Battery module assembly test structure
By designing a battery module assembly test structure containing cylinder and pressure head components, the problem of the inability to meet the product testing needs of different stages in the prior art is solved, and the rapid testing and failure simulation of battery cell units are realized, and assembly is simplified. process and reduce costs.
Patent Information
- Application Number
- CN202421189783.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-05-28
AI Technical Summary
The existing battery test structure cannot meet the testing needs of products at different stages at the same time, and cannot select bad battery cells in time. It is cumbersome to assemble and cannot be disassembled after assembly, which leads to waste.
A battery module assembly test structure is designed, including a first end plate, a second end plate, an adjustable support rod, a cylinder and a head assembly, and the temperature and voltage of the electric core unit are collected through the cylinder and head assembly, and directly Connect to the BMS to form a simple battery pack for testing.
It realizes rapid testing and fault simulation of battery cell units, simplifies the assembly process, reduces costs, and can timely select bad battery cells, solving the problem of inability to disassemble after assembly.
Smart Images
Figure CN222530498U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of batteries, and in particular relates to a battery module assembly test structure. Background Art
[0002] During the battery research and development process, we often need to test products at different stages.
[0003] For laser welding products, if they are not shipped after proofing and testing, they can only be scrapped; if there is a welding error or the battery cell is found to be abnormal during testing (large voltage difference, abnormal temperature, etc.), the entire group can only be scrapped.
[0004] For screw-locking products, it is necessary to manually install the fixing bracket, connecting piece, collection line, battery cell locking screws and fix them in the chassis; if the battery cell is replaced, the installation steps must be repeated, which is relatively cumbersome.
[0005] For a newly developed BMS, it is necessary to test the protection functions of BMS with different string numbers (such as overall overvoltage, single cell overvoltage, overall undervoltage, single cell overvoltage, overcurrent, high temperature, low temperature, differential pressure protection, etc.). BMS testing equipment can only test a fixed number of strings. For newly developed products with different string numbers, new equipment needs to be purchased, which is costly.
[0006] If active or passive balancing tests are performed and the single variable principle is followed, the same set of battery packs with large voltage differences need to be used for testing, and defective cells can be replaced to simulate large voltage differences. Laser welded battery packs are not removable, so the single variable principle cannot be followed during testing, which can lead to inaccurate testing or accidental errors that lead to incorrect conclusions. In addition, the cells cannot be reused after the laser welded product is tested, making it difficult to simulate and reproduce a defective battery pack on the client side. The installation steps for testing screw-locking products are relatively cumbersome. Utility Model Content
[0007] The embodiment of the utility model provides a battery module assembly test structure, which aims to solve the problems that the existing test structure cannot simultaneously meet the testing of products at different stages (such as new product development testing, BMS function testing with different numbers of strings, simulated battery failure assembly testing, etc.), cannot timely select bad battery cells, the assembly is cumbersome, and the waste caused by the inability to disassemble after assembly is solved.
[0008] To achieve the above-mentioned purpose, the embodiment of the utility model provides a battery module assembly test structure, which is applicable to the battery module, and includes a first end plate, a second end plate, at least two first adjustable support rods, at least two second adjustable support rods, a first cylinder and a second cylinder;
[0009] Two first adjustable support rods are symmetrically arranged at one end of the first end plate; one end of the first adjustable support rod is connected to the first end plate, and the other end is connected to the second end plate;
[0010] Two second adjustable support rods are symmetrically arranged at the other end of the first end plate; one end of the second adjustable support rod is connected to the first end plate, and the other end is connected to the second end plate;
[0011] The first cylinder is disposed between the two first adjustable support rods; the second cylinder is disposed between the two second adjustable support rods;
[0012] The battery module is arranged on the first end plate, and a pressure head assembly adapted to the battery module is arranged on a side of the second end plate close to the battery module.
[0013] As a preferred embodiment, when the battery module assembly test structure is in a working state, the pressing head assembly abuts against the battery module.
[0014] As a preferred embodiment, the pressing head assembly includes a first pressing head assembly, a second pressing head assembly and several third pressing head assemblies, the first pressing head assembly abuts against the first end of the battery module, the second pressing head assembly abuts against the second end of the battery module; the third pressing head assembly abuts against two adjacent battery cell units in the battery module respectively.
[0015] As a preferred embodiment, the first pressing head assembly includes a first pressing head movably connected to the second end plate, a first connecting piece arranged on the side of the first pressing head close to the battery module, and a first expansion spring terminal arranged on a side of the first pressing head; the first connecting piece is movably connected to the second end plate through a first spring knob structure.
[0016] As a preferred embodiment, one end of the first spring knob structure is connected to the first connecting piece, and the other end passes through the first pressure head and is movably connected to the second end plate.
[0017] As a preferred embodiment, the second pressure head assembly includes a second pressure head movably connected to the second end plate, a second connecting piece arranged on the side of the second pressure head close to the battery module, and a second expansion spring terminal arranged on a side of the second pressure head; the second connecting piece is movably connected to the second end plate through a second spring knob structure.
[0018] As a preferred embodiment, one end of the second spring knob structure is connected to the second connecting piece, and the other end passes through the second pressure head and is movably connected to the second end plate.
[0019] As a preferred embodiment, the third pressure head assembly includes a third pressure head movably connected to the second end plate, a third connecting piece arranged on the side of the third pressure head close to the battery module, and a third expansion spring terminal arranged on a side of the third pressure head; the third connecting piece is movably connected to the second end plate through at least two third spring knob structures.
[0020] As a preferred embodiment, the two third spring knob structures are symmetrically arranged at both ends of the third connecting piece; one end of the third spring knob structure is connected to the third connecting piece, and the other end passes through the third pressure head and is movably connected to the second end plate.
[0021] As a preferred embodiment, the first connecting piece is a positive electrode connecting piece, the second connecting piece is a negative electrode connecting piece, and the third connecting piece is a bipolar connecting piece.
[0022] As a preferred embodiment, one end of the bipolar connecting piece is a positive electrode connecting portion, and the other end is a negative electrode connecting portion; the positive electrode connecting portion is connected to the positive electrode column of one of the adjacent battery cells, and the negative electrode connecting portion is connected to the negative electrode column of the other battery cell.
[0023] As a preferred embodiment, one end of the first cylinder is connected to the first end plate, and the other end is connected to the second end plate; one end of the second cylinder is connected to the first end plate, and the other end is connected to the second end plate.
[0024] As a preferred embodiment, a fixing plate is provided on the first end plate, and a plurality of mutually parallel locking positions are provided on the fixing plate; the locking positions are arranged in one-to-one correspondence with the battery cell units of the battery module, and the battery cell units are locked in the locking positions.
[0025] As a preferred embodiment, a baffle is provided between two adjacent clamping positions, and the clamping positions are adapted to the battery core units.
[0026] Compared with the prior art, this application has the following technical effects and advantages:
[0027] The present application can collect the temperature and voltage of the battery cell unit by setting up a cylinder and a pressure head assembly, and can be directly connected to the BMS through the expansion spring terminal of the pressure head assembly. After the expansion spring terminal is directly connected to the BMS, a simple battery pack is formed, which can be used for charge and discharge tests, and can also simulate various battery pack conditions for testing. The structure of the present application is simple to install, the control circuit is simple, and the cost is low. It is convenient to simulate more battery pack bad conditions for testing. It can be used for new product development testing, BMS function testing with different numbers of strings, simulated battery failure assembly testing, etc. It can timely select battery cells with large polarity, and solve the problems of cumbersome module assembly and waste caused by inability to disassemble after assembly. The structure of the present application applies pressure through a spring knob structure to make each connecting piece abut against the pole. The structure is an insulating structure to prevent leakage. And the structure does not require welding, which is particularly suitable for testing of excessively small currents. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0029] Figure 1 This is a structural schematic diagram of a battery module assembly test structure according to an embodiment of the present utility model;
[0030] Figure 2 yes Figure 1 Schematic diagram of the exploded structure of the battery module assembly test structure;
[0031] Figure 3 yes Figure 2 A schematic structural diagram of a first pressure head assembly;
[0032] Figure 4 yes Figure 2 A schematic structural diagram of a second pressure head assembly;
[0033] Figure 5 yes Figure 2 Schematic diagram of the structure of the third pressure head assembly. DETAILED DESCRIPTION
[0034] The technical solutions in the embodiments of the present utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.
[0035] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0036] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.
[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0039] Specifically, Figure 1 to Figure 2 As shown, the embodiment of the utility model provides a battery module assembly test structure, which is applicable to a battery module 100, including a first end plate 10, a second end plate 20, at least two first adjustable support rods 30, at least two second adjustable support rods 40, a first cylinder 50 and a second cylinder 60;
[0040] Two first adjustable support rods 30 are symmetrically arranged at one end of the first end plate 10; one end of the first adjustable support rod 30 is connected to the first end plate 10, and the other end is connected to the second end plate 20;
[0041] Two second adjustable support rods 40 are symmetrically arranged at the other end of the first end plate 10; one end of the second adjustable support rod 40 is connected to the first end plate 10, and the other end is connected to the second end plate 20;
[0042] The first cylinder 50 is disposed between the two first adjustable support rods 30; the second cylinder 60 is disposed between the two second adjustable support rods 40;
[0043] The battery module 100 is disposed on the first end plate 10 , and a pressure head assembly 70 adapted to the battery module 100 is disposed on a side of the second end plate 20 close to the battery module 100 .
[0044] As a preferred embodiment, when the battery module assembly test structure is in a working state, the pressing head assembly 70 abuts against the battery module 100 .
[0045] As a preferred embodiment, the pressing head assembly 70 includes a first pressing head assembly 71, a second pressing head assembly 72 and a plurality of third pressing head assemblies 73, wherein the first pressing head assembly 71 abuts against the first end of the battery module 100, and the second pressing head assembly 72 abuts against the second end of the battery module 100; the third pressing head assembly 73 abuts against two adjacent battery cell units in the battery module 100 respectively.
[0046] In the embodiment of the present application, the first end of the battery module 100 is the positive terminal, and the second end is the negative terminal; two adjacent battery cell units are connected in series through the third pressure head assembly 73.
[0047] As a preferred embodiment, Figure 3 As shown, the first pressing head assembly 71 includes a first pressing head 711 movably connected to the second end plate 20, a first connecting piece 712 arranged on the side of the first pressing head 711 close to the battery module 100, and a first expansion spring terminal 713 arranged on one side of the first pressing head 711; the first connecting piece 712 is movably connected to the second end plate 20 via a first spring knob structure 714.
[0048] As a preferred embodiment, one end of the first spring knob structure 714 is connected to the first connecting piece 712 , and the other end passes through the first pressing head 711 and is movably connected to the second end plate 20 .
[0049] In the embodiment of the present application, the first pressure head 711 can also be movably connected to the second end plate 20 through a rotating spring structure 715. There are generally four rotating spring structures 715, which are evenly arranged on the four end corners of the first pressure head 711, so that it is convenient to adjust the distance between the first pressure head 711 and the battery module 100.
[0050] As a preferred embodiment, Figure 4 As shown, the second pressing head assembly 72 includes a second pressing head 721 movably connected to the second end plate 20, a second connecting piece 722 arranged on the side of the second pressing head 721 close to the battery module 100, and a second expansion spring terminal 723 arranged on one side of the second pressing head 721; the second connecting piece 722 is movably connected to the second end plate 20 via a second spring knob structure 724.
[0051] As a preferred embodiment, one end of the second spring knob structure 724 is connected to the second connecting piece 722 , and the other end passes through the second pressing head 721 and is movably connected to the second end plate 20 .
[0052] In the embodiment of the present application, the second pressure head 721 can also be movably connected to the second end plate 20 through a rotating spring structure 725. There are generally four rotating spring structures 725, which are evenly arranged on the four end corners of the second pressure head 721, so that it is convenient to adjust the distance between the second pressure head 721 and the battery module 100.
[0053] As a preferred embodiment, Figure 5 As shown, the third pressing head assembly 73 includes a third pressing head 731 movably connected to the second end plate 20, a third connecting piece 732 arranged on the side of the third pressing head 731 close to the battery module 100, and a third expansion spring terminal 733 arranged on one side of the third pressing head 731; the third connecting piece 732 is movably connected to the second end plate 20 through at least two third spring knob structures 734.
[0054] As a preferred embodiment, the two third spring knob structures 734 are symmetrically arranged at both ends of the third connecting piece 732; one end of the third spring knob structure 734 is connected to the third connecting piece 732, and the other end passes through the third pressure head 731 and is movably connected to the second end plate 20.
[0055] In the embodiment of the present application, the third pressure head 731 can also be movably connected to the second end plate 20 through a rotating spring structure 735. There are generally four rotating spring structures 735, which are evenly arranged on the four end corners of the third pressure head 731, so that it is convenient to adjust the distance between the third pressure head 731 and the battery module 100.
[0056] In the embodiment of the present application, a plurality of strip holes for fixing the first pressing head assembly, the second pressing head assembly and the third pressing head assembly are provided on the second end plate, and the first pressing head assembly, the second pressing head assembly and the third pressing head assembly are provided on the second end plate through the strip holes. Moreover, for different distances between the battery cell poles, the distance between the pressing heads can be adjusted according to the length of the strip holes to match the battery cell units with different pole distances.
[0057] As a preferred embodiment, the first connecting piece 712 is a positive connecting piece, the second connecting piece 722 is a negative connecting piece, and the third connecting piece 732 is a bipolar connecting piece.
[0058] As a preferred embodiment, one end of the bipolar connecting piece is a positive electrode connecting portion (not marked in the figure), and the other end is a negative electrode connecting portion (not marked in the figure); the positive electrode connecting portion is connected to the positive electrode column of one of the adjacent battery cells, and the negative electrode connecting portion is connected to the negative electrode column of the other battery cell. The bipolar connecting piece is used to realize the series connection of two adjacent battery cells.
[0059] As a preferred embodiment, one end of the first cylinder 50 is connected to the first end plate 10 , and the other end is connected to the second end plate 20 ; one end of the second cylinder 60 is connected to the first end plate 10 , and the other end is connected to the second end plate 20 .
[0060] As a preferred embodiment, a fixing plate 11 is provided on the first end plate 10 , and a plurality of mutually parallel locking positions 111 are provided on the fixing plate 11 ; the locking positions 111 are arranged one-to-one correspondingly to the battery cell units of the battery module 100 , and the battery cell units are locked in the locking positions 111 .
[0061] As a preferred embodiment, a baffle 112 is provided between two adjacent clamping positions 111 , and the clamping positions 111 are adapted to the battery core units.
[0062] When using the structure of the present application, first apply conductive paste (to prevent the connection from getting hot during overcurrent) to the surface of the pole of the battery cell unit, arrange the first connecting piece, the second connecting piece and the third connecting piece neatly according to the required connection method, and after being uniformly compressed by the first cylinder and the second cylinder, adjust the contact pressure between each pressure head assembly and the pole; (the pressure head can also be tightened manually without an air source); then connect other components; connect the expansion spring terminal to the BMS, and monitor it through the computer connected to the host computer software.
[0063] The present application can collect the temperature and voltage of the battery cell unit by setting up a cylinder and a pressure head assembly, and can be directly connected to the BMS through the expansion spring terminal of the pressure head assembly. After the expansion spring terminal is directly connected to the BMS, a simple battery pack is formed, which can be used for charge and discharge tests, and can also simulate various battery pack conditions for testing. The structure of the present application is simple to install, the control circuit is simple, and the cost is low. It is easy to simulate more battery pack bad conditions for testing. It can be used for new product development testing, BMS function testing with different numbers of strings, simulated battery failure assembly testing, etc. It can timely select battery cells with large polarity and solve the problems of cumbersome module assembly and waste caused by inability to disassemble after assembly. The structure of the present application uses a spring knob structure to make each connecting piece abut against the pole. The structure is an insulating structure to prevent leakage and does not require welding. It is particularly suitable for testing of excessively small currents.
[0064] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.
[0065] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.
[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A battery module assembly test structure, characterized in that: Applicable to a battery module, comprising a first end plate, a second end plate, at least two first adjustable support rods, at least two second adjustable support rods, a first cylinder and a second cylinder; Two first adjustable support rods are symmetrically arranged at one end of the first end plate; one end of the first adjustable support rod is connected to the first end plate, and the other end is connected to the second end plate; Two second adjustable support rods are symmetrically arranged at the other end of the first end plate; one end of the second adjustable support rod is connected to the first end plate, and the other end is connected to the second end plate; The first cylinder is disposed between the two first adjustable support rods; the second cylinder is disposed between the two second adjustable support rods; The battery module is arranged on the first end plate, and a pressure head assembly adapted to the battery module is arranged on a side of the second end plate close to the battery module.
2. The battery module assembly test structure according to claim 1, characterized in that: When the battery module assembly test structure is in a working state, the pressing head assembly abuts against the battery module.
3. The battery module assembly test structure according to claim 2, characterized in that: The pressing head assembly includes a first pressing head assembly, a second pressing head assembly and a plurality of third pressing head assemblies. The first pressing head assembly abuts against the first end of the battery module, the second pressing head assembly abuts against the second end of the battery module; and the third pressing head assembly abuts against two adjacent battery cell units in the battery module respectively.
4. The battery module assembly test structure according to claim 3, characterized in that: The first pressing head assembly comprises a first pressing head movably connected to the second end plate, a first connecting piece arranged on a side of the first pressing head close to the battery module, and a first expansion spring terminal arranged on a side of the first pressing head; The first connecting piece is movably connected to the second end plate via a first spring knob structure; The second pressing head assembly includes a second pressing head movably connected to the second end plate, a second connecting piece arranged on the side of the second pressing head close to the battery module, and a second expansion spring terminal arranged on a side of the second pressing head; the second connecting piece is movably connected to the second end plate through a second spring knob structure.
5. The battery module assembly test structure according to claim 4, characterized in that: One end of the first spring knob structure is connected to the first connecting piece, and the other end passes through the first pressing head and is movably connected to the second end plate; One end of the second spring knob structure is connected to the second connecting piece, and the other end passes through the second pressing head and is movably connected to the second end plate.
6. The battery module assembly test structure according to claim 5, characterized in that: The third pressing head assembly includes a third pressing head movably connected to the second end plate, a third connecting piece arranged on the side of the third pressing head close to the battery module, and a third expansion spring terminal arranged on a side of the third pressing head; the third connecting piece is movably connected to the second end plate through at least two third spring knob structures.
7. The battery module assembly test structure according to claim 6, characterized in that: The two third spring knob structures are symmetrically arranged at both ends of the third connecting piece; one end of the third spring knob structure is connected to the third connecting piece, and the other end passes through the third pressure head and is movably connected to the second end plate.
8. The battery module assembly test structure according to claim 7, characterized in that: The first connecting piece is a positive connecting piece, the second connecting piece is a negative connecting piece, and the third connecting piece is a bipolar connecting piece; One end of the bipolar connecting piece is a positive electrode connecting portion, and the other end is a negative electrode connecting portion; the positive electrode connecting portion is connected to the positive electrode column of one of the adjacent battery cells, and the negative electrode connecting portion is connected to the negative electrode column of the other battery cell.
9. The battery module assembly test structure according to claim 1, characterized in that: One end of the first cylinder is connected to the first end plate, and the other end is connected to the second end plate; one end of the second cylinder is connected to the first end plate, and the other end is connected to the second end plate.
10. The battery module assembly test structure according to claim 1, characterized in that: The first end plate is provided with a fixing plate, and the fixing plate is provided with a plurality of mutually parallel clamping positions; the clamping positions are arranged in one-to-one correspondence with the battery cell units of the battery module, and the battery cell units are clamped in the clamping positions; A baffle is arranged between two adjacent clamping positions, and the clamping positions are adapted to the battery core units.