Battery bottom liquid cooling test device

Abstract

The utility model relates to battery liquid cooling test tool technical field, especially, relate to a kind of battery bottom liquid cooling test device, including liquid cooling plate, fixed clamping plate, movable clamping plate and bolt assembly, wherein, the fixed clamping plate with the movable clamping plate is oppositely arranged, and detachably connected by the bolt assembly, constitute the battery large area clamp for clamping to be measured monomer battery cell;Temperature acquisition window is equipped on the movable clamping plate, for accommodating temperature sensor or leading out temperature measuring line;The bottom of the fixed clamping plate is fixedly connected with the top of the liquid cooling plate, forms integrated structure, so that the to-be-measured monomer battery cell is clamped in the battery large area clamp while, its bottom surface and the top surface of the liquid cooling plate are in contact;The utility model proposes a kind of battery bottom liquid cooling test device, which is integrated by battery large area clamp and liquid cooling plate, realizes the stable clamping of to-be-measured monomer battery cell, and good contact with liquid cooling plate, improves temperature measurement accuracy.

Description

Technical Field

[0001] This utility model relates to the field of battery liquid cooling testing fixture technology, and in particular to a battery bottom liquid cooling testing device. Background Technology

[0002] With the rapid development of new energy vehicles and large-scale energy storage systems, the performance requirements for power batteries and energy storage batteries are increasing, especially in terms of high-rate charge and discharge capabilities, cycle life, and thermal safety. As the basic unit for energy storage and release, the thermal management effect of a single battery cell (such as a square aluminum-cased battery cell structure, authorized announcement number CN222365609U) directly determines its operational stability, life decay behavior, and overall system safety.

[0003] Current research and verification of bottom liquid cooling technology mainly focus on the module or battery pack level. However, at the cell level, there is a lack of dedicated and standardized bottom liquid cooling testing equipment, which severely restricts the independent evaluation and mechanism research of the thermal management efficiency of bottom liquid cooling itself.

[0004] In actual R&D, technicians often have to use non-dedicated methods to temporarily set up test environments for bottom liquid cooling tests of individual battery cells. For example, a large liquid cooling fixture is placed upside down on the bottom of the individual battery cell, or a general-purpose fixture is used in conjunction with an external liquid cooling plate to "simulate bottom cooling". However, such temporary solutions have obvious drawbacks: the individual battery cell is not securely clamped, which can easily lead to poor contact at the cooling interface and affect the accuracy of temperature measurement. Utility Model Content

[0005] In view of this, this utility model proposes a bottom liquid-cooled testing device for batteries. By integrating the large-area battery clamp with the liquid-cooling plate, it achieves stable clamping of the individual battery cell under test and good contact with the liquid-cooling plate, thus improving temperature measurement accuracy. This solves the problems of large temperature measurement deviations and low data reliability caused by unstable clamping and poor contact at the cooling interface in existing testing devices.

[0006] The technical solution of this utility model is implemented as follows: This utility model provides a liquid-cooled testing device for the bottom of a battery, including a liquid-cooled plate, a fixed clamping plate, a movable clamping plate, and a bolt assembly. The fixed clamping plate and the movable clamping plate are arranged opposite to each other and are detachably connected by the bolt assembly to form a large-area battery clamp for holding the single battery cell to be tested; The movable clamp is equipped with a temperature acquisition window for accommodating a temperature sensor or leading out a temperature measuring wire; The bottom of the fixed clamping plate is fixedly connected to the top of the liquid cooling plate to form an integrated structure, so that while the single cell under test is clamped in the battery large surface clamp, its bottom surface abuts against the top surface of the liquid cooling plate.

[0007] Based on the above technical solutions, preferably, the liquid cooling plate is arranged horizontally, and the fixing clamp is arranged vertically, wherein... The fixing clamp is fixed to one side edge of the top of the liquid cooling plate.

[0008] Based on the above technical solutions, preferably, the movable clamp is arranged vertically, and its bottom surface abuts against the top surface of the liquid cooling plate.

[0009] Based on the above technical solutions, preferably, the bolt assembly has two sets, symmetrically arranged on both sides of the single battery cell under test, wherein, Each bolt assembly includes two horizontally arranged threaded sleeves; Each threaded sleeve is screwed to both ends with a fastening bolt, one of which is horizontally inserted through the fixed clamping plate, and the other of which is horizontally inserted through the movable clamping plate.

[0010] Based on the above technical solutions, preferably, the movable clamping plate is provided with a first through hole for the fastening bolt to pass through.

[0011] Based on the above technical solutions, preferably, the first through hole is a countersunk hole.

[0012] Based on the above technical solution, preferably, the fixing clamp is provided with a second through hole for the fastening bolt to pass through, wherein... The second through hole is a rectangular stepped hole with its long side extending vertically.

[0013] Based on the above technical solutions, preferably, the length of the threaded sleeve is less than the thickness of the single battery cell to be tested.

[0014] Based on the above technical solutions, preferably, thermally conductive silicone is provided between the liquid cooling plate and the single cell under test.

[0015] Based on the above technical solutions, preferably, the liquid cooling plate is provided with an S-shaped cooling channel.

[0016] The battery bottom liquid-cooled testing device of this utility model has the following advantages over the prior art: (1) By fixing the fixed clamping plate to the liquid cooling plate to form an integrated structure, and together with the movable clamping plate and bolt assembly, it constitutes the bottom liquid cooling test device of the battery, realizing a high degree of integration of clamping function and bottom cooling function. When the cell under test is clamped, its bottom surface can be tightly attached to the top surface of the liquid cooling plate, avoiding the problem of poor contact of the cooling interface caused by unstable clamping in the traditional temporary construction method, and significantly improving the reliability of heat conduction and the accuracy of temperature acquisition.

[0017] (2) The adjustable large-face clamp structure, which is composed of fixed clamping plate, movable clamping plate and bolt assembly, can be adapted to single battery cells of different thicknesses and has good size compatibility and versatility.

[0018] (3) The temperature acquisition window on the movable clamp facilitates the installation of temperature sensors or the lead-out of temperature measurement lines, which avoids obstructing the large-area temperature measurement of the battery cell and facilitates the acquisition and wiring of temperature signals, effectively improving the availability of test data and the ease of operation.

[0019] (4) By setting the second through hole as a rectangular stepped hole with its long side extending vertically, the bolt assembly is given vertical adjustment freedom. By sliding the bolt up and down, it can accommodate single cells of different heights, expanding the applicability of the device. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of a battery bottom liquid cooling testing device according to the present invention; Figure 2 This is a perspective view of a battery bottom liquid cooling testing device according to the present invention. Figure 3 This is an exploded view of a battery bottom liquid cooling testing device according to the present invention; Figure 4 This is a schematic diagram of the S-shaped cooling channel. Figure 5 This is a schematic diagram showing the usage status of a battery bottom liquid cooling testing device according to the present invention; In the diagram: 1. Liquid cooling plate; 2. Battery large-area clamp; 9. Single cell to be tested; 21. Fixed clamp; 22. Movable clamp; 23. Bolt assembly; 101. S-shaped cooling channel; 231. Threaded sleeve; 232. Fastening bolt; 2101. Second through hole; 2201. Temperature acquisition window; 2202. First through hole. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0024] In the description of the embodiments of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0027] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0028] like Figure 1-5 As shown, the present invention provides a battery bottom liquid cooling test device, which includes a liquid cooling plate 1 and a battery large surface clamp 2. The battery large surface clamp 2 includes a fixed clamp 21, a movable clamp 22 and a bolt assembly 23.

[0029] The fixed clamping plate 21 and the movable clamping plate 22 are arranged opposite to each other and are detachably connected by bolt assembly 23, forming a battery clamping fixture 2 for holding the single battery cell 9 under test. The movable clamping plate 22 is provided with a temperature acquisition window 2201 to accommodate a temperature sensor or lead out a temperature measurement wire. This avoids obstructing the temperature measurement of the large surface of the battery cell and facilitates the acquisition and wiring of temperature signals, effectively improving the availability of test data and ease of operation. The "large surface of the battery cell" refers to the two largest side surfaces in a square battery cell structure, typically used for structural support and thermal management interfaces.

[0030] The bottom of the fixed clamping plate 21 is fixedly connected to the top of the liquid cooling plate 1 to form an integrated structure, so that while the single cell 9 to be tested is clamped in the battery large surface clamping fixture 2, its bottom surface abuts against the top surface of the liquid cooling plate 1, so as to achieve simultaneous clamping and cooling.

[0031] In this structure, the battery clamp 2 is integrated with the liquid cooling plate 1 to achieve stable clamping of the battery cell 9 under test and good contact with the liquid cooling plate 1, thereby improving the accuracy of temperature measurement. At the same time, the clamp consists of a fixed clamping plate 21, a movable clamping plate 22 and a bolt assembly 23, which can be adjusted to adapt to battery cells of different thicknesses, thus providing good compatibility.

[0032] Based on the above structure, the liquid cooling plate 1 is horizontally positioned to provide a stable and flat cooling surface for the battery cell. The fixing plate 21 is vertically positioned and fixed to one side edge of the top of the liquid cooling plate 1, together forming an L-shaped structure to enhance the overall rigidity and mechanical stability of the device.

[0033] The movable clamping plate 22 is set vertically, and its bottom surface abuts against the top surface of the liquid cooling plate 1 to prevent the movable clamping plate 22 from sinking or shifting during the clamping process, thereby improving the clamping effect of the battery cell.

[0034] Based on the above structure, the bolt assembly 23 is provided in two sets, symmetrically arranged on both sides of the single cell 9 to be tested, to ensure that the clamping force is evenly distributed on both sides of the cell, to avoid unilateral force causing shell deformation or internal electrode stress concentration, and to improve the safety and data reliability of the testing process.

[0035] Each bolt assembly 23 includes two horizontally arranged threaded sleeves 231, spaced vertically to form a double-layered load-bearing structure. Each threaded sleeve 231 has a fastening bolt 232 screwed to both ends. One fastening bolt 232 horizontally penetrates the fixed clamping plate 21, while the other fastening bolt 232 horizontally penetrates the movable clamping plate 22. This dual-point locking structure enhances clamping rigidity and stability. Furthermore, by adjusting the preload of the fastening bolts 232, the clamping degree can be precisely controlled, adapting to individual battery cells of different thicknesses and exhibiting good compatibility.

[0036] The length of the threaded sleeve 231 is less than the thickness of the battery cell 9 under test, ensuring that the threaded sleeve 231 will not physically interfere with the battery cell housing during clamping, thus avoiding the risk of improper clamping, battery cell deformation, or fixture damage due to structural interference. In practical applications, threaded sleeves 231 of various lengths can be prefabricated and flexibly replaced according to the thickness of the battery cell under test, further improving the versatility and applicability of the device.

[0037] Based on the above structure, the movable clamping plate 22 is provided with a first through hole 2202 for the fastening bolt 232 to pass through. This hole serves as an assembly guide structure to ensure that the fastening bolt 232 can be accurately inserted and connected to the threaded sleeve 231, avoiding assembly difficulties or stress concentration caused by misalignment.

[0038] Furthermore, the first through hole 2202 is a countersunk hole, which can accommodate the head of the fastening bolt 232 and allow it to be recessed into the movable clamp 22, achieving flush installation. This avoids the risk of scratches or spatial interference caused by the bolt head protruding, improving both safety and aesthetics.

[0039] Based on the above structure, the fixing plate 21 is provided with a second through hole 2101 for the fastening bolt 232 to pass through. The second through hole 2101 is a rectangular stepped hole with its long side extending vertically. This design gives the fastening bolt 232 a degree of freedom of adjustment in the vertical direction. By sliding up and down, it can adapt to single cells of different height specifications, making it compatible with more specifications of cells.

[0040] Based on the above structure, thermally conductive silicone is provided between the liquid cooling plate 1 and the single-cell battery under test 9 to reduce interfacial contact thermal resistance and improve heat conduction efficiency. The flexibility of the thermally conductive silicone can also adaptively deform under clamping force, enhancing the tightness of the fit and the uniformity of thermal contact, thereby improving the temperature response speed and temperature measurement accuracy, and providing more realistic data support for thermal performance evaluation.

[0041] Based on the above structure, the liquid cooling plate 1 is provided with an S-shaped cooling channel 101 to extend the flow path of the cooling medium, increase the heat exchange area, and enhance cooling uniformity and efficiency. The S-shaped structure ensures good heat dissipation performance while maintaining moderate pressure loss and stable flow, which can effectively avoid local overheating or uneven temperature gradient at the bottom of the cell. This helps to obtain accurate and repeatable thermal management performance data and improves the engineering reference value of the test results.

[0042] The method of using the battery bottom liquid-cooled testing device of this utility model is as follows: First, the battery cell 9 to be tested is placed on top of the liquid cooling plate 1, with one side of it against the fixed clamping plate 21. Thermally conductive silicone is pre-applied between the bottom surface of the battery cell and the liquid cooling plate 1 to fill the interface gap, reduce contact thermal resistance, and improve heat conduction efficiency. Then, the position of the movable clamping plate 22 is adjusted so that it faces the other large surface of the battery cell. By rotating the fastening bolt 232, the threaded sleeve 231 is driven to tighten axially, so that the fixed clamping plate 21 and the movable clamping plate 22 jointly clamp the battery cell 9 to be tested, achieving a stable and uniform clamping state. During the clamping process, the battery cell 9 to be tested is pressed downwards to ensure that its bottom surface is tightly adhered to the top surface of the liquid cooling plate 1 under pressure, until the simultaneous establishment of mechanical fixation and thermal connection is completed.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A liquid-cooled testing device for the bottom of a battery, characterized in that: It includes a liquid cooling plate (1), a fixed clamping plate (21), a movable clamping plate (22), and a bolt assembly (23), wherein, The fixed clamping plate (21) is arranged opposite to the movable clamping plate (22) and is detachably connected by the bolt assembly (23) to form a battery clamp (2) for holding the single cell (9) to be tested. The movable clamp (22) is provided with a temperature acquisition window (2201) for accommodating a temperature sensor or leading out a temperature measuring wire; The bottom of the fixed clamp (21) is fixedly connected to the top of the liquid cooling plate (1) to form an integrated structure, so that the bottom surface of the single cell (9) to be tested is in contact with the top surface of the liquid cooling plate (1) while it is being clamped in the battery large surface clamp (2).

2. The battery bottom liquid cooling testing device as described in claim 1, characterized in that: The liquid cooling plate (1) is horizontally arranged, and the fixing clamp (21) is vertically arranged, wherein, The fixing clamp (21) is fixed to one side edge of the top of the liquid cooling plate (1).

3. The battery bottom liquid cooling testing device as described in claim 1, characterized in that: The movable clamp (22) is vertically arranged, and its bottom surface abuts against the top surface of the liquid cooling plate (1).

4. The battery bottom liquid cooling testing device as described in claim 1, characterized in that: The bolt assembly (23) has two sets, symmetrically arranged on both sides of the single cell (9) under test, wherein, Each bolt assembly (23) includes two horizontally arranged threaded sleeves (231). Each threaded sleeve (231) is screwed with a fastening bolt (232) at both ends, with one end of the fastening bolt (232) passing horizontally through the fixed clamping plate (21) and the other end of the fastening bolt (232) passing horizontally through the movable clamping plate (22).

5. The battery bottom liquid cooling testing device as described in claim 4, characterized in that: The movable clamp (22) is provided with a first through hole (2202) for the fastening bolt (232) to pass through.

6. The battery bottom liquid cooling testing device as described in claim 5, characterized in that: The first through hole (2202) is a countersunk hole.

7. The battery bottom liquid cooling testing device as described in claim 4, characterized in that: The fixing plate (21) is provided with a second through hole (2101) for the fastening bolt (232) to pass through, wherein, The second through hole (2101) is a rectangular stepped hole with its long side extending vertically.

8. The battery bottom liquid cooling testing device as described in claim 4, characterized in that: The length of the threaded sleeve (231) is less than the thickness of the single cell (9) to be tested.

9. The battery bottom liquid cooling testing device as described in claim 1, characterized in that: Thermally conductive silicone is provided between the liquid cooling plate (1) and the single cell (9) to be tested.

10. The battery bottom liquid cooling testing device as described in claim 1, characterized in that: The liquid cooling plate (1) is provided with an S-shaped cooling channel (101).

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