Cooling clamp for battery testing and battery testing device

Abstract

The utility model belongs to the technical field of batteries, and discloses a cooling clamp for battery testing and a battery testing device. The cooling clamp for battery testing comprises a supporting piece, the supporting piece is connected with a first clamping piece and a second clamping piece, a clamping space is formed between the first clamping piece and the second clamping piece, a to-be-tested battery is used for being clamped in the clamping space, and in the first clamping piece and the second clamping piece, the clamping space between the first clamping piece and the second clamping piece is larger than the clamping space between the first clamping piece and the second clamping piece. At least one of the heat conduction pieces is a heat conduction piece, and the heat conduction piece is matched with the to-be-tested battery in a heat exchange mode so as to absorb heat from the to-be-tested battery. The cooling clamp can clamp and fix the battery and absorb heat generated in the charging and discharging process of the battery, the temperature of the battery is prevented from being too high in the cyclic charging and discharging process of the battery, and the cycle performance, the service life and the test efficiency of the battery are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to battery technical field, concretely relates to a cooling fixture for battery test and battery testing arrangement. BACKGROUND

[0002] With the rapid development of the electric vehicle market, the performance and safety of the battery system are increasingly concerned. Among them, the fast charging cycle performance of the battery is one of the important factors affecting the performance of the battery system. The battery fast charging cycle test is essential in the battery development process. The existing battery test system mainly simulates the working environment of the battery to test and evaluate its performance. However, due to the large amount of heat generated during the battery fast charging cycle test, the battery temperature rises, affecting the cycle performance and life of the battery. SUMMARY

[0003] In view of the above defects or deficiencies in the prior art, it is desirable to provide a cooling fixture for battery test and a battery testing device to solve the problem of temperature rise during battery fast charging cycle and improve the performance and cycle life of the battery.

[0004] In a first aspect of the utility model, a cooling fixture for battery test is provided, which includes a support member, a first clamping member and a second clamping member connected to the support member, a clamping space formed between the first clamping member and the second clamping member, a battery to be tested clamped in the clamping space, and at least one of the first clamping member and the second clamping member being a heat conducting member, the heat conducting member being in heat exchange cooperation with the battery to be tested to absorb heat from the battery to be tested.

[0005] In addition, the cooling fixture for battery test of the utility model can also have the following additional technical features:

[0006] As a realizable way, the opposite faces of the first clamping member and the second clamping member are clamping cooperation surfaces conforming to the surface of the battery to be tested, and the clamping cooperation surfaces form the clamping space.

[0007] As a realizable way, the opposite faces of the first clamping member and the second clamping member are flat surfaces, and the flat surfaces cover at least the surface of the battery to be tested.

[0008] As a realizable way, the heat conducting member is provided with a liquid flow channel, a cooling medium is introduced into the liquid flow channel, and the cooling medium is used for heat exchange cooperation between the heat conducting member and the battery to be tested.

[0009] As a realizable way, the first clamping member and the second clamping member are both heat conducting members, and the liquid flow channels of the heat conducting members are connected by an adapter pipe.

[0010] As a realizable mode, a groove is formed on at least one side wall of the opposite side walls of the first clamping piece and the second clamping piece, a heat insulation layer and a first temperature sensor are arranged in the groove, the first temperature sensor has a signal acquisition surface, the signal acquisition surface is arranged flush with a clamping surface of the first clamping piece or the second clamping piece, and the first temperature sensor is used to acquire the surface temperature of the battery to be tested.

[0011] As a realizable mode, a first support plate and a second support plate are sequentially arranged on a side of the second clamping piece away from the first clamping piece, the first support plate is in sliding connection with the support piece, and the second support plate is in detachable connection with the support piece.

[0012] A pressure sensor is arranged between the first support plate and the second support plate, the pressure sensor has a sensing plane, the sensing plane is in contact with the first support plate, and the pressure sensor acquires the pressure of the battery to be tested based on the pressure sensing plane.

[0013] As a realizable mode, a limiting groove is formed on the second support plate.

[0014] The pressure sensor comprises a base body, a pressure sensing body is protrusively arranged on the base body, the pressure sensing body has the pressure sensing plane, the base body is partially assembled into the limiting groove, and the base body is fixedly connected with the second support plate.

[0015] As a realizable mode, the limiting groove is a square limiting groove, and an avoiding groove for avoiding the base body is arranged at a corner of the square limiting groove.

[0016] As a realizable mode, a third support plate is arranged on a side of the first clamping piece away from the second clamping piece, and the third support plate is in sliding connection with the support piece.

[0017] As a realizable mode, the first clamping piece and the second clamping piece are provided with avoiding openings for avoiding the support piece, the support piece sequentially passes through the avoiding openings of the first clamping piece and the second clamping piece, and the support piece is in sliding connection with the first clamping piece and the second clamping piece.

[0018] In the second aspect, the utility model provides a battery testing device, the battery testing device includes: cooling equipment and the cooling clamp for battery test of any embodiment of the application, the cooling equipment is communicated with the heat conduction piece and is used for providing cooling medium to the heat conduction piece.

[0019] As a realizable mode, a liquid flow channel is arranged in the heat conduction piece, the liquid flow channel has a liquid inlet and a liquid return port.

[0020] The cooling clamps are multiple, the liquid inlet of each cooling clamp is communicated with the cooling device through a liquid inlet pipe, and the liquid return port of each cooling clamp is communicated with the cooling device through a liquid return pipe.

[0021] As an implementation manner, the liquid inlet pipe is provided with a second temperature sensor for acquiring the temperature of the cooling medium in the liquid inlet pipe.

[0022] The liquid return pipe is provided with a third temperature sensor for acquiring the temperature of the cooling medium in the liquid return pipe.

[0023] As an implementation manner, the battery testing device further comprises a testing device, the signal output ends of the second temperature sensor and the third temperature sensor are electrically connected with the signal input end of the testing device, and the signal output end of the testing device is electrically connected with the control end of the cooling device.

[0024] The testing device determines the liquid supply flow rate of the cooling device based on the temperature of the cooling medium in the liquid inlet pipe and the temperature of the cooling medium in the liquid return pipe.

[0025] According to the cooling clamp for battery testing and the battery testing device, the battery can be clamped by the cooling clamp, and the heat generated in the charging and discharging process of the battery can be absorbed to perform heat dissipation treatment on the battery, so that the temperature of the battery is prevented from being too high in the battery cycle charging and discharging process, and the cycle performance and service life of the battery and the testing efficiency are improved, and the cooling clamp is suitable for testing of soft package batteries, square shell batteries and the like. BRIEF DESCRIPTION OF DRAWINGS

[0026] Other features, objects and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments, made with reference to the accompanying drawings:

[0027] Figure 1 A perspective view of the cooling clamp for battery testing provided by the embodiment of the application is shown in the figure;

[0028] Figure 2 A side view of the cooling clamp for battery testing provided by the embodiment of the application is shown in the figure;

[0029] Figure 3 A sectional view of the cooling clamp for battery testing provided by the embodiment of the application is shown in the figure;

[0030] Figure 4 A structure diagram of the first clamping part provided by the embodiment of the application is shown in the figure;

[0031] Figure 5 A structure diagram of the pressure sensor provided by the embodiment of the application is shown in the figure;

[0032] Figure 6 A structure diagram of a second support plate provided for an embodiment of the present application is shown in the following figure:

[0033] Figure 7 A structure diagram of a second support plate provided for an embodiment of the present application is shown in the following figure: Figure 2 A local enlarged view of A in the above figure is shown in the following figure:

[0034] Figure 8 An exemplary structure diagram of a battery testing device provided for an embodiment of the present application is shown in the following figure:

[0035] Figure 9 An exemplary structure diagram of a battery testing device provided for an embodiment of the present application is shown in the following figure:

[0036] Figure 10 An exemplary flow chart of a battery testing method provided for an embodiment of the present application is shown in the following figure:

[0037] In the above figures:

[0038] 100 cooling clamp; 110 first clamping member; 111 avoiding opening; 112 groove; 120 second clamping member; 130 liquid flow channel; 131 liquid inlet; 132 liquid return; 133 switching pipe; 140 supporting member; 150 first temperature sensor; 160 first support plate; 161 second support plate; 1611 limiting groove; 1612 avoiding groove; 162 third support plate; 170 pressure sensor; 171 base; 172 pressure sensing body; 180 battery; 190 heat insulation layer;

[0039] 200 battery testing device; 210 cooling device; 211 liquid inlet pipe; 212 liquid return pipe; 220 second temperature sensor; 230 third temperature sensor. DETAILED DESCRIPTION

[0040] The present application will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended for the purpose of explanation and are not intended to limit the present application. It should also be noted that, for the purpose of description, only parts related to the present application are shown in the accompanying drawings.

[0041] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0042] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "and / or", as used herein, refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0043] The term "include," as used herein, is meant to be equivalent to "comprise," and is intended to be inclusive, and not exclusive.

[0044] In the description of the specification, the terms "one embodiment", "some embodiments”, "exemplary embodiment”, "example”, “specific example” or “some examples” are intended to indicate that the particular feature, structure, material, or characteristic following the term is included in at least one embodiment or example of the present disclosure. The repeatedly used terms "embodiment" or "example" do not necessarily refer to the same embodiment or example. In addition, the described particular feature, structure, material or characteristic can be included in one or more embodiments or examples in any appropriate manner.

[0045] The terms "first", "second", etc. are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0046] Reference Figures 1 to 3 In a first aspect of the embodiments of the present application, a cooling clamp 100 for battery testing is provided, which includes a support 140, a first clamping member 110 and a second clamping member 120 connected to the support 140, a clamping space formed between the first clamping member 110 and the second clamping member 120, a battery 180 to be tested clamped in the clamping space, and at least one of the first clamping member 110 and the second clamping member 120 is a heat conducting member, which is in heat exchange cooperation with the battery 180 to be tested to absorb heat from the battery 180 to be tested.

[0047] Specifically, the support 140 can be a support rod, the first clamping piece 110 and the second clamping piece 120 are slidingly installed on the support rod, and the battery 180 is clamped in a clamping space formed by the first clamping piece 110 and the second clamping piece 120 to fix the battery 180. And the first clamping piece 110 and the second clamping piece 120 slide relative to the support rod, so that the size of the clamping space can be adjusted to meet the test requirements of batteries 180 of different sizes and models. The first clamping piece 110 or / and the second clamping piece 120 is a heat conducting piece, so that when the battery 180 is clamped and fixed and the battery 180 is subjected to a cyclic charge and discharge test, the heat conducting piece can exchange heat with the battery 180 to absorb the heat generated by the battery 180, thereby improving the heat dissipation effect of the battery 180. The battery 180 to be tested can be a lithium battery 180, a lead-acid battery 180, etc. The heat conducting piece is made of a material with good heat conductivity, including but not limited to aluminum alloy, aluminum, iron, copper, steel, etc. metal materials.

[0048] It can be understood that the first clamping piece 110 or the second clamping piece 120 is a heat conducting piece, which can realize one-side cooling and heat dissipation of the battery 180; the first clamping piece 110 and the second clamping piece 120 are both heat conducting pieces, which can realize two-side cooling and heat dissipation of the battery 180, and the heat dissipation effect is better.

[0049] The cooling clamp 100 provided by the embodiment of the present application is used for cyclic charge and discharge test of the battery 180. The battery 180 can be clamped by the cooling clamp 100, and the heat generated during the charge and discharge process of the battery 180 can be absorbed to dissipate heat of the battery 180, so as to avoid that the temperature of the battery 180 is too high during the cyclic charge and discharge process of the battery 180, improve the cyclic performance and service life of the battery 180 and the test efficiency, and be suitable for test of soft package battery 180, square shell battery 180, etc.

[0050] As an implementable manner, the opposite surfaces of the first clamping piece 110 and the second clamping piece 120 are clamping matching surfaces which are shaped according to the surface of the battery 180 to be tested, and the clamping matching surfaces form the clamping space.

[0051] Specifically, the clamping matching surfaces are set according to the shape of the battery 180 to meet the fixing and heat dissipation requirements of batteries 180 of different shapes. For example, the clamping matching surfaces can be flat surfaces, curved surfaces or irregular surfaces, etc.

[0052] As an implementable manner, with reference to Figures 1 to 3 , the opposite surfaces of the first clamping piece 110 and the second clamping piece 120 are flat surfaces, and the flat surfaces cover at least the surface of the battery 180 to be tested.

[0053] In this example, the clamping surface is a flat surface for clamping and fixing the square battery 180, and the flat surface covers at least the surface of the battery 180, increases the contact area between the heat conduction member and the surface of the battery 180, and improves the heat dissipation effect on the battery 180.

[0054] As an implementation manner, refer to Figures 1 to 4 The heat conduction member is provided with a liquid flow channel 130, and the liquid flow channel 130 is used to introduce a cooling medium, and the cooling medium is used to exchange heat with the battery 180 through the heat conduction member.

[0055] Specifically, the liquid flow channel 130 is arranged through the heat conduction member, and the two ends of the heat conduction member extending out of the heat conduction member are respectively provided with a liquid inlet 131 and a liquid return port 132. The liquid inlet 131 and the liquid return port 132 are both in communication with the cooling device 210, and the cooling device 210 is used to circulate and input the cooling medium into the liquid flow channel 130. The cooling medium exchanges heat with the battery 180 through the heat conduction member to continuously cool and dissipate heat of the battery 180, so as to avoid that the temperature of the battery 180 is too high. The cooling medium can be water, air, hydrogen, nitrogen, etc.

[0056] As an implementation manner, refer to Figure 2 The first clamping member 110 and the second clamping member 120 are both heat conduction members, and the liquid flow channels 130 of the heat conduction members are in communication through the adapter pipe 133.

[0057] In this example, the first clamping member 110 and the second clamping member 120 are both heat conduction members, and the heat conduction member can be a heat conduction plate. The liquid flow channels 130 are arranged in the two heat conduction plates, and the two liquid flow channels 130 are in communication through the adapter pipe 133. Through the cooperation of the liquid flow channel 130 and the adapter pipe 133, the cooling medium can circulate through the upper and lower surfaces of the battery 180, and the cooling and heat dissipation efficiency of the battery 180 is higher.

[0058] As an implementation manner, refer to Figure 2 and Figure 7 At least one of the opposite side walls of the first clamping member 110 and the second clamping member 120 is provided with a groove 112, and the groove 112 is provided with a heat insulation layer 190 and a first temperature sensor 150. The first temperature sensor 150 has a signal acquisition surface, which is flush with the clamping surface of the first clamping member 110 or the second clamping member 120. The first temperature sensor 150 is used to acquire the surface temperature of the battery 180 to be tested.

[0059] In the example, the first clamping piece 110 or / and the second clamping piece 120 is provided with a groove 112 on the opposite side wall, and a heat insulation layer 190 and a first temperature sensor 150 are fixedly arranged in the groove 112, for example, by means of gluing, screwing, riveting, welding and the like. The heat insulation layer 190 is made of heat insulation silica gel or the like, and the shape of the heat insulation layer 190 is matched with the shape of the groove 112. In the example, the groove 112 is a U-shaped groove, and the corresponding heat insulation layer 190 is a U-shaped heat insulation layer. The arrangement of the heat insulation layer 190 can prevent the first temperature sensor 150 from directly contacting the first clamping piece 110 and the second clamping piece 120, and prevent the first clamping piece 110 and the second clamping piece 120 from affecting the temperature measurement of the first temperature sensor 150. The first temperature sensor 150 has a signal acquisition surface, which is arranged flush with the clamping surface of the first clamping piece 110 or the second clamping piece 120. When the first clamping piece 110 and the second clamping piece 120 clamp the battery, the signal acquisition surface of the first temperature sensor 150 can be directly attached to the surface of the battery to obtain the temperature of the surface of the battery. The first temperature sensor 150 located in the groove 112 of the first clamping piece 110 is used to obtain the temperature of the upper surface of the battery 180, and the first temperature sensor 150 located in the groove 112 of the second clamping piece 120 is used to obtain the temperature of the lower surface of the battery 180.

[0060] As an implementation manner, refer to Figures 1 to 3 The second clamping piece 120 is provided with a first support plate 160 and a second support plate 161 in sequence away from the first clamping piece 110, the first support plate 160 is slidably connected with the support piece 140, and the second support plate 161 is detachably connected with the support piece 140.

[0061] The first support plate 160 and the second support plate 161 are provided with a pressure sensor 170, the pressure sensor 170 has a sensing plane, the sensing plane is in contact with the first support plate 160, and the pressure sensor 170 obtains the pressure of the battery 180 to be tested based on the pressure sensing plane.

[0062] The first support plate 160 is slidably connected with the support piece 140, which means that the first support plate 160 is provided with a mounting hole penetrating through, and the support piece 140 penetrates through the mounting hole to be slidably connected with the first support plate 160, so that the first support plate 160 can slide relative to the support piece 140. The first support plate 160 can support the second clamping piece 120 to ensure the stability of the second clamping piece 120. The second support plate 161 is detachably connected with the support piece 140, for example, by means of screwing, plug-in connection and the like.

[0063] The pressure sensor 170 is fixedly arranged between the first support plate 160 and the second support plate 161, an upper end surface of the pressure sensor 170 is a pressure sensing surface, the pressure sensing surface is in contact with the first support plate 160, and the expansion force, the shrinkage force and the like generated by the battery 180 in the charging and discharging cycle process can be obtained through the pressure sensing surface, so that the pressure of the battery 180 in the cycle charging and discharging process can be monitored.

[0064] Further, as a realizable manner, referring to Figure 5 and Figure 6 , a limiting groove 1611 is arranged on the second support plate 161; the pressure sensor 170 comprises a base body 171, a pressure sensing body 172 is protrudingly arranged on the base body 171, the pressure sensing body 172 has the pressure sensing surface, and the base body 171 is partially assembled into the limiting groove 1611 and is fixedly connected with the second support plate 161.

[0065] Specifically, the bottom end of the base body 171 is fixedly arranged in the limiting groove 1611 of the second support plate 161 through a bolt, the upper end of the base body 171 is protrudingly provided with the pressure sensing body 172, the side, away from the base body 171, of the pressure sensing body 172 has the pressure sensing surface, and the pressure of the battery 180 to be tested can be obtained through the pressure sensing surface.

[0066] As a realizable manner, referring to Figure 6 , the limiting groove 1611 is a square limiting groove 1611, and an avoiding groove 1612 for avoiding the base body 171 is arranged at the corner of the square limiting groove 1611.

[0067] In this example, the base body 171 is a square base body 171, the limiting groove 1611 is a square limiting groove 1611 matched with the shape of the base body 171, so that the base body 171 can be fixedly assembled into the limiting groove 1611 in an embedded manner, and the avoiding groove 1612 for avoiding the base body 171 is arranged at the four corners of the square limiting groove 1611, so as to avoid damage to the pressure sensor 170.

[0068] As a realizable manner, referring to Figures 1 to 3 , the first clamping piece 110 is provided with a third support plate 162 away from the second clamping piece 120, and the third support plate 162 is slidably connected with the support piece 140.

[0069] Specifically, the first clamping piece 110 and the second clamping piece 120 are provided with a first supporting plate 160 and a third supporting plate 162 respectively on the side away from each other, and the first supporting plate 160 and the third supporting plate 162 are both in sliding connection with the supporting piece 140, so that the size of the clamping space can be adjusted, and through the cooperation of the first supporting plate 160 and the third supporting plate 162, stable support can be formed on the first clamping piece 110 and the second clamping piece 120, so as to ensure that the temperature of the battery to be tested 180 is fixed in the clamping space formed by the first clamping piece 110 and the second clamping piece 120.

[0070] As an implementation manner, refer to Figure 4 The first clamping piece 110 and the second clamping piece 120 are provided with a first supporting plate 160 and a third supporting plate 162 respectively on the side away from each other, and the first supporting plate 160 and the third supporting plate 162 are both in sliding connection with the supporting piece 140, so that the size of the clamping space can be adjusted, and through the cooperation of the first supporting plate 160 and the third supporting plate 162, stable support can be formed on the first clamping piece 110 and the second clamping piece 120, so as to ensure that the temperature of the battery to be tested 180 is fixed in the clamping space formed by the first clamping piece 110 and the second clamping piece 120.

[0071] Specifically, the first clamping piece 110 and the second clamping piece 120 are fixed by the cooperation of the first supporting plate 160 and the third supporting plate 162. Therefore, the first clamping piece 110 and the second clamping piece 120 are provided with a first supporting plate 160 and a third supporting plate 162 respectively on the side away from each other, and the first supporting plate 160 and the third supporting plate 162 are both in sliding connection with the supporting piece 140, so that the size of the clamping space can be adjusted, and through the cooperation of the first supporting plate 160 and the third supporting plate 162, stable support can be formed on the first clamping piece 110 and the second clamping piece 120, so as to ensure that the temperature of the battery to be tested 180 is fixed in the clamping space formed by the first clamping piece 110 and the second clamping piece 120.

[0072] In the embodiment of the application, the supporting piece 140 is at least two, preferably 3-4, to form a powerful support on the first clamping piece 110 and the second clamping piece 120. It can be understood that the upper end of the supporting piece 140 can have external threads, and is provided with a nut matched with the external threads, so as to lock and fix the first supporting plate 160, the second supporting plate 161 and the third supporting plate 162, or a buckle can be used to lock and fix the second supporting plate 161.

[0073] The second aspect of the utility model, refer to Figure 8 And Figure 9 A battery testing device 200 is provided, which comprises a cooling device 210 and the cooling clamp 100 for battery testing according to any embodiment of the application, and the cooling device 210 is in communication with the heat conducting piece and is used for providing cooling medium into the heat conducting piece.

[0074] The cooling device 210 can be a water chiller, which is in communication with the liquid inlet 131 and the liquid return port 132 of the liquid flow channel 130 in the heat conduction member, and has a single-stage refrigeration structure with one refrigeration system, which mainly includes a compressor, a condenser, a throttle valve and an evaporator. The compressor compresses the low-temperature and low-pressure gas into high-temperature and high-pressure gas. The condenser changes the high-temperature and high-pressure gas discharged by the compressor into low-temperature and high-pressure liquid. The throttle valve changes the low-temperature and high-pressure liquid discharged by the condenser into low-temperature and low-pressure liquid. The low-temperature and low-pressure liquid enters the evaporator, and the low-temperature and low-pressure liquid evaporates to absorb heat, so that the temperature of the surface of the evaporator is reduced. The evaporator is a key component of the water chiller. The evaporator exchanges heat with the cooling water, absorbs heat and reduces the temperature of the water, and then sends the low-temperature water to the liquid flow channel 130 to cool and dissipate heat for the battery 180.

[0075] The specific technical features and technical effects of the battery testing device 200 provided by the embodiments of the present application are consistent with the technical features and technical effects of the cooling clamp 100 for battery testing described in any embodiment of the present application. The embodiments of the present application will not be described again.

[0076] As an implementation manner, referring to Figure 9 , the heat conduction member is provided with a liquid flow channel 130, and the liquid flow channel 130 has a liquid inlet 131 and a liquid return port 132;

[0077] The cooling clamp 100 is provided in communication with the cooling device 210 through the liquid inlet pipe 211 and the liquid return pipe 212.

[0078] In this example, the cooling clamp 100 is provided in communication with the cooling device 210 through the same liquid inlet pipe 211 and the same liquid return pipe 212, which reduces the number of components of the liquid inlet pipe 211, the liquid return pipe 212 and the cooling device 210, saves costs, and can realize the cycle charging and discharging test of multiple batteries 180 at one time, realizes the cooling and heat dissipation of multiple batteries 180, and improves the test efficiency of the battery 180.

[0079] It can be understood that the liquid inlet pipe 211 and the liquid return pipe 212 can be provided with a water pump, a stop valve and other conventional components.

[0080] As an implementation manner, referring to Figure 8 , the liquid inlet pipe 211 is provided with a second temperature sensor 220, and the second temperature sensor 220 is used to obtain the temperature of the cooling medium in the liquid inlet pipe 211;

[0081] The return pipe 212 is provided with a third temperature sensor 230 for acquiring the temperature of the cooling medium in the return pipe 212.

[0082] In this example, the temperatures of the cooling medium in the inlet pipe 211 and the return pipe 212 can be monitored in real time by the second temperature sensor 220 and the third temperature sensor 230, and based on the temperature information acquired by the second temperature sensor 220 and the third temperature sensor 230, the subsequent precise adjustment of the liquid supply amount of the cooling device 210 is facilitated.

[0083] It should be noted that the inlet pipe 211 or / and the return pipe 212 is provided with a pressure sensor 170, and the pressure of the cooling medium in the inlet pipe 211 and the return pipe 212 can be monitored in real time by the pressure sensor 170, so as to ensure that the pressure is always within a controllable range.

[0084] Further, the battery testing device 200 further comprises a testing device, the signal output ends of the second temperature sensor 220 and the third temperature sensor 230 are electrically connected with the signal input end of the testing device, and the signal output end of the testing device is electrically connected with the control end of the cooling device 210.

[0085] The testing device determines the liquid supply flow rate of the cooling device 210 based on the temperature of the cooling medium in the inlet pipe 211 and the temperature of the cooling medium in the return pipe 212.

[0086] Specifically, the signal output ends of the first temperature sensor 150, the second temperature sensor 220 and the third temperature sensor are electrically connected with the signal input end of the testing device, and the testing device can determine whether to increase or decrease the liquid supply flow rate of the cooling device 210 according to the temperature information of the surface of the battery 180 acquired by the first temperature sensor 150, and in combination with the temperature information acquired by the second temperature sensor 220 and the third temperature sensor, the liquid supply flow rate of the cooling device 210 can be accurately determined, so that the temperature of the surface of the battery 180 is always maintained within a controllable range, and the cycle charge-discharge performance and the life of the battery 180 are further improved. The signal output end of the pressure sensor 170 is electrically connected with the signal input end of the testing device, and the testing device can monitor the pressure of the battery 180 in real time through the pressure sensor 170.

[0087] It can be understood that the test equipment is a conventional equipment in the art, which can detect the basic parameters of the battery 180, such as measuring the voltage, current, internal resistance, charging and discharging performance, capacity and other basic parameters of the battery 180, to ensure that the performance of the battery 180 meets the standard; through simulating extreme environment such as high temperature, short circuit and the like, the test equipment can evaluate the safety performance of the battery 180, to ensure the stability and safety of the battery 180 under various harsh conditions; and through accurate data collection and analysis, the test equipment can optimize the management strategy of the battery 180, improve the cycle life and use efficiency of the battery 180, and prolong the service life of the battery 180.

[0088] In a third aspect, the utility model provides a battery test method 300, the test method is based on the cooling clamp 100 for battery test of any embodiment of the application, or based on the battery test device 200 of any embodiment of the application, the method comprises:

[0089] S310: the battery 180 to be tested is clamped in the clamping space formed by the first clamping piece 110 and the second clamping piece 120, and the battery 180 to be tested is subjected to cyclic charging and discharging test;

[0090] S320: in the process of cyclic charging and discharging test of the battery 180 to be tested, the heat exchange cooperation of the heat conduction piece and the battery 180 to be tested is carried out to absorb the heat of the battery 180 to be tested.

[0091] In this example, the battery 180 is clamped and fixed in the clamping space formed by the first clamping piece 110 and the second clamping piece 120, and the heat generated in the charging and discharging process of the battery 180 is absorbed by the heat conduction piece to dissipate heat of the battery 180, so as to avoid that the temperature of the battery 180 is too high in the process of cyclic charging and discharging of the battery 180, and improve the cycle performance and life of the battery 180 and the test efficiency.

[0092] The specific technical features and technical effects of the battery test method provided by the embodiments of the application are the same as those of the cooling clamp 100 for battery test and the battery test device 200, and the application will not be repeated.

[0093] As a realizable way, referring to Figure 10 , the method 300 further comprises:

[0094] obtaining the temperature of the surface of the battery 180 to be tested, and if the temperature of the surface of the battery 180 to be tested is greater than a first temperature threshold, controlling the cooling equipment 210 to increase the liquid supply flow rate;

[0095] if the temperature of the surface of the battery 180 to be tested is less than a second temperature threshold, controlling the cooling equipment 210 to decrease the liquid supply flow rate; wherein the first temperature threshold is greater than the second temperature threshold.

[0096] If the temperature of the surface of the battery 180 to be tested is within the range of the first temperature threshold value and the second temperature threshold value, the control cooling device 210 keeps the liquid supply flow rate unchanged.

[0097] Specifically, when the temperature of the surface of the battery 180 obtained by the first temperature sensor 150 is greater than the first temperature threshold value, the test device program controls the cooling device 210 to increase the liquid supply flow rate to rapidly cool and dissipate heat from the battery 180 until the temperature of the surface of the battery 180 monitored by the first temperature sensor 150 is less than or equal to the first temperature threshold value; when the temperature of the surface of the battery 180 obtained by the first temperature sensor 150 is less than the second temperature threshold value, the test device program controls the cooling device 210 to decrease the liquid supply flow rate to gently cool and dissipate heat from the battery 180 until the temperature of the surface of the battery 180 monitored by the first temperature sensor 150 is greater than or equal to the second temperature threshold value, thereby keeping the temperature of the surface of the battery 180 between the first temperature threshold value and the second temperature threshold value, so as to realize temperature control in the fast-charging cycle test process of the battery 180 and improve the fast-charging cycle test performance of the battery 180.

[0098] For example, the temperature control in the cell test process is required to be T±5℃, wherein T is the cell cycle test temperature, and T is between 20-40℃, the first temperature threshold value is T+5℃, and the second temperature threshold value is T-5℃. Those skilled in the art can also set the first temperature threshold value and the second temperature threshold value to other values according to actual needs, which are not particularly limited in the present application.

[0099] In this example, the signal output end of the first temperature sensor 150 is electrically connected with the signal input end of the test device to realize real-time monitoring of the temperature of the surface of the battery 180; the signal output end of the test device is electrically connected with the control end of the cooling device 210 to realize linkage control of the test device and the cooling device 210, thereby realizing temperature control in the fast-charging cycle test process of the battery 180 and improving the fast-charging cycle test performance of the battery 180.

[0100] It should be noted that the temperature of the surface of the battery 180 can be the temperature of the upper surface of the battery 180 or the temperature of the lower surface of the battery 180. For example, the temperature of the upper surface of the battery 180 is , and the temperature of the lower surface of the battery 180 is , if or is greater than the first temperature threshold value T+5℃, wherein and take the higher temperature value, the cooling device 210 increases the liquid supply flow rate; if or is less than the second temperature threshold value T-5℃, wherein and If a lower temperature value is selected, the cooling device 210 will reduce the liquid supply flow rate.

[0101] As one possible implementation, the method 300 further includes:

[0102] S330: Based on the mass of the battery 180 under test The heat generated by the battery under test 180 during cyclic charging and discharging. and the temperature change of the battery under test at 180°C. Determine the specific heat capacity of the battery 180 under test. for: ;

[0103] S340: Based on the mass of the battery 180 under test The specific heat capacity of the battery 180 under test The initial temperature of the battery 180 under test And the highest temperature during the cyclic charge and discharge process. Determine the maximum heat generation of the battery under test 180 during the cyclic charge and discharge process. for: ;

[0104] S350: The maximum heat generation of the battery under test 180 during the cyclic charge and discharge process. The specific gravity of the cooling medium provided by the cooling device 210 and specific heat capacity The temperature difference between the cooling medium in the inlet pipe 211 and the return pipe 212 and the liquid supply time of the cooling device 210. Determine the liquid supply flow rate of the cooling device 210. for: .

[0105] In this example, in S330, the specific heat capacity of battery 180 is determined. The heat generated by battery 180 was obtained through an adiabatic temperature rise experiment. Then, weigh the battery using a balance to determine its mass. The heat generated during a 180V fast charging cycle of the battery is calculated using the following formula. ,in, The specific heat capacity of battery 180 can be determined using the formula above, which represents the change in temperature during a fast charging cycle. .

[0106] In S340, the maximum heat generation of battery 180 under normal testing conditions is determined. The battery 180 is tested by oven for fast charging cycle test, and the initial temperature of the battery 180 is recorded during the test and the maximum temperature during the cycle charging and discharging process , the maximum heat generation of the battery 180 during the cycle charging and discharging process is: .

[0107] In S350, the supply flow rate of the cooling medium in the cooling device 210 is determined According to the cooling capacity calculation formula of the cooling device 210: , wherein represents the load, i.e. the maximum heat generation of the battery 180; represents the specific heat capacity of the cooling medium, such as water, and the specific heat capacity of water is 4.184 J / (kg·℃); represents the specific gravity of the cooling medium, such as the specific gravity of water, which is 1000 Kg / m3; represents the supply flow rate of the cooling medium (such as water flow), with the unit of m³ / h; represents the temperature difference of the cooling medium in the inlet pipe 211 and the return pipe 212, which is set by the cooling device 210, wherein the temperature of the cooling medium in the inlet pipe 211 is obtained by the second temperature sensor 220, and the temperature of the cooling medium in the return pipe 212 is obtained by the third temperature sensor 230; represents the supply time of the cooling device 210, with the unit of hours. According to the conversion of the cooling capacity calculation formula of the cooling device 210, the supply flow rate of the cooling device 210 is: .

[0108] As an implementation manner, the method further comprises:

[0109] Suppose the temperature of the surface of the battery 180 to be tested is , the first temperature threshold is , and the second temperature threshold is ;

[0110] If , the increase of the supply flow rate of the cooling device 210 is ;

[0111] If , the decrease of the supply flow rate of the cooling device 210 is .

[0112] For example, the temperature of the surface of the battery 180 is , for example, the temperature of the upper surface of the battery 180 is , and the temperature of the lower surface of the battery 180 is , if or greater than the first temperature threshold ( e.g. T+5°C), the cooling device 210 increases the liquid supply flow rate by an amount ; wherein the higher of and is taken. greater than , then is equal to . If or less than the second temperature threshold ( e.g. T-5°C), the cooling device 210 decreases the liquid supply flow rate by an amount ; wherein the lower of and is taken.

[0113] The above description is merely exemplary embodiments of the application and the used technical principles. It should be understood by those skilled in the art that the scope of the utility model disclosed in the present application is not limited to the above technical features of the specific combination of the technical solutions, and should also cover other technical solutions formed by any combination of the above technical features or equivalent features without departing from the utility model concept. For example, the above features are replaced with the technical features disclosed in the present application (but not limited to) having similar functions to form technical solutions.

Claims

1. A cooling fixture (100) for battery testing, characterized by The support (140) is connected with a first clamping member (110) and a second clamping member (120), a clamping space is formed between the first clamping member (110) and the second clamping member (120), a battery (180) to be tested is clamped in the clamping space, and at least one of the first clamping member (110) and the second clamping member (120) is a heat conducting member which is in heat exchange cooperation with the battery (180) to be tested to absorb heat from the battery (180) to be tested.

2. The cooling jig (100) for battery testing according to claim 1, characterized in that, Opposite surfaces of the first clamping member (110) and the second clamping member (120) are clamping cooperation surfaces which are shaped according to surfaces of the battery (180) to be tested, and the clamping cooperation surfaces form the clamping space.

3. The cooling jig (100) for battery testing according to claim 2, characterized in that, Opposite surfaces of the first clamping member (110) and the second clamping member (120) are planes which cover at least surfaces of the battery (180) to be tested.

4. The cooling jig (100) for battery testing according to claim 1, characterized by, The heat conducting member is provided with a liquid flow channel (130) in which a cooling medium is introduced, and the cooling medium is used to exchange heat with the battery (180) to be tested through the heat conducting member.

5. The cooling jig (100) for battery testing according to claim 4, characterized in that, The first clamping member (110) and the second clamping member (120) are both heat conducting members, and liquid flow channels (130) of the heat conducting members are connected through an adapter pipe (133).

6. The cooling jig (100) for battery testing according to claim 1, characterized in that, At least one of side walls of the first clamping member (110) and the second clamping member (120) is provided with a groove (112), a heat insulation layer (190) and a first temperature sensor (150) are arranged in the groove (112), the first temperature sensor (150) has a signal acquisition surface which is arranged flush with a clamping cooperation surface of the first clamping member (110) or the second clamping member (120), and the first temperature sensor (150) is used to acquire a surface temperature of the battery (180) to be tested.

7. The cooling jig (100) for battery testing according to claim 1, characterized in that, A first support plate (160) and a second support plate (161) are arranged in sequence on a side of the second clamping member (120) which is away from the first clamping member (110), the first support plate (160) is in sliding connection with the support (140), and the second support plate (161) is in detachable connection with the support (140). A pressure sensor (170) is arranged between the first support plate (160) and the second support plate (161), the pressure sensor (170) has a sensing surface which is in contact cooperation with the first support plate (160), and the pressure sensor (170) is used to acquire a pressure of the battery (180) to be tested based on the sensing surface.

8. The cooling jig (100) for battery testing according to claim 7, characterized in that, The second support plate (161) is provided with a limiting groove (1611). The pressure sensor (170) comprises a base body (171), a pressure sensing body (172) is arranged on the base body (171) in a protruding manner, the pressure sensing body (172) is provided with the pressure sensing surface, the base body (171) is partially assembled into the limiting groove (1611), and the base body (171) is fixedly connected with the second supporting plate (161).

9. The cooling jig (100) for battery testing according to claim 8, characterized in that, The limiting groove (1611) is a square limiting groove, and the corner of the square limiting groove is provided with an avoiding groove (1612) for avoiding the base body (171).

10. The cooling jig (100) for battery testing according to claim 7, characterized in that, The first clamping piece (110) is provided with a third supporting plate (162) on the side away from the second clamping piece (120), and the third supporting plate (162) is slidingly connected with the supporting piece (140).

11. The cooling clamp (100) for battery testing according to any of claims 1-10, characterized in that, The first clamping piece (110) and the second clamping piece (120) are provided with avoiding openings (111) for avoiding the supporting piece (140), the supporting piece (140) sequentially passes through the avoiding openings (111) of the first clamping piece (110) and the second clamping piece (120), and the supporting piece (140) is slidingly connected with the first clamping piece (110) and the second clamping piece (120).

12. A battery testing device (200) characterized by, The battery testing device (200) comprises a cooling device (210) and the cooling clamp (100) for battery testing in any one of claims 1-11, and the cooling device (210) is arranged in communication with the heat conducting piece and used for providing cooling medium into the heat conducting piece.

13. The battery testing device (200) of claim 12, wherein, The heat conducting piece is provided with a liquid flow channel (130), and the liquid flow channel (130) is provided with an inlet (131) and a return port (132); The cooling clamp (100) is provided in plurality, the inlet (131) of each cooling clamp (100) is arranged in communication with the cooling device (210) through an inlet pipe (211), and the return port (132) of each cooling clamp (100) is arranged in communication with the cooling device (210) through a return pipe (212).

14. The battery testing device (200) of claim 13, wherein, The inlet pipe (211) is provided with a second temperature sensor (220), and the second temperature sensor (220) is used for acquiring the temperature of the cooling medium in the inlet pipe (211); The return pipe (212) is provided with a third temperature sensor (230), and the third temperature sensor (230) is used for acquiring the temperature of the cooling medium in the return pipe (212).

15. The battery testing device (200) of claim 14, wherein, The battery testing device (200) further comprises a testing device, the signal output ends of the second temperature sensor (220) and the third temperature sensor (230) are electrically connected with the signal input end of the testing device, and the signal output end of the testing device is electrically connected with the control end of the cooling device (210); The testing device determines the liquid supply flow rate of the cooling device (210) based on the temperature of the cooling medium in the inlet pipe (211) and the temperature of the cooling medium in the return pipe (212).

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