tested to confirm that the battery cell group meets the requirements before placing it in the box.

[0003] Prior art methods used a combination of a positive and negative misalignment tool with markings and visual inspection to verify the positive and negative polarity orientation of a battery pack. However, using a positive and negative misalignment tool is prone to inspection errors and makes it difficult to verify the voltage and insulation performance of a battery pack. Summary of the Invention

[0004] The embodiments of the present invention provide an electrical performance detection device and method for a battery cell group to solve the technical problems in the related art that the existing positive and negative pole error-proofing tooling is prone to inspection errors and it is difficult to detect the voltage value and insulation performance of the battery cell group.

[0005] In a first aspect, a device for detecting the electrical performance of a battery pack is provided, comprising:

[0006] A bottom plate, the bottom plate being arranged above the battery cell group;

[0007] a test assembly, the test assembly being disposed on the bottom plate, the test assembly being provided with a plurality of positive conductive probes and a plurality of negative conductive probes, the plurality of positive conductive probes being connected to the plurality of negative conductive probes according to a preset rule and being provided with two first sampling lines, a plurality of second sampling lines, and two third sampling lines;

[0008] When the plurality of positive conductive probes and the plurality of negative conductive probes are connected to the electrodes of the battery cell group, the two first sampling lines, the plurality of second sampling lines and the two third sampling lines are respectively connected to a tester to detect the electrical performance of the battery cell group.

[0009] In some embodiments, the test component includes:

[0010] Multiple positive electrode test components and multiple negative electrode test components, each of the positive electrode test components is provided with multiple positive electrode conductive probes and corresponds to the positive electrode of a battery cell in the battery cell group, each of the negative electrode test components is provided with multiple negative electrode conductive probes and corresponds to the negative electrode of a battery cell in the battery cell group, and each battery cell in the battery cell group is arranged in sequence in at least one row along the horizontal direction, and the positive and negative electrodes of two adjacent battery cells are arranged alternately.

[0011] In some embodiments, one of the negative conductive probes in the first negative test component is provided with a first sampling line, one of the positive conductive probes in the first positive test component is connected to one of the negative conductive probes in the second negative test component, and one of the positive conductive probes in the second positive test component is connected to one of the negative conductive probes in the third negative test component, and the cycle continues until one of the positive conductive probes in the last positive test component is provided with a first sampling line.

[0012] In some embodiments, the second sampling line is provided at the connection between one of the positive conductive probes in the positive test component and one of the negative conductive probes in the negative test component.

[0013] In some embodiments, one negative conductive probe in each of the negative test components at odd positions is connected to each other and is provided with a third sampling line, and one negative conductive probe in each of the negative test components at even positions is connected to each other and is provided with a third sampling line.

[0014] In some embodiments, at least one quick clamp is provided above the bottom plate, and the quick clamp is connected to the plurality of positive conductive probes and the plurality of negative conductive probes to control the rise and fall of the plurality of positive conductive probes and the plurality of negative conductive probes.

[0015] In a second aspect, a method for detecting the electrical performance of a battery pack is provided, using the aforementioned device for detecting the electrical performance of a battery pack, comprising the following steps:

[0016] Fixing the bottom plate above the battery cell group, connecting the multiple positive conductive probes and the multiple negative conductive probes of the test assembly on the bottom plate to the electrodes of the battery cell group;

[0017] Connecting a plurality of positive electrode conductive probes and a plurality of negative electrode conductive probes according to a preset rule and providing two first sampling lines, a plurality of second sampling lines and two third sampling lines;

[0018] The tester is respectively connected to the two first sampling lines, the plurality of second sampling lines and the two third sampling lines, and the electrical performance of the battery cell group is detected using the tester.

[0019] In some embodiments, the step of connecting a tester to the two first sampling lines, the plurality of second sampling lines, and the two third sampling lines, and using the tester to detect the electrical performance of the battery cell group includes:

[0020] When the tester is connected to the two first sampling lines;

[0021] Use a tester to obtain the current value and voltage value between the two first sampling lines, judge the insulation performance of the battery cell group according to the current value between the two first sampling lines, and judge the withstand voltage performance of the battery cell group according to the voltage value between the two first sampling lines.

[0022] In some embodiments, the step of connecting the tester to the two first sampling lines, the plurality of second sampling lines, and the two third sampling lines, and using the tester to detect the electrical performance of the battery cell group further includes:

[0023] When the tester is connected to a plurality of second sampling lines;

[0024] Use a tester to obtain the voltage value between any two adjacent second sampling lines;

[0025] If the voltage value between any two adjacent second sampling lines is a positive number, it is determined that the positive and negative poles of the corresponding battery cell in the battery cell group are arranged correctly; if the voltage value between any two adjacent second sampling lines is a negative number, it is determined that the positive and negative poles of the corresponding battery cell in the battery cell group are arranged incorrectly.

[0026] In some embodiments, the step of connecting the tester to the two first sampling lines, the plurality of second sampling lines, and the two third sampling lines, and using the tester to detect the electrical performance of the battery cell group further includes:

[0027] When the tester is connected to two third sampling lines;

[0028] A tester is used to obtain a current value between two third sampling lines, and the insulation performance between two adjacent battery cells in the battery cell group is determined according to the current value between the two third sampling lines.

[0029] The beneficial effects brought about by the technical solution provided by the present invention include:

[0030] An embodiment of the present invention provides an electrical performance testing device and method for a battery cell group. The testing device includes a base plate and a test assembly. The base plate is configured to be positioned above the battery cell group. The test assembly is positioned on the base plate. The test assembly is provided with a plurality of positive conductive probes and a plurality of negative conductive probes. The plurality of positive conductive probes and the plurality of negative conductive probes are connected according to a preset rule and are provided with two first sampling lines, a plurality of second sampling lines, and two third sampling lines. When the plurality of positive conductive probes and the plurality of negative conductive probes are connected to the electrodes of the battery cell group, the two first sampling lines, the plurality of second sampling lines, and the two third sampling lines are respectively connected to a tester to test the electrical performance of the battery cell group. The electrical performance testing device for a battery cell group according to the embodiment of the present invention connects the plurality of positive conductive probes and the plurality of negative conductive probes to the electrodes of the battery cell group and measures the voltage and current values ​​of the battery cell group through the sampling lines. The positive and negative electrode arrangement direction and insulation performance of the battery cell group can be directly determined based on the voltage and current values, eliminating the need for positive and negative electrode error-proofing tooling and visual inspection, thereby improving detection efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 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.

[0032] Figure 1 A schematic structural diagram of an electrical performance testing device for a battery pack provided by an embodiment of the present invention;

[0033] Figure 2 A schematic structural diagram of a base plate provided in an embodiment of the present invention;

[0034] Figure 3 Schematic diagram of the structure of the positive electrode test component and the negative electrode test component provided in the embodiment of the present invention

[0035] Figure 4 A schematic diagram of the structure of a battery pack provided in an embodiment of the present invention;

[0036] Figure 5 A schematic diagram of connecting multiple positive electrode conductive probes and multiple negative electrode conductive probes provided by an embodiment of the present invention;

[0037] Reference numerals:

[0038] 1. Bottom plate; 11. Quick clamp;

[0039] 2. Test assembly; 21. Positive electrode test component; 211. Positive electrode conductive probe; 22. Negative electrode test component; 221. Negative electrode conductive probe;

[0040] 3. Battery cell group; 31. Battery cell;

[0041] 4. First sampling line;

[0042] 5. Second sampling line;

[0043] 6. The third sampling line. DETAILED DESCRIPTION

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 making creative efforts shall fall within the scope of protection of the present invention.

[0045] The embodiments of the present invention provide an electrical performance detection device and method for a battery cell group, which can solve the technical problems that inspection errors are prone to occur when using existing positive and negative pole error prevention tooling, and it is difficult to detect the voltage value and insulation performance of the battery cell group.

[0046] Figure 1 An electrical performance testing device for a battery cell group provided in an embodiment of the present invention includes: a base plate 1 and a test assembly 2, wherein the base plate 1 is used to be arranged above the battery cell group 3, and the test assembly 2 is arranged on the base plate 1. The test assembly 2 is provided with multiple positive conductive probes 211 and multiple negative conductive probes 221. The multiple positive conductive probes 211 and the multiple negative conductive probes 221 are connected according to preset rules and are provided with two first sampling lines 4, multiple second sampling lines 5 and two third sampling lines 6. When the multiple positive conductive probes 211 and the multiple negative conductive probes 221 are connected to the electrodes of the battery cell group 3, the two first sampling lines 4, the multiple second sampling lines 5 and the two third sampling lines 6 are respectively connected to the tester to detect the electrical performance of the battery cell group 3.

[0047] The electrical performance detection device of the battery cell group of the present invention is provided with a base plate and a test assembly, wherein the base plate is used to be arranged above the battery cell group, the test assembly is arranged on the base plate, and the test assembly is provided with a plurality of positive conductive probes and a plurality of negative conductive probes. The plurality of positive conductive probes and the plurality of negative conductive probes are connected according to a preset rule and are provided with two first sampling lines, a plurality of second sampling lines and two third sampling lines. When the plurality of positive conductive probes and the plurality of negative conductive probes are connected to the electrodes of the battery cell group, the two first sampling lines, the plurality of second sampling lines and the two third sampling lines are respectively connected to the tester to detect the battery cell. The electrical performance of the battery group includes the insulation performance, voltage resistance performance, positive and negative pole direction arrangement of two adjacent battery cells and insulation performance between two adjacent battery cells. By connecting multiple positive conductive probes and multiple negative conductive probes to the electrodes of the battery group, the tester is connected to two first sampling lines, multiple second sampling lines and two third sampling lines respectively and measures the voltage value and current value of the battery group. The positive and negative pole arrangement direction, insulation performance and voltage resistance performance of the battery group can be directly judged according to the measured voltage value and current value, without the use of positive and negative pole anti-error tooling and visual inspection, thereby improving the detection efficiency and detection accuracy.

[0048] As an optional embodiment, in one embodiment of the invention, see Figure 2 and Figure 3 As shown, the test assembly 2 includes: a plurality of positive test components 21 and a plurality of negative test components 22, each of the positive test components 21 is provided with a plurality of positive conductive probes 211 and corresponds to the positive pole of a battery cell 31 in the battery cell group 3, and each of the negative test components 22 is provided with a plurality of negative conductive probes 221 and corresponds to the negative pole of a battery cell 31 in the battery cell group 3, and each battery cell 31 in the battery cell group 3 is arranged in sequence in at least one row along the horizontal direction, and the positive poles and negative poles of two adjacent battery cells 31 are alternately arranged. One of the positive electrode testing components 21 is provided with four positive electrode conductive probes 211 for detecting the positive electrode of a battery cell 31 in the battery cell group 3. One of the negative electrode testing components 22 is also provided with four negative electrode conductive probes 221 for detecting the negative electrode of a battery cell 31 in the battery cell group 3. The positions of the positive electrode testing component 21 and the negative electrode testing component 22 are arranged in a one-to-one correspondence with the electrodes of each battery cell 31 in the battery cell group 3. After the bottom plate 1 is placed on the battery cell group 3, the electrical performance of the battery cell group 3 can be directly tested.

[0049] As an optional embodiment, in one embodiment of the invention, see Figure 4 and Figure 5As shown, one of the negative conductive probes 221 in the first negative test component 22 is provided with a first sampling line 4, one of the positive conductive probes 211 in the first positive test component 21 is connected to one of the negative conductive probes 221 in the second negative test component 22, and one of the positive conductive probes 211 in the second positive test component 21 is connected to one of the negative conductive probes 221 in the third negative test component 22, and the cycle continues until one of the positive conductive probes 211 in the last positive test component 21 is provided with a first sampling line 4, one of the positive conductive probes 211 in the first positive test component 21 is connected to one of the negative conductive probes 221 in the second negative test component 22, and one of the positive conductive probes 211 in the second positive test component 21 is connected to One of the negative conductive probes 221 in the third negative test component 22 is connected, and the cycle is repeated until one of the negative conductive probes 221 in the last negative test component 22 is connected to one of the positive conductive probes 211 in the penultimate positive test component 21. Through this connection relationship, all the battery cells 31 in the battery cell group 3 are connected in series, and one of the negative conductive probes 221 in the first negative test component 22 is provided with a first sampling line 4 as the negative electrode of the entire battery cell group 3, and one of the positive conductive probes 211 in the last positive test component 21 is provided with a first sampling line 4 as the positive electrode of the entire battery cell group 3. By connecting the tester to the two first sampling lines 4 at the same time, the total voltage value, insulation performance and withstand voltage performance of the battery cell group 3 can be directly measured. The detection is convenient and fast, and the test results are accurate.

[0050] As an optional embodiment, in one embodiment of the invention, see Figure 5 As shown, a second sampling line 5 is provided at the connection between one of the positive conductive probes 211 in the positive test component 21 and one of the negative conductive probes 221 in the negative test component 22. Based on the series connection of all the battery cells 31 in the battery cell group 3, a second sampling line 5 is provided at the connection between each of the positive test component 21 and the negative test component 22. The second sampling line 5 can directly detect the voltage of a single battery cell 31, and can also calculate the voltage difference between any two adjacent battery cells 31, as well as the voltage difference between the maximum voltage and the minimum voltage in the battery cell group 3.

[0051] As an optional embodiment, in one embodiment of the invention, see Figure 5As shown, one of the negative conductive probes 221 in the negative electrode test components 22 on all odd-numbered positions is connected to each other and is provided with a third sampling line 6, and one of the negative conductive probes 221 in the negative electrode test components 22 on all even-numbered positions is connected to each other and is provided with a third sampling line 6. Since the negative electrode of each battery cell 31 is conductively connected to its outer shell, and the outer shell of each battery cell 31 is wrapped with a blue film for insulation treatment, it prevents short circuits caused by conduction between adjacent battery cells 31 after the battery cells 31 are grouped. By connecting the negative electrodes of all odd-numbered battery cells 31 in series and then connecting the negative electrodes of all even-numbered battery cells 31 in series, the tester can be connected to two third sampling lines 6 to directly measure the insulation between all adjacent battery cells 31 and judge the integrity of the blue film on the outer shells of all adjacent battery cells 31. There is no need to repeat the measurement multiple times, thereby improving the detection efficiency.

[0052] As an optional embodiment, in one embodiment of the invention, see Figure 1 As shown, at least one quick clamp 11 is provided above the base plate 1. The quick clamp 11 is connected to the multiple positive conductive probes 211 and the multiple negative conductive probes 221, and is used to control the rise and fall of the multiple positive conductive probes 211 and the multiple negative conductive probes 221. When using the electrical performance testing device of the battery cell group of the present invention, the quick clamp 11 is pressed down, and the quick clamp 11 controls the multiple positive conductive probes 211 and the multiple negative conductive probes 221 to descend until they are connected to the electrodes of the battery cell group 3. When the measurement is completed, the quick clamp 11 is released to control the multiple positive conductive probes 211 and the multiple negative conductive probes 221 to ascend.

[0053] An embodiment of the present invention further provides a method for detecting the electrical performance of a battery pack, using the aforementioned device for detecting the electrical performance of a battery pack, comprising the following steps:

[0054] Fix the base plate 1 above the battery cell group 3 so that the multiple positive conductive probes 211 and the multiple negative conductive probes 221 of the test assembly 2 on the base plate 1 are connected to the electrodes of the battery cell group 3;

[0055] Connecting multiple positive electrode conductive probes 211 and multiple negative electrode conductive probes 221 according to a preset rule and providing two first sampling lines 4, multiple second sampling lines 5 and two third sampling lines 6;

[0056] A tester is connected to the two first sampling lines 4 , the plurality of second sampling lines 5 and the two third sampling lines 6 respectively, and the tester is used to detect the electrical performance of the battery cell group 3 .

[0057] The voltage and current values ​​of the battery cell group can be directly measured through two first sampling lines, multiple second sampling lines, and two third sampling lines. The positive and negative pole arrangement directions, insulation performance, and voltage resistance performance of the battery cell group can be directly determined based on the measured voltage and current values. There is no need to use positive and negative pole error-proofing tooling and visual inspection, thereby improving detection efficiency and accuracy.

[0058] As an optional embodiment, in one embodiment of the invention, see Figure 5 As shown, the steps of connecting the tester to the two first sampling lines 4, the plurality of second sampling lines 5 and the two third sampling lines 6, and using the tester to detect the electrical performance of the battery cell group 3 include:

[0059] When the tester is connected to the two first sampling lines 4, the tester is used to obtain the current value and voltage value between the two first sampling lines 4, and the insulation performance of the battery group 3 is judged according to the current value between the two first sampling lines 4, and the withstand voltage performance of the battery group 3 is judged according to the voltage value between the two first sampling lines 4.

[0060] Specifically, all the battery cells 31 in the battery cell group 3 are connected in series, and the two first sampling lines 4 are respectively the positive and negative poles of the battery cell group 3. By connecting the tester to the two first sampling lines 4, the current value and voltage value of the entire battery cell group 3 can be directly measured. The current value is the leakage current of the battery cell group 3. The greater the leakage current, the worse the insulation performance of the battery cell group 3. The voltage value is the total voltage value of the battery cell group 3. The greater the total voltage value, the better the voltage resistance performance of the battery cell group 3.

[0061] As an optional embodiment, in one embodiment of the invention, see Figure 5 As shown, the step of connecting the tester to the two first sampling lines 4, the plurality of second sampling lines 5 and the two third sampling lines 6, and using the tester to detect the electrical performance of the battery cell group 3, further includes:

[0062] When the tester is connected to multiple second sampling lines 5, the tester is used to obtain the voltage value between any two adjacent second sampling lines 5. If the voltage value between any two adjacent second sampling lines 5 is a positive number, it is judged that the positive and negative pole directions of the corresponding battery cell 31 in the battery cell group 3 are arranged correctly. If the voltage value between any two adjacent second sampling lines 5 is a negative number, it is judged that the positive and negative pole directions of the corresponding battery cell 31 in the battery cell group 3 are arranged incorrectly.

[0063] Specifically, L0 is the negative pole of the first battery cell 31, and L1 is the positive pole of the first battery cell 31. When the tester is connected to two adjacent second sampling lines 5, namely L0 and L1, at the same time, the voltage value measured between L0 and L1 is the voltage value of the first battery cell 31. If the voltage value is positive, the positive and negative poles of the first battery cell 31 are arranged correctly. If the voltage value is negative, the positive and negative poles of the first battery cell 31 are arranged incorrectly. When the tester is connected to two adjacent second sampling lines 5, namely L1 and L2, at the same time, the voltage value measured between L1 and L2 is the voltage value of the second battery cell 31. If the voltage value is positive, the positive and negative poles of the second battery cell 31 are arranged incorrectly. The positive and negative poles are arranged correctly. If the voltage value is a negative number, the positive and negative poles of the second battery cell 31 are arranged incorrectly. The process cycles until the tester is connected to two adjacent second sampling lines 5, namely L13 and L14, at the same time, where L14 is the positive pole of the fourteenth battery cell 31. The voltage value measured between L13 and L14 is the voltage value of the fourteenth battery cell 31. If the voltage value is a positive number, the positive and negative poles of the fourteenth battery cell 31 are arranged correctly. If the voltage value is a negative number, the positive and negative poles of the fourteenth battery cell 31 are arranged incorrectly. In this way, the positive and negative poles of all the battery cells 31 in the battery cell group 3 can be quickly and accurately detected.

[0064] As an optional embodiment, in one embodiment of the invention, see Figure 5 As shown, the step of connecting the tester to the two first sampling lines 4, the plurality of second sampling lines 5 and the two third sampling lines 6, and using the tester to detect the electrical performance of the battery cell group 3, further includes:

[0065] When the tester is connected to the two third sampling lines 6 , the tester is used to obtain the current value between the two third sampling lines 6 , and the insulation performance between two adjacent battery cells 31 in the battery cell group 3 is determined based on the current value between the two third sampling lines 6 .

[0066] Specifically, the negative electrodes of the battery cells 31 on all odd positions are connected in series through two third sampling lines 6, and the negative electrodes of the battery cells 31 on all even positions are connected in series. The tester is connected to the two third sampling lines 6 to directly measure the current value between any two adjacent battery cells 31. The current value is the leakage current between the two adjacent battery cells 31. The greater the leakage current, the worse the insulation performance between the two adjacent battery cells 31. The integrity of the blue film of the outer shell of the two adjacent battery cells 31 can be judged.

[0067] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0068] It should be noted that, in the present invention, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0069] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is to be construed in the widest possible manner consistent with the principles and novel features of the present invention.

Claims

1. An electrical performance testing device for a battery pack, characterized in that: include: A bottom plate (1), the bottom plate (1) being arranged above the battery cell group (3); A test assembly (2), the test assembly (2) being arranged on the base plate (1), the test assembly (2) being provided with a plurality of positive conductive probes (211) and a plurality of negative conductive probes (221), the plurality of positive conductive probes (211) and the plurality of negative conductive probes (221) being connected according to a preset rule and being provided with two first sampling lines (4), a plurality of second sampling lines (5) and two third sampling lines (6); The test assembly (2) includes a plurality of positive test components (21) and a plurality of negative test components (22), one of the negative conductive probes (221) in the first negative test component (22) is provided with a first sampling line (4), one of the positive conductive probes (211) in the first positive test component (21) is connected to one of the negative conductive probes (221) in the second negative test component (22), and one of the positive conductive probes (211) in the second positive test component (21) is connected to one of the negative conductive probes (221) in the third negative test component (22), and the cycle continues until one of the positive conductive probes (211) in the last positive test component (21) is provided with a first sampling line (4); A second sampling line (5) is provided at the connection between one of the positive conductive probes (211) in the positive test component (21) and one of the negative conductive probes (221) in the negative test component (22); One of the negative conductive probes (221) in the negative electrode test components (22) at all odd-numbered positions is connected to one another and is provided with a third sampling line (6); and one of the negative conductive probes (221) in the negative electrode test components (22) at all even-numbered positions is connected to one another and is provided with a third sampling line (6); When the plurality of positive electrode conductive probes (211) and the plurality of negative electrode conductive probes (221) are connected to the electrodes of the battery cell group (3), the two first sampling lines (4), the plurality of second sampling lines (5) and the two third sampling lines (6) are respectively connected to a tester to detect the electrical performance of the battery cell group (3).

2. The electrical performance testing device of a battery pack according to claim 1, characterized in that: Each of the positive electrode test components (21) is provided with a plurality of positive electrode conductive probes (211) corresponding to the positive electrode of a battery cell (31) in the battery cell group (3); each of the negative electrode test components (22) is provided with a plurality of negative electrode conductive probes (221) corresponding to the negative electrode of a battery cell (31) in the battery cell group (3); and each battery cell (31) in the battery cell group (3) is arranged in sequence in at least one row along the horizontal direction, and the positive and negative electrodes of two adjacent battery cells (31) are arranged alternately.

3. The electrical performance testing device of a battery pack according to claim 1, characterized in that: At least one quick clamp (11) is provided above the bottom plate (1), and the quick clamp (11) is connected to the plurality of positive conductive probes (211) and the plurality of negative conductive probes (221) and is used to control the rise and fall of the plurality of positive conductive probes (211) and the plurality of negative conductive probes (221).

4. A method for detecting the electrical performance of a battery pack, using the device for detecting the electrical performance of a battery pack according to claim 1, characterized in that: The following steps are involved: The base plate (1) is fixed above the battery cell group (3), so that the plurality of positive electrode conductive probes (211) and the plurality of negative electrode conductive probes (221) of the test assembly (2) on the base plate (1) are connected to the electrodes of the battery cell group (3); Connecting a plurality of positive electrode conductive probes (211) and a plurality of negative electrode conductive probes (221) according to a preset rule and providing two first sampling lines (4), a plurality of second sampling lines (5) and two third sampling lines (6); The tester is respectively connected to the two first sampling lines (4), the plurality of second sampling lines (5) and the two third sampling lines (6), and the electrical performance of the battery cell group (3) is detected using the tester.

5. The method for detecting the electrical performance of a battery pack according to claim 4, wherein: The steps of connecting the tester to the two first sampling lines (4), the plurality of second sampling lines (5) and the two third sampling lines (6), and using the tester to detect the electrical performance of the battery cell group (3) include: When the tester is connected to the two first sampling lines (4); The current value and voltage value between the two first sampling lines (4) are obtained using a tester, the insulation performance of the battery cell group (3) is judged based on the current value between the two first sampling lines (4), and the withstand voltage performance of the battery cell group (3) is judged based on the voltage value between the two first sampling lines (4).

6. The method for detecting the electrical performance of a battery pack according to claim 4, wherein: The step of connecting the tester to the two first sampling lines (4), the plurality of second sampling lines (5) and the two third sampling lines (6), and using the tester to detect the electrical performance of the battery cell group (3) also includes: When the tester is connected to the plurality of second sampling lines (5); Using a tester to obtain the voltage value between any two adjacent second sampling lines (5); If the voltage value between any two adjacent second sampling lines (5) is a positive number, it is determined that the positive and negative poles of the corresponding battery cell (31) in the battery cell group (3) are arranged correctly; if the voltage value between any two adjacent second sampling lines (5) is a negative number, it is determined that the positive and negative poles of the corresponding battery cell (31) in the battery cell group (3) are arranged incorrectly.

7. The method for detecting the electrical performance of a battery pack according to claim 4, wherein: The step of connecting the tester to the two first sampling lines (4), the plurality of second sampling lines (5) and the two third sampling lines (6), and using the tester to detect the electrical performance of the battery cell group (3) also includes: When the tester is connected to the two third sampling lines (6); A tester is used to obtain a current value between two third sampling lines (6), and the insulation performance between two adjacent battery cells (31) in the battery cell group (3) is determined based on the current value between the two third sampling lines (6).

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