Battery liquid cooling clamp and testing device

Abstract

The utility model discloses a battery liquid cooling clamp and a testing device, the battery liquid cooling clamp comprises a shell assembly, a cooling assembly and a positioning piece, the shell assembly is provided with an accommodating cavity, and the accommodating cavity is used for accommodating a battery; the cooling assembly is embedded in the shell assembly, and the cooling assembly is used for being communicated with the liquid cooling machine to flow cooling liquid; the positioning piece can move in the axial direction of the containing cavity and then is fixedly connected with the shell assembly, and the shell assembly and the positioning piece are used for jointly bearing the battery. The cooling assembly disclosed by the utility model can effectively control the temperature in the accommodating cavity so as to control the temperature of the battery; in addition, a positioning piece capable of moving in the axial direction of the containing cavity is further arranged in the battery liquid cooling clamp, so that the containing cavity can be matched with batteries of different heights, and the battery liquid cooling clamp has universality.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery liquid cooling fixture and a testing device. Background Art

[0002] With the vigorous development of the new energy vehicle industry, the importance of developing and innovating power batteries has become increasingly prominent. Electrical performance testing is an important part of battery research and development, and can characterize multiple electrical performance parameters of the battery. During the test, the battery clamp is an indispensable auxiliary tool. On the one hand, the battery clamp can restrain the battery to prevent damage to personnel and equipment when the battery has thermal runaway. On the other hand, the battery clamp will apply a certain amount of pressure to the battery, which can simulate the actual state of the battery in the battery pack, and the test data is more realistic.

[0003] The structure of conventional battery fixtures is very simple, and there are many shortcomings in actual use. First, the fixture has poor heat dissipation performance. When conducting high-current and high-power tests, the battery will generate a lot of heat, and conventional fixtures cannot help dissipate heat in time. However, in actual scenarios, the test device will be turned on to cool the battery after the battery pack temperature reaches the threshold, and the impact of temperature on the battery's electrical performance is significant. It can be seen that the data obtained through the test is somewhat deviated from the actual performance, which makes product development work risky. In addition, if the battery generates too much heat and the temperature exceeds the operating temperature range, it will seriously affect the safety of the battery. In severe cases, high-temperature thermal runaway will occur, and the safety of the sample itself and the test equipment will be threatened. Second, conventional fixtures have poor versatility, and batteries with different axial heights cannot use interchangeable fixtures. It is necessary to prepare a variety of fixtures to carry out battery testing, which has high testing costs and large storage space resource requirements.

[0004] In summary, the defects and shortcomings of conventional battery fixtures are:

[0005] 1. The battery generates too much heat during the test. The battery status during the test is inconsistent with the status in the actual scenario. The data obtained from the test is inaccurate, which is risky to apply to the product and has high maintenance costs.

[0006] 2. During the test, the battery generates too much heat and cannot be dissipated in time, which may easily cause thermal runaway of the battery;

[0007] 3. Batteries with different axial heights require fixtures of corresponding sizes, but the fixtures have poor versatility and high testing costs. Utility Model Content

[0008] One purpose of the utility model is to provide a battery liquid cooling fixture and a testing device, which aims to solve the technical problems of battery heat dissipation and fixture versatility.

[0009] In order to achieve the above-mentioned purpose, a solution provided by the utility model is: a battery liquid cooling clamp, which includes a shell assembly, a cooling assembly and a positioning member, the shell assembly is provided with a accommodating cavity, the accommodating cavity is used to accommodate the battery; the cooling assembly is buried in the shell assembly, and the cooling assembly is used to connect with the liquid cooler to flow coolant; the positioning member can be moved along the axial direction of the accommodating cavity and then fixedly connected to the shell assembly, and the shell assembly and the positioning member are used to jointly support the battery.

[0010] Optionally, the shell assembly includes a first seat and a second seat, the first seat is provided with a first cavity, the second seat is provided with a second cavity, the first seat and the second seat are detachably connected, the first cavity and the second cavity are connected to form the accommodating cavity, at least one of the first seat and the second seat is provided with the cooling assembly, and at least one of the first seat and the second seat is connected to the positioning member.

[0011] Optionally, the first seat and the second seat are butted together along the radial direction of the accommodating cavity, and the first cavity and the second cavity are butted and connected along the radial direction of the accommodating cavity.

[0012] Optionally, the first seat includes a first part, a second part and a third part connected in sequence, and the second part expands outward along the radial direction of the accommodating cavity to form a first cavity; the second seat includes a fourth part, a fifth part and a sixth part connected in sequence, and the fifth part expands outward along the radial direction of the accommodating cavity to form a second cavity; wherein the first part and the fourth part are connected, and the third part and the sixth part are connected.

[0013] Optionally, the first part and the fourth part are fitted together, and the third part and the sixth part are fitted together.

[0014] Optionally, along the axial direction of the accommodating cavity, the first seat and / or the second seat are provided with a plurality of limiting grooves at intervals, and the positioning member can be assembled in at least one limiting groove.

[0015] Optionally, the cooling component includes a first pipeline, a second pipeline and a connecting pipe, the first pipeline is buried in the first seat, the second pipeline is buried in the second seat, the first pipeline is provided with a first water inlet and a first water outlet exposed to the first seat, and the second pipeline is provided with a second water inlet and a second water outlet exposed to the second seat; wherein the connecting pipe connects the first water outlet and the second water inlet, and the first water inlet and the second water outlet are respectively used to connect with the liquid cooler.

[0016] Optionally, the battery liquid cooling fixture includes a plurality of screw assemblies, which respectively connect the first seat and the second seat; the first seat and the second seat are threadedly connected via the screw assemblies.

[0017] Optionally, along an axial direction perpendicular to the accommodating cavity, a cross section of the shell assembly in the accommodating cavity is the same as a cross section of the battery.

[0018] To achieve the above object, the utility model provides a solution: a test device, which includes: a liquid cooler and any of the above battery liquid cooling fixtures, and the cooling components of the liquid cooler and the battery liquid cooling fixture are connected.

[0019] The beneficial effects of the utility model are:

[0020] According to the height of the battery, the position of the positioning member is adjusted along the axial direction of the accommodating cavity, and the positioning member and the shell assembly are movably connected together, and the battery is assembled in the accommodating cavity of the shell assembly. Start the cooler to accelerate the circulation of the coolant in the cooling assembly. The coolant takes away the heat in the accommodating cavity during the flow, thereby reducing the temperature in the accommodating cavity. When the battery is subjected to high-rate and high-power electrical performance tests, the coolant in the cooling assembly can effectively reduce the temperature in the accommodating cavity, thereby reducing the temperature of the battery, thereby reducing the difference between the test environment and the actual working conditions, and obtaining more accurate and reliable data. At the same time, lowering the temperature of the battery is conducive to maintaining the battery in the operating temperature range, which greatly reduces the risk of high-temperature thermal runaway of the battery. In addition, a positioning member that can move along the axial direction of the accommodating cavity and is fixedly connected to the shell assembly is also provided inside the battery liquid cooling fixture, so that the accommodating cavity can adapt to batteries of different heights, making the battery liquid cooling fixture universal. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1 It is a schematic diagram of the assembly structure of the battery liquid cooling fixture provided by the embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of the assembly structure of the battery liquid cooling fixture provided by the embodiment of the utility model in a perspective state;

[0024] Figure 3 It is a schematic diagram of the assembly structure of the first seat and the positioning member provided in the embodiment of the utility model;

[0025] Figure 4 It is a schematic diagram of the assembly structure of the first seat, the positioning member and the cooling assembly provided by an embodiment of the utility model in a perspective state.

[0026] Description of the accompanying reference numerals: battery liquid cooling fixture 100, housing assembly 10, accommodating cavity 101, first cavity 102, second cavity 103, limiting groove 104, first seat 12, second seat 14, first part 121, second part 123, third part 125, fourth part 141, fifth part 143, sixth part 145, cooling assembly 20

[0027] The first pipeline 21 , the second pipeline 23 , the connecting pipe 25 , the positioning member 30 , and the screw assembly 40 . DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figures 1 to 4 As shown, Figure 1 1 is a schematic diagram of the assembly structure of the battery liquid cooling fixture 100 provided in an embodiment of the utility model. Figure 2 1 is a schematic diagram of the assembly structure of the battery liquid cooling fixture 100 provided in an embodiment of the utility model in a perspective state. Figure 3 1 is a schematic diagram of the assembly structure of the first seat 12 and the positioning member 30 provided in the embodiment of the utility model. Figure 4 It is a schematic diagram of the assembly structure of the first seat 12, the positioning member 30 and the cooling assembly 20 provided in an embodiment of the utility model in a perspective state.

[0030] The utility model embodiment provides a test device, which includes: a liquid cooler and a battery liquid cooling fixture 100, the battery liquid cooling fixture 100 clamps the battery, and the liquid cooler is connected to the cooling assembly 20 of the battery liquid cooling fixture 100. The liquid cooler can promote the flow of coolant in the battery liquid cooling fixture 100 to quickly remove the heat of the battery, and the liquid cooler can also control the specific temperature of the coolant to maintain the battery in a working environment at a specific temperature. The battery can be a lithium battery, a sodium battery, a lead-acid battery, etc. The coolant can be at least one of ethanol, ethylene glycol, water, etc.

[0031] Specifically, the battery liquid cooling fixture 100 includes a shell assembly 10, a cooling assembly 20 and a positioning member 30. The shell assembly 10 is provided with a receiving chamber 101, and the receiving chamber 101 is used to place the battery. The receiving chamber 101 may be similar to the shape of the battery, or may be different from the shape of the battery. The receiving chamber 101 has an axial direction and a radial direction, the axial direction is the up and down direction shown in the accompanying drawings, and the radial direction is the horizontal direction shown in the accompanying drawings. The cooling assembly 20 is buried in the shell assembly 10, and the cooling assembly 20 is used to communicate with the liquid cooler to flow the coolant. The positioning member 30 is movably connected to the shell assembly 10, and the positioning member 30 can be moved along the axial direction of the receiving chamber 101 and then fixedly connected to the shell assembly 10. The positioning member 30 can move up and down to adjust its height in the receiving chamber 101. The receiving chamber 101 is used to accommodate the battery, and the shell assembly 10 and the positioning member 30 are used to jointly support the battery. The shell assembly 10 supports the side of the battery, and the positioning member 30 supports the bottom of the battery.

[0032] In this embodiment, the position of the positioning member 30 is adjusted along the axial direction of the accommodating cavity 101 according to the height of the battery, and the positioning member 30 and the shell assembly 10 are connected together, and then the battery is assembled in the accommodating cavity 101 of the shell assembly 10 along the circumference of the accommodating cavity 101. The cooling machine is started to accelerate the circulation of the coolant in the cooling assembly 20. The coolant takes away the heat in the accommodating cavity 101 during the flow, thereby reducing the temperature in the accommodating cavity 101. When the battery is subjected to high-rate and high-power electrical performance tests, the coolant in the cooling assembly 20 can effectively reduce the temperature in the accommodating cavity 101, and then reduce the battery temperature, thereby reducing the difference between the test environment and the actual working conditions, and obtaining more accurate and reliable data. At the same time, lowering the temperature of the battery is conducive to maintaining the battery in the operating temperature range, which greatly reduces the risk of high-temperature thermal runaway of the battery. In addition, a positioning member 30 is provided inside the battery liquid cooling fixture 100, which can move axially along the accommodating cavity 101 and is fixedly connected to the shell assembly 10, so that the accommodating cavity 101 can adapt to batteries of different heights, making the battery liquid cooling fixture 100 universal.

[0033] The housing assembly 10 includes a first seat 12 and a second seat 14. The first seat 12 is provided with a first cavity 102, and the second seat 14 is provided with a second cavity 103. The first seat 12 and the second seat 14 are detachably connected, and the first cavity 102 and the second cavity 103 are connected to form a receiving cavity 101. At least one of the first seat 12 and the second seat 14 is provided with a cooling assembly 20. The cooling assembly 20 shown in the drawings is respectively provided in the first seat 12 and the second seat 14. The first seat 12 and the second seat 14 can be butted together along the axial direction of the receiving cavity 101, that is, butted in the up-and-down direction, and the first seat 12 and the second seat 14 can also be butted together along the radial direction of the receiving cavity 101, that is, butted in the horizontal direction.

[0034] The positioning member 30 may be connected to the first seat 12, or may be connected to the second seat 14, or may be connected to the first seat 12 and the second seat 14 at the same time. In this embodiment, the housing assembly 10 is decomposed into the first seat 12 and the second seat 14, so that the accommodating cavity 101 is cut into the first cavity 102 and the second cavity 103, and the accommodating cavity 101 is further spliced, so as to facilitate the manufacture of a structure in the accommodating cavity 101 that cooperates with the positioning member 30.

[0035] Furthermore, the first seat 12 and the second seat 14 are butted together along the radial direction of the accommodating cavity 101, and the first cavity 102 and the second cavity 103 are butted and connected along the radial direction of the accommodating cavity 101. In this arrangement, the accommodating cavity 101 is divided into two parts, the first cavity 102 is in a semi-open state, and the second cavity 103 is in a semi-open state, so that it is more convenient to make a structure in the accommodating cavity 101 that cooperates with the positioning member 30.

[0036] Specifically, the first seat 12 includes a first part 121, a second part 123 and a third part 125 connected in sequence, and the second part 123 expands outward along the radial direction of the accommodating cavity 101 to form a first cavity 102; the second seat 14 includes a fourth part 141, a fifth part 143 and a sixth part 145 connected in sequence, and the fifth part 143 expands outward along the radial direction of the accommodating cavity 101 to form a second cavity 103; wherein the first part 121 is connected to the fourth part 141, and the third part 125 is connected to the sixth part 145. The second portion 123 is located between the first portion 121 and the third portion 125, the fifth portion 143 is located between the fourth portion 141 and the sixth portion 145, the first cavity 102 is located between the first portion 121 and the third portion 125, and the second cavity 103 is located between the fourth portion 141 and the sixth portion 145, so that there are fixed positions on both sides of the first cavity 102 and the second cavity 103 to connect the first seat 12 and the second seat 14 together, thereby ensuring the balance and stability of the force of the accommodating cavity 101.

[0037] Further, the first part 121 and the fourth part 141 are attached, and the third part 125 and the sixth part 145 are attached. The surface of the first part 121 facing the fourth part 141 and the surface of the fourth part 141 facing the first part 121 are attached together, and the surface of the third part 125 facing the sixth part 145 and the surface of the sixth part 145 facing the third part 125 are attached together. The first part 121 and the fourth part 141 are in surface-to-surface contact, and the third part 125 and the sixth part 145 are in surface-to-surface contact, thereby increasing the contact area between the first seat 12 and the second seat 14, ensuring the heat conduction efficiency between each other, making the temperature difference range between the first seat 12 and the second seat 14 within a reasonable value, and thus the temperature in the accommodating cavity 101 is relatively balanced.

[0038] Along the axial direction of the accommodating cavity 101, the first seat 12 and / or the second seat 14 are provided with a plurality of limiting grooves 104 at intervals, and the positioning member 30 can be assembled in at least one limiting groove 104. The opening of the limiting groove 104 faces the radial direction of the accommodating cavity 101, and after the positioning member 30 is inserted into the limiting groove 104, the limiting groove 104 can limit the axial movement of the positioning member 30 in the accommodating cavity 101. The positioning member 30 can be in the shape of a thin plate, or in the shape of a concave middle and a flat side.

[0039] In one case, the limiting groove 104 can be opened in the first cavity of the first seat 12, and the positioning member 30 is inserted into the limiting groove 104 and connected to the first seat 12; in another case, the limiting groove 104 can be opened in the second cavity of the second seat 14, and the positioning member 30 is inserted into the limiting groove 104 and connected to the second seat 14; in another case, the first seat 12 has a limiting groove 104, and the second seat 14 also has a limiting groove 104, and the positioning member 30 is inserted into the limiting groove 104 and connected to the first seat 12 and the second seat 14 respectively.

[0040] The cooling assembly 20 includes a first pipeline 21, a second pipeline 23 and a connecting pipe 25. The first pipeline 21 is buried in the first seat 12, and the second pipeline 23 is buried in the second seat 14. The first pipeline 21 is provided with a first water inlet and a first water outlet exposed to the first seat 12, and the second pipeline 23 is provided with a second water inlet and a second water outlet exposed to the second seat 14; wherein the connecting pipe 25 connects the first water outlet and the second water inlet, and the first water inlet and the second water outlet are respectively used to connect with the liquid cooler.

[0041] The first pipeline 21 may be a pipe, and the pipe and the first seat 12 may be connected together by secondary injection molding, or the first pipeline 21 may be a channel reserved during the molding of the first seat 12. The second pipeline 23 may be a pipe, and the pipe and the second seat 14 may be connected together by secondary injection molding, or the second pipeline 23 may be a channel reserved during the molding of the second seat 14.

[0042] The first pipe 21 may extend along the length direction of the first seat 12, and may be stacked in multiple levels along the height direction of the first seat 12 to enhance the heat control of the first seat 12. The second pipe 23 may extend along the length direction of the second seat 14, and may be stacked in multiple levels along the height direction of the second seat 14 to enhance the heat control of the second seat 14.

[0043] The battery liquid cooling fixture 100 includes a plurality of screw assemblies 40 , through which the first seat 12 and the second seat 14 are threadedly connected. The screw assemblies 40 respectively connect the first seat 12 and the second seat 14 . At this time, the screw assemblies 40 serve to fasten the first seat 12 and the second seat 14 .

[0044] In one embodiment, the screw assembly 40 includes a screw rod and a nut, the screw rod sequentially passes through the first seat 12 and the second seat 14 along the docking direction of the first cavity 102 and the second cavity 103, and the nut is connected to the screw rod. The extending direction of the screw rod is the same as the docking direction of the first cavity 102 and the second cavity 103, so that the screw rod itself plays a guiding role, docking the first seat 12 and the second seat 14 together along the fixed direction.

[0045] In another case, the first seat 12 is provided with a threaded hole, the second seat 14 is provided with a through hole, and the screw assembly 40 passes through the through hole and is threadedly connected to the first seat 12. As an alternative, the first seat 12 is provided with a through hole, the second seat 14 is provided with a threaded hole, and the screw assembly 40 passes through the through hole and is threadedly connected to the second seat 14.

[0046] The radial cross section of the accommodating cavity 101 is the same as the cross section of the battery. For example, when the cross section of the battery is circular, the radial cross section of the accommodating cavity 101 is also circular; when the cross section of the battery is square, the radial cross section of the accommodating cavity 101 is also square. In this way, the accommodating cavity 101 can completely wrap the side of the battery and absorb the heat of the battery.

[0047] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) 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 indication will also change accordingly.

[0048] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or may be indirectly connected to the other element through an intermediate element.

[0049] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying 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 this 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 present utility model.

[0050] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A battery liquid cooling fixture, characterized in that: include: The housing assembly is provided with a housing cavity, wherein the housing cavity is used to accommodate a battery; A cooling assembly, embedded in the housing assembly, the cooling assembly being used to communicate with a liquid cooler to flow cooling liquid; and The positioning member can be moved along the axial direction of the accommodating cavity and then fixedly connected to the shell assembly. The shell assembly and the positioning member are used to jointly carry the battery.

2. The battery liquid cooling fixture according to claim 1, characterized in that: The shell assembly includes a first seat and a second seat, the first seat is provided with a first cavity, the second seat is provided with a second cavity, the first seat and the second seat are detachably connected, the first cavity and the second cavity are connected to form the accommodating cavity, at least one of the first seat and the second seat is provided with the cooling assembly, and at least one of the first seat and the second seat is connected to the positioning member.

3. The battery liquid cooling fixture according to claim 2, characterized in that: The first seat and the second seat are butted together along the radial direction of the accommodating cavity, and the first cavity and the second cavity are butted and communicated along the radial direction of the accommodating cavity.

4. The battery liquid cooling fixture according to claim 2, characterized in that: The first seat comprises a first portion, a second portion and a third portion connected in sequence, the second portion expands outwardly in the radial direction of the accommodating cavity to form the first cavity; the second seat comprises a fourth portion, a fifth portion and a sixth portion connected in sequence, the fifth portion expands outwardly in the radial direction of the accommodating cavity to form the second cavity; Among them, the first part is connected to the fourth part, and the third part is connected to the sixth part.

5. The battery liquid cooling fixture according to claim 4, characterized in that: The first part is bonded to the fourth part, and the third part is bonded to the sixth part.

6. The battery liquid cooling fixture according to claim 2, characterized in that: Along the axial direction of the accommodating cavity, the first seat and / or the second seat are provided with a plurality of limiting grooves at intervals, and the positioning member can be assembled in at least one of the limiting grooves.

7. The battery liquid cooling fixture according to claim 2, characterized in that: The cooling assembly includes a first pipeline, a second pipeline and a connecting pipe, the first pipeline is buried in the first seat, the second pipeline is buried in the second seat, the first pipeline is provided with a first water inlet and a first water outlet exposed to the first seat, and the second pipeline is provided with a second water inlet and a second water outlet exposed to the second seat; Wherein, the connecting pipe connects the first water outlet and the second water inlet, and the first water inlet and the second water outlet are respectively used to connect with the liquid cooling machine.

8. The battery liquid cooling fixture according to claim 2, characterized in that: It also includes a plurality of screw assemblies, and the first seat and the second seat are threadedly connected by the screw assemblies.

9. The battery liquid cooling fixture according to claim 1, characterized in that: Along an axial direction perpendicular to the accommodating cavity, a cross section of the shell component in the accommodating cavity is the same as a cross section of the battery.

10. A testing device, characterized in that: The testing device comprises: a liquid cooler and a battery liquid cooling fixture as claimed in any one of claims 1 to 9, wherein the liquid cooler is connected to a cooling component of the battery liquid cooling fixture.

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