Battery cell heat dissipation device and battery cell test system

Abstract

The utility model provides a battery cell heat dissipation device and a battery cell test system. The battery cell heat dissipation device comprises two heat dissipation modules which are oppositely arranged and a connecting sheet assembly, a containing cavity used for clamping a to-be-tested battery cell is defined between the two heat dissipation modules, and the outer side of at least one heat dissipation module is provided with heat dissipation fins. And the connecting sheet assembly is used for connecting the battery cell and a test wire in the test cabinet so as to test the current and voltage of the battery cell to be tested. According to the battery cell heat dissipation device disclosed by the utility model, through the heat dissipation fins arranged on the outer side of the heat dissipation module, the contact area between the heat dissipation module and air can be increased, and the heat conduction efficiency and the heat dissipation effect are improved, so that heat can be quickly transferred to surrounding air through the increased contact surface; therefore, the temperature rise of the battery cell in the fast charging process can be effectively controlled, and the reliability and the safety of the test are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery performance test, especially relates to a battery heat dissipation device. BACKGROUND

[0002] Cylindrical batteries are widely used due to their high energy density, good thermal characteristics, and cost-effectiveness. With the rapid development of the new energy vehicle market, higher requirements are placed on the energy density and charging rate of batteries. In order to shorten the charging time of vehicles and improve user experience, fast charging technology has become one of the important directions of battery research and development. However, during the research and production of batteries, various performance tests are essential steps. During the testing process, especially during fast charging tests, the increased current density leads to an increase in Joule heat generated inside the battery, and the temperature rises sharply. In addition, heat accumulation caused by other operations can also cause the temperature of the battery to rise, thereby affecting the accuracy of the test results and the safety of the battery.

[0003] Existing battery testing equipment mostly fails to provide an effective heat dissipation solution, especially in the case of long-term continuous testing, the heat dissipation problem becomes particularly prominent. A common and relatively economical solution is metal plate heat dissipation, which achieves passive heat dissipation by clamping the battery between two metal plates. However, this method has obvious defects, as the contact area between the metal plate and the battery is limited, and it cannot effectively dissipate all the heat from the surface of the battery. In particular, in high-intensity charging and discharging cycles, poor heat dissipation can further accelerate the aging rate of the battery and may cause safety risks. SUMMARY

[0004] Therefore, the utility model aims to provide a battery heat dissipation device to improve the heat dissipation effect of the battery under test and ensure the reliability and safety of the test.

[0005] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0006] A battery heat dissipation device includes two heat dissipation modules arranged opposite to each other, and a connecting plate assembly.

[0007] The two heat dissipation modules define a receiving cavity for clamping the battery under test, and at least one of the heat dissipation modules has heat dissipation fins on the outer side.

[0008] The connecting plate assembly is used to connect the test line in the test cabinet to the battery under test to test the current and voltage of the battery under test.

[0009] Further, both of the heat dissipation modules are provided with profile grooves, and when the two heat dissipation modules are connected, the two profile grooves together form the receiving cavity.

[0010] Further, at least one of the heat dissipation modules is provided with a bearing part for supporting the to-be-tested battery cell; the bearing part is located at the bottom of the profiled groove.

[0011] Further, the accommodating cavity can accommodate cylindrical battery cells, square battery cells or soft package battery cells.

[0012] Further, the heat dissipation fins extend along the height direction of the heat dissipation module and are arranged in multiple; in the cross section of the heat dissipation module, the projection of each heat dissipation fin is in a triangular shape, a trapezoidal shape or a rectangular shape.

[0013] Further, a wire harness through hole is arranged between the two heat dissipation modules; the wire harness through hole is in communication with the accommodating cavity, and the wire harness through hole is used for passing a temperature sensing wire connected to the to-be-tested battery cell.

[0014] Further, the axial direction of the wire harness through hole is orthogonal to the height direction of the heat dissipation module, and the wire harness through hole is arranged on the opposite end faces of the heat dissipation module.

[0015] Further, the fastener is used for connecting the two heat dissipation modules together.

[0016] Further, the connecting sheet assembly comprises a positive connecting sheet and a negative connecting sheet; the positive connecting sheet is provided with a first connecting part electrically connected to the positive electrode of the to-be-tested battery cell, and a second connecting part electrically connected to the test wire, and the negative connecting sheet is provided with a third connecting part electrically connected to the negative electrode of the to-be-tested battery cell, and a fourth connecting part electrically connected to the test wire.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] The battery cell heat dissipation device disclosed by the utility model can increase the contact area of the heat dissipation module and air, improve the heat conduction efficiency and heat dissipation effect, make heat be rapidly transferred to the surrounding air through the increased contact surface, effectively control the temperature rise of the to-be-tested battery cell in the fast charging process, ensure the reliability and safety of the test, and have good use effect.

[0019] Further, the profiled groove is arranged on the two heat dissipation modules, and the two profiled grooves jointly form a containing cavity when the two heat dissipation modules are connected in abutment, which is simple in structure, convenient to manufacture and process, and can save manufacturing cost when the profiled grooves are of the same size. The bearing part is arranged to support the to-be-tested battery cell well, so that the to-be-tested battery cell can be well kept between the two heat dissipation modules. The containing cavity can contain a cylindrical battery cell, a square battery cell or a soft package battery cell, so that the heat dissipation device can test the cylindrical battery cell, the square battery cell or the soft package battery cell respectively.

[0020] Secondly, the heat dissipation fins extend along the height direction of the heat dissipation module and are arranged in multiple, which is beneficial to further increase the contact area with air and further improve the heat dissipation effect of the to-be-tested battery cell. The projection of the heat dissipation fin on the cross section of the heat dissipation module is triangular, trapezoidal or rectangular, which is simple in structure and convenient to design and implement. The wire harness through hole is arranged between the two heat dissipation modules, which is beneficial to the leading out of the temperature sensing wire connected with the to-be-tested battery cell. The axial direction of the wire harness through hole is arranged orthogonally to the height direction of the heat dissipation module, and the wire harness through hole is arranged on the two opposite end faces of the heat dissipation module. On the one hand, it is convenient for the processing and preparation of the wire harness through hole, and on the other hand, when the heat dissipation module is in different positions, the temperature sensing wire can be selectively led out from one of the wire harness through holes, so that the temperature sensing wire can be connected with the data acquisition end in the test cabinet.

[0021] In addition, the fastener is arranged, which is beneficial to connecting the two heat dissipation modules together, so as to better clamp the to-be-tested battery cell. The connecting piece assembly includes a positive connecting piece and a negative connecting piece, so that the first connecting part on the positive connecting piece is electrically connected with the positive electrode of the to-be-tested battery cell, and the second connecting part is electrically connected with the test wire, and the third connecting part on the negative connecting piece is electrically connected with the negative electrode of the to-be-tested battery cell, and the fourth connecting part is electrically connected with the test wire, which is simple in structure, so that the to-be-tested battery cell and the test wire of the test cabinet are well connected, and the charge and discharge test of the to-be-tested battery cell is realized.

[0022] Another purpose of the utility model lies in providing a battery cell test system, which comprises a test cabinet and the battery cell heat dissipation device.

[0023] The battery cell test system of the utility model can improve heat conduction efficiency and heat dissipation effect, and make heat rapidly transferred to surrounding air through the increased contact surface, so as to effectively control the temperature rise of the battery cell in the fast charging process, and further ensure the reliability and safety of the test. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings constituting a part of the utility model are used to provide further understanding of the utility model, and the illustrative embodiment of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:

[0025] Figure 1 A structure schematic view of the battery cell heat dissipation device is shown in the embodiment of the utility model.

[0026] Figure 2 A structure schematic view of the heat dissipation module is shown in the embodiment of the utility model.

[0027] Figure 3 A structure schematic view of the positive electrode connecting piece is shown in the embodiment of the utility model.

[0028] Figure 4 A structure schematic view of the negative electrode connecting piece is shown in the embodiment of the utility model.

[0029] Explanation of reference signs:

[0030] 1, heat dissipation module; 101, heat dissipation fin; 102, profile groove; 103, bearing part; 104, half slot; 105, connecting hole;

[0031] 2, connecting piece assembly; 21, positive electrode connecting piece; 22, negative electrode connecting piece; 200, wire harness via hole; 211, first connecting part; 212, second connecting part; 221, third connecting part; 222, fourth connecting part;

[0032] 3, fastener; 10, battery cell to be measured. DETAILED DESCRIPTION

[0033] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0034] In the description of the utility model, it should be noted that if the terms indicating the orientation or position relationship such as "upper", "lower", "inner", "outer" appear, it is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, a specific orientation and operation, so it cannot be understood as a limitation on the utility model. In addition, if the terms "first", "second" appear, they are also used for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0035] In addition, in the description of the utility model, unless otherwise explicitly limited, the terms "mounting", "connection", "connection", "connecting piece" should be understood broadly. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood in combination with the specific situation.

[0036] The utility model discloses below will refer to the drawing and combine the embodiment to explain in detail.

[0037] Embodiment one

[0038] This embodiment relates to a kind of battery heat dissipation device, it can improve the heat dissipation effect of the battery under test 10, to guarantee the reliability and safety of test.

[0039] In overall structure, referring to Figure 1 As shown, the battery heat dissipation device of this embodiment includes two heat dissipation modules 1 arranged oppositely, and connecting sheet assembly 2. Among them, the accommodation cavity for clamping the battery under test 10 is defined between two heat dissipation modules 1, and the outside of at least one heat dissipation module 1 is provided with heat dissipation fin 101. And connecting sheet assembly 2 is used to connect the test line in battery and test cabinet, to test the current and voltage of the battery under test.

[0040] At this time, as in the structure above, by heat dissipation fin 101 arranged on the outside of heat dissipation module 1, the contact area of heat dissipation module 1 and air can be increased, the heat conduction efficiency and heat dissipation effect are improved, so that heat can be rapidly transmitted to the surrounding air through the increased contact surface, so that the temperature rise of the battery under test in the fast charging process can be effectively controlled, and the reliability and safety of test are guaranteed.

[0041] In detail, as a preferred embodiment, continue to refer to Figure 1 As shown, in this embodiment, the outside of two heat dissipation modules 1 arranged oppositely is provided with heat dissipation fin 101, so that the contact area of heat dissipation module 1 and air can be further increased, and the heat conduction efficiency and heat dissipation effect are further improved.

[0042] Moreover, in this embodiment, profile groove 102 is provided on two heat dissipation modules 1, profile groove 102 can be matched with the outer surface of the battery under test 10, and when two heat dissipation modules 1 are connected, two profile grooves 102 are surrounded to form the above-mentioned accommodation cavity. The setting of profile groove 102 makes the structure of heat dissipation module 1 relatively simple, and facilitates manufacturing and processing, and when the size of profile groove 102 on each heat dissipation module 1 is the same, the manufacturing cost can be saved.

[0043] It needs to be explained here that the accommodation cavity of this embodiment can accommodate cylindrical battery, square shell battery or soft package battery, which can be adaptively set according to the structure of different types of batteries, so that the accommodation cavity can better clamp cylindrical battery or square shell battery or soft package battery, so that the heat dissipation device can perform charge and discharge test on cylindrical battery or square shell battery or soft package battery. In this embodiment, the battery under test 10 takes cylindrical battery as an example, at this time, profile groove 102 is in the form of circular arc surface, which can better match the outer circumferential surface of cylindrical battery.

[0044] It also needs to be explained that when the battery under test 10 is a square shell battery or a soft package battery, in addition to setting the profile groove 102 on both heat dissipation modules 1, it can also be set on only one of the heat dissipation modules 1, and the other heat dissipation module 1 is in contact with the outer surface of the battery under test 10 in a plane. It is also acceptable. In addition, it also needs to be explained that the material of the heat dissipation module 1 can be, for example, a metal material such as aluminum, copper, iron, etc., which has a high thermal conductivity and is beneficial to improving the heat dissipation effect.

[0045] In this embodiment, the heat dissipation fins 101 extend along the height direction of the heat dissipation module 1 and are arranged in multiple, and in the cross section of the heat dissipation module 1, the projection of each heat dissipation fin 101 is a triangle, trapezoid or rectangle. This can further increase the contact area of the heat dissipation module 1 with the air, and further improve the heat dissipation effect of the battery under test 10. And the projection of the heat dissipation fin 101 on the cross section of the heat dissipation module 1 is a triangle, trapezoid or rectangle, etc., which has the characteristics of simple structure and convenient design and implementation. It is worth mentioning here that the number of heat dissipation fins 101 can be designed according to actual needs, and this embodiment does not limit this.

[0046] As a preferred embodiment, at least one of the heat dissipation modules 1 is provided with a bearing portion 103 for supporting the battery under test 10, and the bearing portion 103 is located at the bottom of the profile groove 102. Specifically, referring to Figure 1 and Figure 2 In this embodiment, the bearing portion 103 is provided on both opposite heat dissipation modules 1, and the two bearing portions 103 are located at the bottom of the profile groove 102, and each bearing portion 103 includes a bearing boss protruding into the accommodating cavity, and the bottom of the battery under test 10 can be supported by the two bearing bosses, thereby improving the support effect of the battery under test 10 on the heat dissipation module 1, so that the battery under test 10 can be better maintained between the two heat dissipation modules 1.

[0047] Continuing to refer to Figure 1 and Figure 2 In this embodiment, a wire harness through hole 200 is also provided between the two heat dissipation modules 1. The wire harness through hole 200 communicates with the accommodating cavity, and the wire harness through hole 200 is used for the temperature sensing wire connected to the battery under test 10 to pass through. And as a further preferred embodiment, the axial direction of the wire harness through hole 200 is orthogonal to the height direction of the heat dissipation module 1, and the wire harness through hole 200 is formed at opposite ends of the heat dissipation module 1.

[0048] In this embodiment, as a feasible implementation, specifically, the half-grooves 104 are arranged on the side of each heat dissipation module 1 having the profile groove 102, and when the two heat dissipation modules 1 are connected in abutment, the two half-grooves 104 are connected in abutment to form the wire harness through hole 200, and in the specific implementation, the half-groove 104 extends along the height direction perpendicular to the heat dissipation module 1 and penetrates through the heat dissipation module 1. At this time, after the two heat dissipation modules 1 are connected in abutment, the wire harness through hole 200 formed by the abutment of the two half-grooves 104 has an axial direction perpendicular to the height direction of the heat dissipation module 1, and the wire harness through hole 200 is formed at opposite ends of the heat dissipation module 1.

[0049] The design of this structure facilitates the processing and preparation of the wire harness through hole 200, and on the other hand, when the heat dissipation module 1 is in different positions, the temperature sensing wire can be selectively led out from one of the wire harness through holes 200, thereby facilitating the connection of the temperature sensing wire with the data acquisition end in the test cabinet.

[0050] In addition, it should be pointed out that in the specific implementation, one end of the temperature sensing wire is adhered to the outer circumferential surface of the to-be-tested battery cell 10 by adhesive tape, and the other end can be selectively led out from one of the wire harness through holes 200 and connected with the data acquisition end in the test cabinet. Among them, the temperature sensing wire and the data acquisition end of the test cabinet can refer to the structure in the prior art.

[0051] In addition, the battery cell heat dissipation module 1 of the embodiment further comprises a fastener 3 for connecting the two heat dissipation modules 1 together. Specifically, the connecting holes 105 are arranged on the two heat dissipation modules 1, and the fastener 3 comprises a bolt or stud penetrating through the connecting holes 105 and a fastening nut screwed on both ends of the bolt or stud. Through the cooperation of the bolt and the fastening nut, or the cooperation of the stud and the fastening nut, the two heat dissipation modules 1 are fixedly connected together, so as to clamp the to-be-tested battery cell 10 between the two heat dissipation modules 1, ensure the fixing effect of the to-be-tested battery cell 10 on the heat dissipation module 1, and further improve the test safety.

[0052] In combination with the drawings shown in Figure 1 , Figure 3 and Figure 4 , the connecting piece assembly 2 of the embodiment comprises a positive connecting piece 21 and a negative connecting piece 22. Among them, the positive connecting piece 21 is provided with a first connecting part 211 electrically connected with the positive electrode of the to-be-tested battery cell 10, and a second connecting part 212 electrically connected with the test wire, and the negative connecting piece 22 is provided with a third connecting part 221 electrically connected with the negative electrode of the to-be-tested battery cell 10, and a fourth connecting part 222 electrically connected with the test wire.

[0053] In the embodiment, the first connecting part 211 on the positive electrode connecting sheet 21 and the third connecting part 221 on the negative electrode connecting sheet 22 are connected to the positive electrode and the negative electrode of the battery under test 10 by laser welding respectively. The third connecting part 221 is in the shape of a fan ring corresponding to the negative electrode of the cylindrical battery. The second connecting part 212 on the positive electrode connecting sheet 21 and the fourth connecting part 222 on the negative electrode connecting sheet 22 both include connecting holes 105. The second connecting part 212 and the fourth connecting part 222 are aligned with the connecting holes 105 at the ends of the test harness in the test cabinet respectively, and the positive electrode connecting sheet 21 and the negative electrode connecting sheet 22 are connected to the test harness in the test cabinet by threading the threaded connecting parts in the connecting holes 105 in sequence. The test harness in the test cabinet is the voltage harness and the current harness.

[0054] In the embodiment, the first connecting part 211 on the positive electrode connecting sheet 21 and the third connecting part 221 on the negative electrode connecting sheet 22 are connected to the positive electrode and the negative electrode of the battery under test 10 by laser welding respectively. The third connecting part 221 is in the shape of a fan ring corresponding to the negative electrode of the cylindrical battery. The second connecting part 212 on the positive electrode connecting sheet 21 and the fourth connecting part 222 on the negative electrode connecting sheet 22 both include connecting holes 105. The second connecting part 212 and the fourth connecting part 222 are aligned with the connecting holes 105 at the ends of the test harness in the test cabinet respectively, and the positive electrode connecting sheet 21 and the negative electrode connecting sheet 22 are connected to the test harness in the test cabinet by threading the threaded connecting parts in the connecting holes 105 in sequence. The test harness in the test cabinet is the voltage harness and the current harness.

[0055] In the embodiment, the first connecting part 211 on the positive electrode connecting sheet 21 and the third connecting part 221 on the negative electrode connecting sheet 22 are connected to the positive electrode and the negative electrode of the battery under test 10 by laser welding respectively. The third connecting part 221 is in the shape of a fan ring corresponding to the negative electrode of the cylindrical battery. The second connecting part 212 on the positive electrode connecting sheet 21 and the fourth connecting part 222 on the negative electrode connecting sheet 22 both include connecting holes 105. The second connecting part 212 and the fourth connecting part 222 are aligned with the connecting holes 105 at the ends of the test harness in the test cabinet respectively, and the positive electrode connecting sheet 21 and the negative electrode connecting sheet 22 are connected to the test harness in the test cabinet by threading the threaded connecting parts in the connecting holes 105 in sequence. The test harness in the test cabinet is the voltage harness and the current harness.

[0056] Embodiment Two

[0057] The embodiment relates to a battery testing system, which comprises a test cabinet and the battery cooling device in Embodiment One.

[0058] Compared with the prior art, the battery testing system in the embodiment has the same technical effects as the battery cooling device.

[0059] The above description is only preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery cell heat dissipation device, characterized in that: comprising two heat dissipation modules arranged oppositely, and a connecting plate assembly; a receiving cavity for clamping a battery cell to be tested is defined between the two heat dissipation modules, and at least one of the heat dissipation modules is provided with heat dissipation fins on the outer side; the connecting plate assembly is used to connect the battery cell and a test line in a test cabinet to test the current and voltage of the battery cell to be tested.

2. The battery cell heat dissipation device according to claim 1, characterized in that: each of the two heat dissipation modules is provided with a profiled groove; when the two heat dissipation modules are butted together, the two profiled grooves jointly form the receiving cavity.

3. The battery cell heat dissipation device according to claim 2, characterized in that: at least one of the heat dissipation modules is provided with a bearing portion for supporting the battery cell to be tested; the bearing portion is located at the bottom of the profiled groove.

4. The battery cell heat dissipation device according to claim 1, characterized in that: the receiving cavity can accommodate a cylindrical battery cell, a square battery cell or a soft package battery cell.

5. The battery cell heat dissipation device according to claim 1, characterized in that: the heat dissipation fins extend along the height direction of the heat dissipation module and are arranged in multiple; in the cross section of the heat dissipation module, the projection of each heat dissipation fin is in the shape of a triangle, trapezoid or rectangle.

6. The battery cell heat dissipation device according to claim 1, characterized in that: a wire harness through hole is arranged between the two heat dissipation modules; the wire harness through hole communicates with the receiving cavity, and the wire harness through hole is used for passing a temperature sensing wire connected to the battery cell to be tested.

7. The battery cell heat dissipation device according to claim 6, characterized in that: the axial direction of the wire harness through hole is arranged orthogonally to the height direction of the heat dissipation module, and the wire harness through hole is arranged on the opposite end faces of the heat dissipation module.

8. The battery cell heat dissipation device according to claim 1, characterized in that: further comprising a fastener; the fastener is used to connect the two heat dissipation modules together.

9. The battery cell heat dissipation device according to any one of claims 1 to 8, characterized in that: the connecting plate assembly comprises a positive connecting plate and a negative connecting plate; the positive connecting plate is provided with a first connecting portion electrically connected to the positive electrode of the battery cell to be tested, and a second connecting portion electrically connected to the test line, and the negative connecting plate is provided with a third connecting portion electrically connected to the negative electrode of the battery cell to be tested, and a fourth connecting portion electrically connected to the test line.

10. A battery cell test system, characterized in that: comprising a test cabinet and the battery cell heat dissipation device according to any one of claims 1 to 9. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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