Battery monomer fixing device

Abstract

The utility model provides a battery monomer fixing device, and relates to the technical field of battery testing, the battery monomer fixing device comprises a fixing seat, a driving pump and two clamping plates arranged oppositely, the two clamping plates are arranged on the fixing seat in a sliding manner, and the clamping plates are internally provided with first cavities for accommodating cooling liquid; the driving pump communicates with the first cavity channels of the two clamping plates and is used for pumping cooling liquid into the first cavity channels. According to the invention, the battery monomers can be cooled through the internal cooling liquid while the battery monomers are fixed, so that the temperature rise of the battery caused by frequent charging and discharging of the battery monomers is reduced or even avoided, and the possibility of thermal runaway and even explosion of the battery in the test process is reduced; and life and property safety in the test process is ensured.

Description

A battery cell fixing device Technical Field

[0001] This application belongs to the field of battery testing technology, and in particular relates to a battery cell fixing device. Background Technology

[0002] A battery module contains multiple individual battery cells and is the basic energy storage unit that constitutes an electrochemical energy storage power station. The importance of battery modules in modern society is reflected in many aspects, including power supply, renewable energy storage, disaster emergency backup power, power supply for medical equipment, and power source for transportation. With the widespread use of batteries, the testing of their electrochemical performance has become increasingly important.

[0003] Currently, battery electrochemical performance testing typically involves connecting battery cells to testing equipment. However, due to the varying sizes of battery cells and the movement of the connecting wires, battery cells are prone to displacement during connection or shifting under external forces. This can lead to data fluctuations, inaccurate results, and even short circuits. Furthermore, frequent charging and discharging during testing can cause temperature rises in battery cells, potentially leading to thermal runaway and explosions. Therefore, it is necessary to secure and cool battery cells during testing to prevent displacement, temperature increases, and ultimately, battery and property safety. Based on these considerations, a device was designed that can both secure and cool battery cells. Summary of the Invention

[0004] The purpose of this application is to provide a device that can both fix the battery cells and cool them down.

[0005] To achieve the above objectives, this application is implemented as follows:

[0006] This application provides a battery cell fixing device, including:

[0007] Fixed base;

[0008] Two opposing clamps are slidably mounted on the fixed base, forming a receiving area for fixing a single battery cell between the two clamps, and the clamps have a first cavity for receiving coolant inside;

[0009] A drive pump is connected to the first cavity of each of the two clamping plates, and the drive pump is used to pump the coolant into the first cavity.

[0010] Optionally, the clamping plate has a hollow structure, and the hollow cavity inside the clamping plate is configured as the first cavity.

[0011] Optionally, the clamp has a serpentine channel configured as the first cavity.

[0012] Optionally, the clamp has an inlet and an outlet communicating with the first cavity, and the inlet is connected to the drive pump.

[0013] Optionally, the clamp includes a first part and a second part, the first part having a groove on the side facing the receiving space, and the second part covering the groove and cooperating with the groove to form the first cavity;

[0014] The thickness of the second part is 1mm-5mm.

[0015] Optionally, the clamp includes a first part and a second part, the first part having a groove on the side facing the receiving space, and the second part covering the groove and cooperating with the groove to form the first cavity;

[0016] The second part is a flexible component made of a waterproof flexible material.

[0017] Optionally, the fixing base includes a locking member and a guide member, the two clamping plates are slidably disposed on the guide member, the locking member is detachably connected to the guide member, and the locking member is used to lock the two clamping plates clamped on both sides of the battery cell.

[0018] Optionally, the guide includes a screw, and the locking element includes a nut;

[0019] The two clamping plates are slidably mounted on the screw, and the screw is threaded with nuts on the outer sides of the two clamping plates respectively. The nuts are used to compress the adjacent clamping plates.

[0020] Optionally, the guide includes two guide rails, and the two clamping plates are slidably disposed on the two guide rails, with the two guide rails located on both sides of the two clamping plates;

[0021] The distance between the two guide rails is equal to the width of the battery cell.

[0022] Optionally, the guide includes two guide rails, and the two clamping plates are slidably disposed on the two guide rails, with the two guide rails located at the bottom of the two clamping plates;

[0023] The distance between the two guide rails is less than the width of the battery cell.

[0024] Optionally, the guide rail has a second cavity for containing coolant.

[0025] Beneficial effects:

[0026] In this embodiment, two clamping plates are arranged opposite to each other and slidably mounted on a fixed base. The area between the two clamping plates can accommodate a battery cell, and this area is defined as the receiving area. By sliding the two clamping plates on the fixed base, the battery cell located between the two clamping plates can be clamped and fixed. The clamping plates have a first cavity inside and are equipped with a drive pump for injecting coolant into the first cavity. Through the coolant in the first cavity, the two clamping plates can cool down the battery cell during the clamping process.

[0027] During testing, this application utilizes two clamps to hold the battery cells, reducing or even eliminating cell displacement or movement. This reduces fluctuations in test data, improves test accuracy, and prevents short circuits caused by cell displacement or movement. Furthermore, the clamps, through the cooperation of the first cavity and the drive pump, allow the clamps to cool the battery cells using internal coolant while fixing them. This reduces or even eliminates battery overheating caused by frequent charging and discharging, thereby reducing the possibility of thermal runaway or even explosion during testing and ensuring the safety of life and property.

[0028] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0029] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0030] Figure 1 is a schematic diagram of the battery cell fixing device provided in an embodiment of this application;

[0031] Figure 2 is a schematic diagram of the cooperation between the battery cell fixing device and the battery cell provided in the embodiment of this application;

[0032] Figure 3 is another schematic diagram of the battery cell fixing device and the battery cell provided in the embodiment of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1-Clamping plate, 11-Discharge port, 2-Drive pump, 31-Screw, 32-Guide rail, 4-Battery cell. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0037] For ease of explanation, referring to Figures 1-3, the vertical length of a battery cell is defined as the length of the battery cell, the horizontal length of the battery cell parallel to the screw or guide rail is defined as the thickness of the battery cell, and the horizontal length of the battery cell perpendicular to the screw or guide rail is defined as the width of the battery cell.

[0038] The battery cell fixing device provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0039] Figure 1 is a schematic diagram of the battery cell fixing device provided in an embodiment of this application.

[0040] As shown in Figures 1-3, a battery cell fixing device includes a fixing base, a drive pump 2, and two clamping plates 1 arranged opposite to each other.

[0041] Two clamping plates 1 are slidably disposed on the fixed base, and a receiving area for fixing the battery cell 4 is formed between the two clamping plates 1. The clamping plates 1 have a first cavity for receiving coolant. The drive pump 2 is connected to the first cavity of the two clamping plates 1 respectively, and the drive pump 2 is used to pump the coolant into the first cavity.

[0042] In this embodiment, two clamping plates 1 are arranged opposite to each other and slidably mounted on a fixed base. The area between the two clamping plates 1 can accommodate a battery cell 4, and this area is defined as the receiving area. By sliding the two clamping plates 1 on the fixed base, the battery cell 4 located between the two clamping plates 1 can be clamped and fixed. The clamping plate 1 has a first cavity inside and is equipped with a drive pump 2 for injecting coolant into the first cavity. Through the coolant in the first cavity, the two clamping plates 1 can cool down the battery cell 4 during the clamping process.

[0043] Specifically, in practical applications, as shown in Figures 2 and 3, the battery cell 4 is placed between two clamping plates 1. By adjusting the distance between the two clamping plates 1, the two clamping plates 1 clamp the battery cell 4. Coolant is injected into the two clamping plates 1 by driving the pump 2. The two clamping plates 1 cool the battery cell 4 on both sides, thereby fixing the battery cell 4 and cooling it.

[0044] In this application, the clamping of the battery cell 4 by two clamping plates 1 during the testing process can reduce or even avoid the offset or shaking of the battery cell 4, thereby reducing the fluctuation of test data, improving the accuracy of the test, and avoiding battery short circuits caused by the offset or shaking of the battery cell 4. At the same time, through the cooperation of the first cavity of the clamping plate 1 and the drive pump 2, the clamping plate 1 can cool the battery cell 4 with the internal coolant while fixing the battery cell 4, thereby reducing or even avoiding the battery temperature rise caused by frequent charging and discharging, thus reducing the possibility of battery thermal runaway or even explosion during the test, and ensuring the safety of life and property during the test.

[0045] The side of each of the two clamping plates 1 facing away from the receiving area can be flat or it can be a structure that protrudes outward. By making the side of each of the two clamping plates 1 facing away from the receiving area protrude outward, the maximum volume of the first cavity inside the clamping plate 1 can be increased, thereby increasing the amount of coolant that the clamping plate 1 can hold, and thus increasing the cooling capacity of the clamping plate 1 for the battery cell 4.

[0046] The number of drive pumps 2 can be two, and the two drive pumps 2 are respectively connected to the first cavity of different clamping plates 1.

[0047] The coolant in the first cavity can be drained or replaced by removing the drive pump 2 after the test is completed and draining or replacing the coolant through the hole in the clamp 1 used to connect the drive pump 2; or the clamp 1 can be provided with an outlet 11 that communicates with the first cavity, and the coolant can be replaced simultaneously by the drive pump 2 during the test.

[0048] Optionally, in some embodiments, the clamp 1 has an inlet and an outlet 11 communicating with the first cavity, and the inlet is connected to the drive pump 2.

[0049] In this embodiment, the coolant is driven by the drive pump 2 to flow from the inlet through the first cavity and output from the outlet 11. Through the cooperation of the drive pump 2, the inlet and the outlet 11, the coolant that has not absorbed the heat of the battery cell flows continuously through the first cavity, which facilitates the replacement of the coolant during testing and improves the cooling capacity of the clamp 1 for the battery cell 4.

[0050] The liquid inlet and liquid outlet 11 of the clamping plate 1 can be located on the side of the clamping plate 1, or on the side plate of the clamping plate 1 facing away from the receiving area, as shown in Figures 1-3.

[0051] Optionally, in some embodiments, the clamping plate 1 is a hollow structure, and the hollow cavity inside the clamping plate 1 is configured as the first cavity.

[0052] In this embodiment, the clamping plate 1 can be a hollow box-shaped structure. The cavity inside the box-shaped structure is used to hold coolant. The box-shaped structure is easy to manufacture and has a large capacity, which can increase the amount of coolant stored, thereby improving the cooling capacity of the clamping plate 1.

[0053] The inlet can be connected to the bottom of the internal cavity of the box-shaped structure, and the outlet 11 can be connected to the top or near the top of the internal cavity of the box-shaped structure. Thus, by driving the pump 2 to inject coolant from the bottom of the box-shaped structure, and by outputting coolant from the outlet 11 when the coolant level reaches the height of the outlet 11, the coolant level in the clamping plate 1 can be kept relatively stable, ensuring the stability of the cooling rate, and the coolant can be naturally discharged.

[0054] Furthermore, in some embodiments, the clamp 1 has a serpentine channel configured as the first cavity.

[0055] In this embodiment, the clamping plate 1 can be a structure with serpentine channels throughout, where a serpentine channel refers to a flow channel design with a continuously curved structure, forming a meandering path. The structure of the serpentine channel is prior art and will not be described in detail here. The curved structure of the serpentine channel lengthens the flow path of the coolant, thereby extending the contact time between the fluid and the heat dissipation surface and improving the cooling efficiency of the clamping plate 1.

[0056] The inlet and outlet 11 can be connected to the two ends of the serpentine channel, respectively. The inlet can be located at the lowest point or the highest point of the serpentine channel, which facilitates the filling of the serpentine channel with coolant, avoids the accumulation of air bubbles in the serpentine channel, and thus improves the uniformity of cooling of the clamping plate 1.

[0057] Optionally, in some embodiments, the clamp 1 includes a first part and a second part, the first part having a groove on the side facing the receiving space, the second part covering the groove and cooperating with the groove to form the first cavity; the thickness of the second part is 1mm-5mm.

[0058] In this embodiment, by limiting the thickness of the second part to 1mm-5mm, the portion of the clamping plate 1 between the first cavity and the accommodating space forms a thin-walled structure. Thus, on the one hand, the thin-walled structure can improve the heat exchange capacity between the coolant and the battery cell 4, thereby improving the cooling efficiency of the clamping plate 1; on the other hand, the portion of the plate located between the first cavity and the clamping surface is prone to certain elastic deformation under hydraulic pressure, and has a tendency to expand. When the battery cell 4 is squeezed, the squeezing intensity of the battery cell 4 will be increased, thereby improving the stability of the battery cell 4 between the clamping plates 1. Moreover, this squeezing method is less likely to cause damage to the battery cell 4.

[0059] The first part and the second part can be an integrated structure or two different components that are combined and spliced ​​together to form the clamp 1.

[0060] Furthermore, in some embodiments, the clamp 1 includes a first part and a second part, the first part having a groove on the side facing the receiving space, the second part covering the groove and cooperating with the groove to form the first cavity; the second part is a flexible element made of a waterproof flexible material.

[0061] In this embodiment, the flexible component is relatively thin. Firstly, it improves the heat exchange capacity between the coolant and the battery cell 4, thereby improving cooling efficiency. Secondly, the flexible component is prone to elastic deformation under hydraulic pressure, exhibiting an expansion tendency. When the battery cell 4 is squeezed, the squeezing intensity of the battery cell 4 is increased, thereby improving the stability of the battery cell 4 between the clamping plates 1. Thirdly, the contact between the flexible component and the battery cell 4 makes it less likely to cause damage to the battery cell 4. Fourthly, it is easy to replace, thus improving the service life of the clamping plates 1.

[0062] The first part consists of high-rigidity materials, such as metals, silicon carbide, and carbon fiber.

[0063] The flexible element can be used to cover only the opening of the groove, or it can be used to cover the entire surface of the first part facing the receiving space. In this way, the clamp 1 only contacts the battery cell 4 through the flexible element, which makes it less likely to cause damage to the battery cell 4.

[0064] Specifically, when the first cavity is a serpentine channel and the flexible element covers the entire surface of the first part facing the receiving space, the groove is a serpentine groove, and the flexible element is bonded to all surfaces of the first part facing the receiving space except for the groove. Thus, the numerous partitions in the clamping plate 1 used to form the serpentine channel can support the flexible element, participating in the compression of the battery cell 4 through the flexible element when clamping it, thereby increasing the force application range of the clamping plate 1 on the battery cell 4 and improving the stability of the battery cell 4 between the clamping plates 1.

[0065] Among them, the waterproof flexible material can be a polymer film or rubber.

[0066] Optionally, in some embodiments, the fixing base includes a locking member and a guide member, the two clamping plates 1 are slidably disposed on the guide member, the locking member is detachably connected to the guide member, and the locking member is used to lock the two clamping plates 1 clamped on both sides of the battery cell 4.

[0067] In this embodiment, the two clamping plates 1 are slidably disposed on the guide member, and the guide member guides the sliding direction of the two clamping plates 1 to ensure that the two clamping plates 1 can move closer to each other in a predetermined direction. The locking member is detachably connected to the guide member. When the clamping plates 1 need to move (e.g., when the clamping plates 1 need to move away from each other to remove the battery cell 4, or when the clamping plates 1 need to move closer to each other to clamp the battery cell 4), the locking member is removed or moved to release the locking of the clamping plates 1. When the clamping plates 1 need to clamp the battery cell 4, the locking member is installed or moved to lock the two clamping plates 1 clamped on both sides of the battery cell 4, ensuring that the clamping plates 1 maintain the clamping of the battery cell 4 and improving the clamping stability of the clamping plates 1.

[0068] The locking component can be a locking block, which is detachably connected to the guide component through a slot on the guide component. The spacing of the slots is equal to the sum of the thickness of the battery cell 4 and the thickness of the two clamping plates 1. The locking component can also be a screw or nut that is threadedly connected to the guide component.

[0069] Optionally, in some embodiments, as shown in Figures 1-3, the guide includes a screw 31, and the locking element includes a nut;

[0070] The two clamping plates 1 are slidably mounted on the screw 31, and the screw 31 is threaded with nuts on the outer sides of the two clamping plates 1 respectively. The nuts are used to compress the adjacent clamping plates 1.

[0071] In this embodiment, both clamping plates 1 have through holes adapted to the outer diameter of the screw 31. By passing the screw 31 through the through holes, the clamping plates 1 are slidably mounted on the screw 31. Nuts (not shown in the figure) are threaded onto the outer sides of the two clamping plates 1 respectively. The outer sides of the two clamping plates 1 refer to the sides of the two clamping plates 1 facing away from the receiving area. By rotating the nuts, the nuts can contact the clamping plates 1 and apply a compressive force to the adjacent clamping plates 1. The maximum adjustable distance between the two clamping plates 1 can be adjusted by changing the position of the nuts, and the two clamping plates 1 can clamp the battery cell 4 by tightening the nuts and compressing the two clamping plates 1. The compressive strength of the nuts on the clamping plates 1 is adjusted, thereby adjusting the compressive strength of the clamping plates 1 on the battery cell 4. The entire adjustment process is simple and quick.

[0072] The number of screws 31 can be set to two, three, four or more, and the specific number is not limited in this embodiment.

[0073] Optionally, in some embodiments, as shown in FIG2, the guide includes two guide rails 32, and two clamping plates 1 are slidably disposed on the two guide rails 32, with the two guide rails 32 located on both sides of the two clamping plates 1; the distance between the two guide rails 32 is equal to the width of the battery cell 4.

[0074] In this embodiment, a sliding connection is achieved through the cooperation of the guide rail 32 and the clamping plate 1. By positioning the two guide rails 32 on both sides of the two clamping plates 1, and with the distance between the two guide rails 32 equal to the width of the battery cell 4, the battery cell 4 can be placed between the two guide rails 32 when clamped by the clamping plate 1. The two guide rails 32 limit the two side surfaces of the battery cell 4 in the width direction, preventing the battery cell 4 from tilting or shifting in the width direction between the two clamping plates 1. This makes the position of the battery cell 4 relatively stable between the two clamping plates 1, facilitating the stability of the battery cell 4 during testing.

[0075] And / or, in some embodiments, as shown in FIG3, the guide includes two guide rails 32, two clamping plates 1 are slidably disposed on the two guide rails 32, and the two guide rails 32 are located at the bottom of the two clamping plates 1; the distance between the two guide rails 32 is less than the width of the battery cell 4.

[0076] In this embodiment, a sliding connection is achieved through the cooperation of the guide rails 32 and the clamping plates 1. By positioning the two guide rails 32 at the bottom of the two clamping plates 1, and with the distance between the two guide rails 32 being less than the width of the battery cell 4, the battery cell 4 can be placed on the two guide rails 32 before being clamped by the clamping plates 1. This facilitates the clamping of the battery cell 4 by the clamping plates 1. At the same time, the two guide rails 32 can also limit the movement of the battery cell 4 within the two clamping plates 1 to a certain extent, reducing the possibility of the battery cell 4 tilting or shifting within the two clamping plates 1, thus facilitating the stability of the battery cell 4 during testing.

[0077] It should be noted that the guide may include four guide rails 32, wherein two guide rails 32 are located on both sides of the two clamping plates 1 and the distance between them is equal to the width of the battery cell 4, and the other two guide rails 32 are located at the bottom of the two clamping plates 1 and the distance between them is less than the width of the battery cell 4; or it may include only two guide rails 32, which may be located on both sides of the two clamping plates 1 and the distance between them is equal to the width of the battery cell 4, or they may be located at the bottom of the two clamping plates 1 and the distance between them is less than the width of the battery cell 4.

[0078] Optionally, in some embodiments, the guide rail 32 has a second cavity for containing coolant.

[0079] In this embodiment, any of the guide rails 32 can contact the battery cell 4. To prevent the surface of the guide rail 32 in contact with the battery cell 4 from absorbing heat from the battery cell 4 and causing heat concentration, which would affect the cooling effect on the battery cell 4, a second cavity for containing coolant can be provided in the guide rail 32. The coolant in the guide rail 32 allows the guide rail 32 to participate in the cooling of the battery cell 4, thereby improving the cooling effect of the entire device on the battery cell 4 and eliminating the risk caused by heat concentration.

[0080] The second cavity can be a channel that passes through the guide rail 32, with its two ends used for the inlet and outlet of coolant, respectively.

[0081] It should be noted that in some embodiments, the battery cell 4 may not be in contact with any guide rail 32. In this case, the second cavity does not need to be provided in the guide rail 32.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery cell fixing device, characterized in that, include: Fixed base; Two clamps (1) are arranged opposite to each other and are slidably mounted on the fixed base. A receiving area for fixing the battery cell (4) is formed between the two clamps (1), and the clamps (1) have a first cavity for receiving coolant. A drive pump (2) is connected to the first cavity of the two clamps (1) respectively, and the drive pump (2) is used to pump the coolant into the first cavity.

2. The battery cell fixing device according to claim 1, characterized in that, The clamp (1) is a hollow structure, and the hollow chamber inside the clamp (1) is configured as the first cavity.

3. The battery cell fixing device according to claim 1, characterized in that, The clamp (1) has a serpentine channel, which is configured as the first cavity.

4. The battery cell fixing device according to claim 1, characterized in that, The clamp (1) has an inlet and an outlet (11) that communicate with the first cavity, and the inlet is connected to the drive pump (2).

5. A battery cell fixing device according to any one of claims 1-4, characterized in that, The clamp (1) includes a first part and a second part. The first part has a groove on the side facing the receiving space, and the second part covers the groove and cooperates with the groove to form the first cavity. The thickness of the second part is 1mm-5mm.

6. A battery cell fixing device according to any one of claims 1-4, characterized in that, The clamp (1) includes a first part and a second part. The first part has a groove on the side facing the receiving space, and the second part covers the groove and cooperates with the groove to form the first cavity. The second part is a flexible part made of a waterproof flexible material.

7. The battery cell fixing device according to claim 1, characterized in that, The fixing seat includes a locking member and a guide member. The two clamping plates (1) are slidably disposed on the guide member. The locking member is detachably connected to the guide member. The locking member is used to lock the two clamping plates (1) clamped on both sides of the battery cell (4).

8. A battery cell fixing device according to claim 7, characterized in that, The guide includes a screw (31), and the locking element includes a nut; the two clamping plates (1) are slidably disposed on the screw (31), and the screw (31) is threaded with the nuts on the outer side of the two clamping plates (1), and the nuts are used to press the adjacent clamping plates (1).

9. A battery cell fixing device according to claim 7, characterized in that, The guide includes two guide rails (32), and two clamping plates (1) are slidably disposed on the two guide rails (32). The two guide rails (32) are located on both sides of the two clamping plates (1). The distance between the two guide rails (32) is equal to the width of the battery cell (4).

10. A battery cell fixing device according to claim 7, characterized in that, The guide includes two guide rails (32), and two clamping plates (1) are slidably disposed on the two guide rails (32). The two guide rails (32) are located at the bottom of the two clamping plates (1). The distance between the two guide rails (32) is less than the width of the battery cell (4).

11. A battery cell fixing device according to any one of claims 9-10, characterized in that, The guide rail (32) has a second cavity for containing coolant.

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