Battery testing device and battery testing method

Abstract

The invention relates to the technical field of batteries, in particular to a battery testing device and a battery testing method. The battery testing device comprises a heating module, a cooling module and a temperature control unit, the heating module and the cooling module are electrically connected with the temperature control unit, the heating module is arranged at the top end of a battery, and the cooling module is arranged at the bottom end of the battery. Wherein the temperature control unit is configured to detect the temperature of the top end of the battery and / or the temperature of the bottom end of the battery, and control the operation condition of the heating module and / or the cooling module according to the detected temperature. Therefore, the battery testing device can simulate the temperature difference formed between the top end and the bottom end of the battery under the liquid cooling heat dissipation condition, so that the experimental research requirement of the battery is met.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery testing device and a battery testing method. Background Art

[0002] As a green and clean energy, lithium batteries are environmentally friendly, highly efficient and rechargeable. They play an extremely important role in the pursuit of lightweight and long-range consumer electronics and the new energy vehicle industry. However, lithium batteries generate a lot of heat during the charging and discharging process, and the accumulation of this heat seriously affects the performance, safety and life of the battery. However, there are currently few designs for battery testing devices, making it difficult to test and study the performance of batteries under specific temperature scenarios. Summary of the invention

[0003] The present application discloses a battery testing device and a battery testing method, which can simulate the temperature difference formed between the top and bottom of the battery under liquid cooling and heat dissipation conditions, thereby meeting the experimental research needs for the battery.

[0004] In order to achieve the above objectives, in a first aspect, the present application discloses a battery testing device, comprising:

[0005] A heating module, wherein the heating module is configured to be disposed on a top end of the battery;

[0006] a cooling module, the cooling module being configured to be disposed at a bottom end of the battery; and

[0007] a temperature control unit, the temperature control unit being electrically connected to the heating module and the cooling module, the temperature control unit being configured to detect a temperature at a top end of the battery and / or a temperature at a bottom end of the battery, and to control an operation of the heating module and / or the cooling module according to the detected temperature;

[0008] Wherein, the top end of the battery is configured as one end having a top cover assembly.

[0009] During the charging and discharging process, the battery will continuously generate heat due to its own internal resistance. Based on this, adding a heat dissipation structure (such as liquid cooling) to the bottom of the battery can effectively achieve the heat dissipation of the bottom of the battery, thereby avoiding the heat of the battery from accumulating at the bottom. However, in this case, the temperature difference between the top of the battery and the bottom of the battery is large, that is, a significant temperature difference will be formed between the top and bottom of the battery. In order to simulate the formation of this temperature difference between the top and bottom of the battery, the battery testing device of the present application sets a heating module at the top of the battery and sets a cooling module at the bottom of the battery, so as to simulate the temperature difference formed between the top and bottom of the battery under liquid cooling, thereby meeting the experimental research needs of the experimenter on the battery. That is, it is easy to simulate the cycle process of the battery and easy to adjust the temperature difference of the battery. In addition, the structure of the battery testing device is simple, which is easy to manufacture on the one hand, and easy to replace the battery on the other hand, which is conducive to improving the convenience of testing the battery performance.

[0010] In some possible implementations, the heating module is configured to be attached to a shell surface of the battery.

[0011] By attaching the heating module to the surface of the battery shell, on the one hand, the heat generated by the heating module can be transferred to the inside of the battery, thereby simulating the actual heating of the battery during the charging and discharging process. On the other hand, the thermal resistance between the heating module and the battery shell is small, which can effectively save energy consumption and thus improve energy utilization. In addition, the heating module is attached to the surface of the battery shell rather than the top cover assembly. This is because the heating of the battery is actually caused by the heating of the battery cells inside the battery during operation. Therefore, arranging the heating module on the surface of the shell can better restore the actual heating position of the battery, thereby effectively making the battery simulate the heating situation during actual operation, which is conducive to improving the test accuracy of the battery testing device.

[0012] In some possible implementations, the heating module is configured to be disposed around the outer circumference of the battery housing.

[0013] Since the heating module is arranged around the periphery of the battery shell, the entire periphery of the battery shell can be heated evenly as a whole, which can avoid or minimize the situation where local heating of the battery occurs and causes the overall performance of the battery to be significantly different from the actual heating situation, thereby improving the test accuracy and reliability of the battery testing device.

[0014] In some possible implementations, the heating module includes a plurality of heating modules, and the plurality of heating modules are sequentially arranged on the shell surface of the battery along the height direction of the battery.

[0015] By arranging multiple heating modules in the height direction of the battery and performing gradient temperature adjustment on the heating modules through a temperature control unit, it is possible to more effectively simulate the gradient change of temperature during the battery charging and discharging process, so that the heating condition of the battery is better close to the actual heating condition of the battery, thereby effectively simulating the heating condition of the battery, which is beneficial to improving the test accuracy and reliability of the battery testing device.

[0016] In some possible implementations, along the height direction of the battery, a distance between the heating module and a top cover assembly of the battery is 3 mm-5 mm.

[0017] Because at this distance, the heating module can be closest to the battery cells inside the battery, that is, the part of the battery that actually generates heat, such a setting can make the heating condition of the battery better close to the actual heating condition of the battery, thereby effectively simulating the heating condition of the battery, which is beneficial to improving the test accuracy and reliability of the battery testing device.

[0018] In some possible implementations, the thickness of the heating module along the first direction is 1 mm-2 mm; and / or the width of the heating module along the second direction is 4 mm-6 mm;

[0019] The second direction is the height direction of the battery, and the first direction intersects with the second direction.

[0020] Such an arrangement can enable the heating module to better control the heat generation and heat generation position of the battery, thereby improving the accuracy of the temperature simulation of the battery, and further improving the reliability of the detection of the battery performance.

[0021] In some possible embodiments, the battery testing device further includes a first thermal insulation member, which is coated on the outside of the battery, and is provided with a first avoidance hole and a second avoidance hole, wherein the first avoidance hole is configured to allow the pole on the top of the battery to pass through, and the second avoidance hole is configured to avoid the heating module.

[0022] The first heat insulating member is wrapped around the outside of the battery, which can keep the battery warm and prevent the temperature loss of the battery, so that the battery testing device can more accurately control the temperature of the battery, and effectively save energy consumption, which is conducive to the long-term stable operation of the battery testing device. In addition, the first heat insulating member is provided with a first avoidance hole for the top pole of the battery to pass through, and a second avoidance hole for avoiding the heating module, so that the first heat insulating member can better fit the battery, achieve a better heat preservation effect for the battery, and effectively improve the test accuracy and reliability of the battery testing device.

[0023] In some possible implementations, the first thermal insulation component includes thermal insulation wool, and the thickness of the thermal insulation wool is 3mm-5mm.

[0024] Such a setting can effectively improve the thermal insulation effect of the battery and improve the reliability of the battery testing device. In addition, since the battery may leak, short-circuit, catch fire, etc. during the battery testing process, the insulation cotton can effectively prevent the experimenters from getting scalded or burned, thereby protecting the battery testing device and experimenters.

[0025] In some possible implementations, the battery testing device further includes a clamping mechanism, wherein the clamping mechanism is configured to clamp on two opposite sides of the battery and clamp the heating module on a housing of the battery to provide a restraining force to the battery.

[0026] In order to achieve long battery life and miniaturized design of the battery module, the cells in the battery module are arranged more compactly. During the long-term cycle charge and discharge process of the battery module, the cells will expand and squeeze the adjacent cells. Based on this, in order to effectively simulate the stress conditions of the battery during the actual cycle, by using a clamping mechanism to clamp the two opposite sides of the battery, the stress environment during the battery cycle expansion process can be effectively simulated, thereby improving the accuracy and authenticity of the battery test. In addition, since the clamping mechanism is clamped on the two opposite sides of the battery and the heating module is arranged on the shell surface of the battery, the clamping mechanism can clamp the two opposite sides of the battery to provide a restraining force thereto, and can also clamp the heating module on the battery shell to achieve the function of fixing the heating module.

[0027] In some possible implementations, the battery testing device further includes a second thermal insulation member, and the second thermal insulation member is coated on an outer peripheral surface of the battery, so that the clamping mechanism is coated between the first thermal insulation member and the second thermal insulation member.

[0028] The battery, the first thermal insulation member, the heating module and the clamping mechanism are integrally covered by the second thermal insulation member. On the one hand, the second thermal insulation member can keep the battery warm and insulate it, thereby effectively improving the test stability and energy utilization rate of the battery testing device. On the other hand, the clamping mechanism is arranged between the first thermal insulation member and the second thermal insulation member, which can not only effectively keep the battery warm, but also ensure that the restraining force provided by the clamping mechanism on the battery can be effectively applied to the battery without being hindered by the second thermal insulation member, thereby effectively improving the test accuracy of the battery testing device.

[0029] In some possible implementations, the temperature control unit includes:

[0030] a plurality of temperature sensing modules, wherein one of the temperature sensing modules is configured to be disposed adjacent to the top of the battery to detect the temperature of the top of the battery, and another of the temperature sensing modules is configured to be disposed at the bottom of the battery to detect the temperature of the bottom of the battery; and,

[0031] A control module, wherein the control module is electrically connected to the temperature sensing module, the heating module and the cooling module, and the control module is configured to control the operation of the heating module and / or the cooling module according to the temperature detected by each of the temperature sensing modules.

[0032] The top and bottom temperatures of the battery are measured respectively by multiple temperature sensing modules, so that the control module can control the heating and / or cooling of the heating module and / or cooling module respectively according to the temperature of the top and bottom of the battery, thereby effectively regulating the temperature of the top and bottom of the battery, simulating the actual operation of the battery under bottom liquid cooling conditions, and facilitating experimenters to conduct experiments thereon.

[0033] In some possible implementations, the temperature sensing module includes a temperature sensing wire, and the temperature sensing wire is disposed inside the battery housing.

[0034] Specifically, the temperature sensing wire is built into the battery cell, which can monitor the temperature change of the battery in real time, and the temperature change of the battery cell is measured more accurately, which can provide accurate data support for the battery testing device, thereby helping to optimize the test accuracy and reliability of the battery testing device. In addition, the temperature sensing wire is small in size and can be well adapted to smaller batteries, so that the temperature measurement of the battery will not affect the battery's own structure, ensuring the normal operation of the battery, thereby improving the accuracy of the battery test.

[0035] In some possible implementations, the battery testing device further includes a voltage stabilizing unit, and the voltage stabilizing unit is configured to be electrically connected to the heating module and the cooling module.

[0036] Since the battery testing device requires relatively accurate and stable temperature control, a voltage stabilizing unit is added to be electrically connected to the heating module and the cooling module. The voltage stabilizing unit then regulates the voltage output by the control module to output a stable and accurate voltage to the heating module and the cooling module, so that the heating module and the cooling module can output a stable voltage, ensuring the accuracy of the temperature control of the battery, thereby improving the reliability and test accuracy of the battery testing device.

[0037] In some possible implementations, the cooling module includes a refrigeration element, the refrigeration element has a cold end and a hot end along a thickness direction thereof, and the cold end is attached to a bottom end surface of the battery.

[0038] In order to effectively simulate the actual operation of the battery under liquid cooling conditions, the cold end of the refrigeration component is attached to the bottom end surface of the battery, which can restore the temperature conditions of the battery during use to a greater extent and ensure the test accuracy and reliability of the battery testing device.

[0039] In some possible implementations, the cooling module further includes a heat sink connected to the hot end.

[0040] It can be understood that the loose parts are connected to the hot end, and the heat sink can effectively dissipate the heat released by the refrigeration component, so that the heat released by the refrigeration component will not accumulate at the bottom of the battery, thereby improving the effective temperature control of the battery testing device.

[0041] In a second aspect, the present application further includes a battery testing method, wherein the battery testing device adopts the battery testing device as described in the first aspect above, and the testing method includes:

[0042] Providing a heating module, and arranging the heating module on the top of the battery;

[0043] Providing a cooling module, and arranging the cooling module at the bottom end of the battery;

[0044] Providing a temperature control unit, and electrically connecting the temperature control unit to the heating module and the cooling module;

[0045] The temperature control unit detects the temperature of the top end of the battery and / or the temperature of the bottom end of the battery, and controls the operation of the heating module and / or the cooling module according to the detected temperature.

[0046] It can be seen that the battery testing method provided in the present application, by setting the heating module at the top of the battery, setting the cooling module at the bottom of the battery, and detecting the top temperature and the bottom temperature of the battery through the temperature control unit, and controlling the operation of the heating module and / or the cooling module according to the detected temperature, so that the battery testing device can simulate the temperature difference formed between the top and the bottom of the battery under liquid cooling, thereby meeting the experimental research needs of the experimenters on the battery, facilitating the simulation process of the battery, and easily adjusting the temperature difference of the battery.

[0047] Compared with the prior art, the beneficial effects of this application are:

[0048] The battery testing device and the battery testing method disclosed in the present application include a heating module, a cooling module and a temperature control unit. The heating module and the cooling module are electrically connected to the temperature control unit. The heating module is arranged on the battery and is arranged near the top of the battery, and the cooling module is arranged at the bottom of the battery. The temperature control unit is configured to detect the temperature of the top of the battery and / or the temperature of the bottom of the battery, and control the operation of the heating module and / or the cooling module according to the detected temperature. In order to simulate the formation of such a temperature difference between the top and the bottom of the battery, the battery testing device of the present application can simulate the temperature difference formed between the top and the bottom of the battery under liquid cooling conditions by setting the heating module at the top of the battery and the cooling module at the bottom of the battery, thereby meeting the experimental research needs of the experimenters on the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0050] Figure 1 It is a schematic diagram of the structure of a battery in the related art;

[0051] Figure 2A A schematic diagram of the structure of a battery testing device provided in an embodiment of the present application;

[0052] Figure 2B A structural block diagram of a battery testing device provided in an embodiment of the present application;

[0053] Figure 3 A cross-sectional view of a battery testing device provided in an embodiment of the present application;

[0054] Figure 4A A schematic diagram of the structure of a heating module, a cooling module and a battery provided in an embodiment of the present application;

[0055] Figure 4B Another structural schematic diagram of a heating module, a cooling module and a battery provided in an embodiment of the present application;

[0056] Figure 5 A side view of a heating module, a cooling module and a battery provided in an embodiment of the present application;

[0057] Figure 6 A flowchart of a battery testing method provided in an embodiment of the present application.

[0058] Description of reference numerals:

[0059] 100-battery testing device; 10-heating module;

[0060] 20-cooling module; 21-refrigeration element; 211-cold end; 212-hot end; 22-heat dissipation element;

[0061] 30-temperature control unit; 31-temperature sensor module; 32-control module;

[0062] 40-first heat insulating member; 41-first avoidance hole; 42-second avoidance hole;

[0063] 50-clamping mechanism; 501-clamping member; 60-second thermal insulation member; 70-voltage stabilizing unit;

[0064] 200-battery; 201-top; 202-bottom; 203-top cover assembly; 204-housing; 2041-surface; 205-pole;

[0065] F1-first direction; F2-second direction. DETAILED DESCRIPTION

[0066] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0067] In this application, the terms "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0068] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0069] In addition, the terms "disposed", "provided with", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0070] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0071] As an important part of the new energy field, the performance improvement and safety assurance of energy storage lithium-ion batteries have always been the focus of the industry. With the continuous advancement of technology, lithium-ion batteries are developing towards higher energy density, longer cycle life, lighter and thinner, and higher safety. The realization of these goals not only requires innovation in battery materials and structures, but also poses higher challenges to its thermal management capabilities.

[0072] While improving battery performance, the thermal management problem of batteries has become increasingly prominent. Although multi-series and multi-parallel battery modules can increase battery capacity and support longer product operation, the thermal coupling effect between battery cells will also be aggravated, making the heat dissipation problem more complicated. In addition, in order to meet the needs of fast charging, the battery needs to withstand a large rate of charging current, which further aggravates the heating problem of the battery. The abnormal increase in the center temperature of the battery will not only affect the electrochemical performance of the battery, but may also cause safety problems such as battery short circuit, thermal runaway and even fire.

[0073] In order to meet these challenges, air cooling, liquid cooling and phase change cooling are currently used to dissipate heat in battery packs. Although air cooling is simple and easy, it is limited by the low heat exchange coefficient between the battery and the air, and the heat dissipation effect is not ideal. At the same time, air cooling can easily cause dew accumulation inside the battery pack, posing a threat to the safety of the battery system. Phase change cooling uses the property of materials to absorb or release heat during the phase change process to achieve cooling or heating of the battery. Although phase change cooling has a good heat dissipation effect, the technology is still in the development stage and has problems such as complex structure, high cost, and difficult maintenance.

[0074] In contrast, liquid cooling has been widely used in the field of energy storage due to its efficient and stable heat dissipation performance. Liquid cooling mainly uses high thermal conductivity liquids (such as water, ethylene glycol, etc.) to directly or indirectly contact the battery to remove heat. Among them, arranging a jacket around the battery module or setting a heat transfer tube between the modules is the main way of liquid cooling. In the liquid cooling system of energy storage lithium-ion batteries, bottom liquid cooling is mostly used. However, due to the design limitations of the energy storage battery cell shell, the bottom cooling method will cause a large temperature difference between the top and bottom of the battery cell. This temperature difference will not only affect the energy efficiency and life of the battery cell, but may also cause uneven thermal stress inside the battery pack, resulting in battery performance degradation or even damage.

[0075] The specific impact of the temperature difference between the top and bottom of the battery cell on the energy efficiency and life of the battery cell currently still mainly relies on simulation analysis and lacks the support of actual measurement data. There are still many unknowns and uncertainties about the relationship between the temperature difference between the top and bottom of the battery and the battery performance.

[0076] In view of this, a battery testing device and a battery testing method disclosed in the present application can simulate the temperature difference between the top and bottom ends of the battery under liquid cooling conditions, thereby meeting the experimental research needs of the battery.

[0077] The technical solution of the present application will be further described below in conjunction with embodiments and drawings.

[0078] Before introducing and illustrating the structure of the battery testing device 100 of the present application, the structure of the battery 200 involved in the present application (ie, the battery 200 mentioned later) is briefly introduced.

[0079] It is understandable that the battery testing device 100 of the present application can be used to test cylindrical batteries, and of course can also be used to test square batteries.

[0080] Take the square battery as an example. Figure 1 As shown, the square battery 200 may include a battery cell (not shown), a top cover assembly 203 and a shell 204. The shell 204 is connected to the top cover assembly 203 to form an internal space of the square battery (not shown). The battery cell is arranged in the internal space. The top cover assembly 203 is also provided with a pole 205, and the pole 205 is electrically connected to the battery cell.

[0081] Please also read Figure 1-4A ,in, Figure 1 is a schematic diagram of the structure of a battery in the related art, Figure 2A A schematic diagram of the structure of a battery testing device provided in an embodiment of the present application. Figure 2B This is a structural block diagram of a battery testing device provided in an embodiment of the present application. Figure 3 A cross-sectional view of a battery testing device provided in an embodiment of the present application, Figure 4AA schematic diagram of the structure of a heating module, a cooling module and a battery provided in an embodiment of the present application. In the first aspect, an embodiment of the present application discloses a battery testing device 100, including a heating module 10, a cooling module 20 and a temperature control unit 30, wherein the heating module 10 is configured to be arranged at the top end 201 of the battery 200, the cooling module 20 is configured to be arranged at the bottom end 202 of the battery 200, and the temperature control unit 30 is electrically connected to the heating module 10 and the cooling module 20. The temperature control unit 30 is configured to detect the temperature of the top end 201 of the battery 200 and / or the temperature of the bottom end 202 of the battery 200, and control the operation of the heating module 10 and / or the cooling module 20 according to the detected temperature. Among them, the top end 201 of the battery 200 is configured to have one end of a top cover assembly 203.

[0082] During the charging and discharging process, the battery 200 will continuously generate heat due to its own internal resistance. Based on this, adding a heat dissipation structure (such as liquid cooling) to the bottom of the battery 200 can effectively achieve the heat dissipation of the bottom of the battery, thereby avoiding the heat of the battery 200 from accumulating at the bottom. However, in this case, the temperature difference between the top 201 of the battery 200 and the bottom 202 of the battery 200 is large, that is, a significant temperature difference will be formed between the top 201 and the bottom 202 of the battery 200. In order to simulate the formation of this temperature difference between the top 201 and the bottom 202 of the battery 200, the battery testing device 100 of the present application is provided with a heating module 10 at the top 201 of the battery 200 and a cooling module 20 at the bottom 202 of the battery 200, so as to simulate the temperature difference formed between the top 201 and the bottom 202 of the battery 200 under liquid cooling, thereby meeting the experimental research needs of the experimenter on the battery 200. That is, it is easy to simulate the temperature environment of the battery 200 during the cycle process, and it is easy to adjust the temperature difference of the battery 200. In addition, the battery testing device 100 has a simple structure, which is easy to manufacture on the one hand, and can also facilitate the replacement of the battery 200 on the other hand, thereby facilitating the testing of the battery 200 performance.

[0083] It can be understood that when the battery testing device 100 of the present application is used to test the temperature difference of the battery 200, the battery testing device 100 can be placed in a constant temperature box for testing, so as to keep the testing process of the battery 200 in a constant and stable temperature environment, which provides basic conditions for the stable operation of the battery testing device 100, makes the test results of the battery 200 accurate and reliable, and is conducive to improving the test accuracy of the battery 200.

[0084] As can be seen from the foregoing, the battery 200 can be a square battery. For example, when the battery 200 is a square battery, the top 201 of the battery 200 can refer to one end of the battery 200 having a top cover assembly 203, and the top cover assembly 203 of the battery 200 can include a pole 205. At this time, the top cover assembly 203 of the battery 200 can adopt, for example, a square top cover assembly 203, and the shell 204 of the battery 200 can adopt a square shell 204 that is compatible with the square top cover assembly 203.

[0085] It is understood that the “top end 201” mentioned in the present application refers to a portion of the area or a range near the top of the battery 200; and the “bottom end 202” refers to a portion of the area or a range near the bottom of the battery 200. That is, when the battery 200 includes a housing 204, the top end 201 may be the top end 201 of the housing 204, and the bottom end 202 may be the bottom end 202 of the housing 204.

[0086] Please also read Figures 3 to 4B ,in, Figure 4B Another structural schematic diagram of the heating module, cooling module and battery provided in the embodiment of the present application. In some embodiments, the heating module 10 is configured to be attached to the surface of the housing 204 of the battery 200. By attaching the heating module 10 to the surface of the housing 204 of the battery 200, on the one hand, the heat generated by the heating module 10 can be transferred to the inside of the battery 200, thereby simulating the actual heating of the battery 200 during the charging and discharging process. On the other hand, the thermal resistance between the heating module 10 and the battery housing 204 is small, which can effectively save energy consumption and thus improve energy utilization. In addition, the heating module 10 is attached to the surface of the housing 204 of the battery 200, rather than on the top cover assembly 203, because the heating of the battery 200 is actually caused by the heating of the battery cell inside the battery 200 during operation. Therefore, the heating module 10 is arranged on the surface of the housing 204, which can better restore the actual heating position of the battery 200, thereby effectively simulating the heating situation of the battery 200 during the actual operation, which is conducive to improving the test accuracy of the battery testing device 100.

[0087] Optionally, the heating module 10 is configured to be disposed around the periphery of the shell 204 of the battery 200. Since the heating module 10 is disposed around the periphery of the shell 204 of the battery 200, the entire periphery of the shell 204 of the battery 200 can be heated uniformly as a whole, and the situation that the overall performance of the battery 200 is greatly different from the actual heating situation due to the heating of a local position of the battery 200 can be avoided or minimized, thereby improving the test accuracy and reliability of the battery testing device 100.

[0088] Optionally, the heating module 10 may include but is not limited to a heating strip, a heating wire, a heating block, etc., which is not limited in the embodiment of the present application.

[0089] Optionally, the heating module 10 may use the principle of resistance heating, for example, to achieve the heating effect on the battery 200. Resistance heating can regulate the heat generation by controlling the current size and time length, thereby accurately regulating the heating degree of the battery 200, which is conducive to simulating the heating condition of the battery 200. Of course, as other examples, the heating module 10 may also use the electromagnetic induction heating principle, infrared heating principle, etc., to achieve the heating of the battery 200.

[0090] Optionally, the heating module 10 may be bonded to the housing 204 of the battery 200. For example, the heating module 10 may be bonded by glue or adhesive, which is not specifically limited in this embodiment.

[0091] Optionally, one or more heating modules 10 may be provided along the height direction of the battery 200 .

[0092] See also Figure 5 ,in, Figure 5 A side view of a heating module, a cooling module, and a battery provided in an embodiment of the present application. In some examples, the heating module may be set to one along the height direction of the battery. Along the height direction of the battery 200, the spacing between the heating module 10 and the top cover assembly 203 of the battery 200 is 3mm-5mm. For example, the spacing D between the heating module 10 and the top cover assembly 203 of the battery 200 may include but is not limited to 3.0mm-3.5mm, 3.5mm-4.0mm, 4.0mm-4.5mm, 4.5mm-5.0mm, etc. Exemplarily, the spacing D between the heating module 10 and the top cover assembly 203 of the battery 200 may include but is not limited to 3.0mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4.0mm, 4.1mm, 4.2mm, 4.3mm, 4.4mm, 4.5mm, 4.6mm, 4.7mm, 4.8mm, 4.9mm, 5.0mm, etc., and the embodiments of the present application are not specifically limited to this.

[0093] Because at this distance D, the heating module 10 can be closest to the battery cells inside the battery 200, that is, the part of the battery that actually generates heat, such a setting can make the heating condition of the battery 200 better close to the actual heating condition of the battery 200, thereby effectively simulating the heating condition of the battery 200, which is beneficial to improving the testing accuracy and reliability of the battery testing device 100.

[0094] When the distance D between the heating module 10 and the top cover assembly 203 of the battery 200 is less than 3 mm, the heating module 10 deviates from the actual heating position of the battery 200, resulting in poor simulation effect of the battery 200 and difficulty in simulating the actual operation of the battery 200.

[0095] When the distance D between the heating module 10 and the top cover assembly 203 of the battery 200 is greater than 5 mm, the heating module 10 also deviates from the actual heating position of the battery and is away from the heating position of the top 201 of the battery 200, which not only makes the simulation of the battery 200 inaccurate, but also affects the temperature of the bottom 202 of the battery, thereby affecting the overall temperature of the battery, resulting in inaccurate simulation of the battery 200 by the battery testing device 100.

[0096] For other examples, see again Figure 4B In some embodiments, the heating module 10 includes a plurality of heating modules 10 , and the plurality of heating modules 10 are sequentially arranged on the surface of the shell 204 of the battery 200 along the height direction of the battery 200 .

[0097] By respectively arranging a plurality of heating modules 10 in the height direction of the battery 200 and performing gradient temperature adjustment on the heating modules 10 through the temperature control unit 30, it is possible to more effectively simulate that the temperature of the battery 200 changes in a gradient during the charging and discharging process, so that the heating condition of the battery 200 is closer to the actual heating condition of the battery, thereby effectively simulating the heating condition of the battery 200, which is conducive to improving the test accuracy and reliability of the battery testing device 100. In other words, each heating module 10 can be controlled individually, that is, multiple temperature control units 30 can be set, and one temperature control unit 30 can control one heating module 10, or multiple heating modules 10 can also be controlled.

[0098] In some embodiments, the thickness L1 of the heating module 10 along the first direction F1 is 1 mm-2 mm, wherein the first direction F1 intersects with the height direction of the battery 200. For example, the thickness of the heating module 10 along the first direction F1 may include but is not limited to 1.0 mm-1.2 mm, 1.2 mm-1.4 mm, 1.4 mm-1.6 mm, 1.6 mm-1.8 mm, 1.8 mm-2.0 mm, etc. Exemplarily, the thickness of the heating module 10 along the first direction F1 may include but is not limited to 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, etc., which is not limited in the embodiments of the present application.

[0099] When the thickness L1 of the heating module 10 along the first direction F1 is less than 1 mm, the heat generated by the heating module 10 is difficult to meet the temperature required by the battery testing device; when the thickness L1 of the heating module 10 along the first direction F1 is greater than 3 mm, the heat generated by the heating module 10 is too large and it is difficult to accurately control its heating power.

[0100] In some embodiments, the width L2 of the heating module 10 along the second direction F2 is 4 mm-6 mm, wherein the second direction F2 is the height direction of the battery 200. For example, the width of the heating module 10 along the second direction F2 may include but is not limited to 4.0 mm-4.2 mm, 4.2 mm-4.4 mm, 4.4 mm-4.6 mm, 4.6 mm-4.8 mm, 4.8 mm-5.0 mm, 5.0 mm-5.2 mm, 5.2 mm-5.4 mm, 5.4 mm-5.6 mm, 5.6 mm-5.8 mm, 5.8 mm-6.0 mm, etc. Exemplarily, the width of the heating module 10 along the second direction F2 may include but is not limited to 4.0mm, 4.1mm, 4.2mm, 4.3mm, 4.4mm, 4.5mm, 4.6mm, 4.7mm, 4.8mm, 4.9mm, 5.0mm, 5.1mm, 5.2mm, 5.3mm, 5.4mm, 5.5mm, 5.6mm, 5.7mm, 5.8mm, 5.9mm, 6.0mm, etc., which is not specifically limited to the embodiments of the present application.

[0101] When the width L2 of the heating module 10 along the second direction F2 is less than 4 mm, it is difficult for the heating module 10 to cover the heating position of the battery 200, resulting in inaccurate temperature simulation of the battery 200; when the width L2 of the heating module 10 along the second direction F2 is greater than 6 mm, the coverage area of ​​the heating module 10 on the battery 200 is too large, which also results in inaccurate temperature simulation of the battery 200, thereby resulting in poor testing accuracy of the battery testing device 100.

[0102] Such an arrangement allows the heating module 10 to better control the heat generation and heat generation position of the battery 200 , thereby improving the accuracy of the temperature simulation of the battery 200 , and further improving the reliability of the detection of the performance of the battery 200 .

[0103] When the heating module 10 meets the above-mentioned width and / or thickness ranges, the heating module 10 is in the shape of a long strip. When the battery 200 is a square battery, the thickness direction of the heating module 10 corresponds to the thickness direction of the battery 200, and the width direction of the heating module 10 corresponds to the height direction of the battery 200; when the battery 200 is a cylindrical battery, the thickness direction of the heating module 10 corresponds to the radial direction of the battery 200, and the width direction of the heating module 10 corresponds to the height direction of the battery 200. That is, the second direction F2 of the present application is the height direction of the battery 200, and the first direction F1 intersects with the second direction F2, so that the heating module 10 is attached to the surface of the shell 204 of the battery 200.

[0104] Please also read Figures 1 to 4A In some embodiments, the battery testing device 100 further includes a first heat insulating member 40, which is coated on the outside of the battery 200. The first heat insulating member 40 is provided with a first avoidance hole 41 and a second avoidance hole 42. The first avoidance hole 41 is configured to allow the pole 205 on the top 201 of the battery 200 to pass through, and the second avoidance hole 42 is configured to avoid the heating module 10. The first heat insulating member 40 is coated on the outside of the battery 200, which can keep the battery 200 warm and prevent the temperature of the battery 200 from being lost, so that the battery testing device 100 can more accurately control the temperature of the battery 200, and effectively save energy consumption, which is conducive to the long-term stable operation of the battery testing device 100. In addition, the first heat insulating member 40 is provided with a first avoidance hole 41 for the pole 205 of the top 201 of the battery 200 to pass through, and a second avoidance hole 42 for avoiding the heating module 10, so that the first heat insulating member 40 and the heating module 10 can better fit the battery 200, achieve a better heat preservation effect for the battery 200, effectively improve the test accuracy and reliability of the battery testing device 100, and effectively reduce energy consumption. At the same time, the first avoidance hole 41 is provided for the pole 205 on the top 201 of the battery 200 to pass through, which can facilitate the subsequent charge and discharge test of the battery 200.

[0105] It can be understood that the first thermal insulation member 40 is covered on the outside of the battery 200, that is, the first thermal insulation member 40 can be covered on the top cover assembly 203 of the battery 200 and the outer peripheral surface of the shell 204, wherein the outer peripheral surface of the shell 204 can include the side wall surface of the shell 204.

[0106] It is understandable that when the first thermal insulation member 40 is coated on the outside of the battery 200, it can be a single-layer coating or a multi-layer coating, which is not specifically limited in this embodiment.

[0107] Optionally, the first thermal insulation member 40 may include thermal insulation cotton, and the thickness of the thermal insulation cotton may be 3mm-5mm. For example, the thickness of the thermal insulation cotton may include but is not limited to 3.0mm-3.2mm, 3.2mm-3.4mm, 3.4mm-3.6mm, 3.6mm-3.8mm, 3.8mm-4.0mm, 4.0mm-4.2mm, 4.2mm-4.3mm, 4.4mm-4.6mm, 4.6mm-4.8mm, 4.8mm-5.0mm, etc. Exemplarily, the thickness of the insulation cotton may include but is not limited to 3.0mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4.0mm, 4.1mm, 4.2mm, 4.3mm, 4.4mm, 4.5mm, 4.6mm, 4.7mm, 4.8mm, 4.9mm, 5.0mm, etc., and the embodiment of the present application does not specifically limit this.

[0108] Such a configuration can effectively improve the thermal insulation effect of the battery 200 and improve the reliability of the battery testing device 100. In addition, since the battery 200 may leak, short-circuit, catch fire, etc. during the battery testing process, the thermal insulation cotton can effectively prevent the experimenters from getting scalded or burned, thereby protecting the battery testing device 100 and the experimenters.

[0109] It is understandable that the material of the thermal insulation wool may include but is not limited to glass fiber, rock wool, rubber and plastic thermal insulation wool, polyurethane foam and calcium silicate board, etc., and the embodiments of the present application are not limited to this.

[0110] See also Figure 3 Optionally, the battery testing device 100 also includes a clamping mechanism 50, which is configured to clamp on two opposite sides of the battery 200, and clamp the heating module 10 on the housing 204 of the battery 200 to provide a restraining force to the battery 200. Considering the application scenarios of square batteries, multiple square batteries are usually connected in series and / or in parallel to form a battery module. In order to achieve long battery life and miniaturized design of the battery module, the battery cells in the battery module are arranged more compactly. During the long-term cycle charge and discharge process of the battery module, the battery will expand and squeeze the adjacent batteries. In order to effectively simulate the stress conditions of the battery 200 during the actual cycle process, by using the clamping mechanism 50 to clamp the two opposite sides of the battery 200, the stress environment during the battery cycle expansion process can be effectively simulated, thereby improving the accuracy and authenticity of the battery test.

[0111] In addition, since the clamping mechanism 50 is clamped on two opposite sides of the battery 200 and the heating module 10 is arranged on the surface of the shell 204 of the battery 200, the clamping mechanism 50 can clamp the two opposite sides of the battery 200 to provide a restraining force thereto, while clamping the heating module 10 on the shell 204 of the battery 200 to fix the heating module 10.

[0112] Optionally, since the arrangement of the battery 200 in the battery module is the large surface of the battery 200 (that is, the surface of the battery 200 along the thickness direction, see Figure 1 The surface 2041 of the battery 200 is arranged longitudinally relative to the large surface of the battery, so the force applied to the battery during the cycle expansion process is also applied to the large surface of the battery. Therefore, the clamping mechanism 50 is used to clamp the large surface of the battery 200, thereby effectively simulating the actual force applied to the battery and effectively improving the accuracy of the battery test.

[0113] Optionally, the clamping mechanism 50 may include two clamping components 501 disposed at a relative interval, the two clamping components 501 may be threadedly connected together by a bolt (not shown), the two clamping components 501 are correspondingly clamped on two opposite surfaces of the battery 200 along the thickness direction, and the interval between the two clamping components 501 is adjusted by the bolt to provide a restraining force to the battery 200. Specifically, the clamping component 501 may include a clamping plate, whereby the clamping plate can be arranged to fit the large surface of the battery 200 more closely.

[0114] See also Figure 5 In some embodiments, the battery testing device 100 further includes a second thermal insulation member 60, which is coated on the outer peripheral surface of the battery 200, so that the clamping mechanism 50 is coated between the first thermal insulation member 40 and the second thermal insulation member 60. The battery 200, the first thermal insulation member 40, the heating module 10 and the clamping mechanism 50 are integrally coated by the second thermal insulation member 60. On the one hand, the second thermal insulation member 60 can play a role in heat preservation and heat insulation for the battery 200, thereby effectively improving the test stability and energy consumption utilization rate of the battery testing device 100; on the other hand, the clamping mechanism 50 is arranged between the first thermal insulation member 40 and the second thermal insulation member 60, which can not only play an effective role in heat preservation for the battery 200, but also ensure that the restraining force provided by the clamping mechanism 50 on the battery 200 can be effectively applied to the battery 200 without being hindered by the second thermal insulation member 60, thereby effectively improving the test accuracy of the battery testing device 100.

[0115] Since the second thermal insulation member 60 does not affect the force applied by the clamping mechanism 50 to the battery 200, the thickness of the second thermal insulation member 60 can be increased to achieve a better heat preservation effect. Specifically, the second thermal insulation member 60 may include thermal insulation cotton, and the thickness of the thermal insulation cotton is 9mm-15mm. For example, the thickness of the thermal insulation cotton may include but is not limited to 9mm-10mm, 10mm-11mm, 11mm-12mm, 12mm-13mm, 13mm-14mm, 14mm-15mm, etc. Exemplarily, the thickness of the thermal insulation cotton may include but is not limited to 9mm, 9.5mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm, 13mm, 13.5mm, 14mm, 14.5mm, 15mm, etc., and the embodiments of the present application are not specifically limited to this.

[0116] With such a configuration, the second thermal insulation member 60 can achieve effective thermal insulation and heat preservation for the battery 200 without hindering the clamping mechanism 50 from providing sufficient restraining force on the battery 200, thereby restoring the actual temperature conditions during the battery cycle to the greatest extent and effectively improving the test accuracy of the battery testing device 100.

[0117] It is understandable that the second heat insulating member 60 may be coated on the outer peripheral surface of the battery 200 in a single layer or in multiple layers, which is not specifically limited in this embodiment. The outer peripheral surface of the shell 204 may include the side wall surface of the shell 204 of the battery 200 .

[0118] See also Figure 2B In some embodiments, the temperature control unit 30 includes a plurality of temperature sensing modules 31 and a control module 32, wherein one temperature sensing module 31 is configured to be disposed adjacent to the top 201 of the battery 200 to detect the temperature of the top 201 of the battery 200, and another temperature sensing module 31 is configured to be disposed at the bottom 202 of the battery 200 to detect the temperature of the bottom 202 of the battery 200. The control module 32 is electrically connected to the temperature sensing module 31, the heating module 10, and the cooling module 20, and the control module 32 is configured to control the operation of the heating module 10 and / or the cooling module 20 according to the temperature detected by each temperature sensing module 31.

[0119] Since the temperatures of the top end 201 and the bottom end 202 of the battery 200 are inconsistent and the temperatures of the two ends need to be precisely controlled, the present application sets up multiple temperature sensing modules 31 to measure the temperature of the top end 201 and the bottom end 202 of the battery 200, so that the control module 32 can control the heating and / or cooling of the heating module 10 and / or the cooling module 20 according to the temperature of the top end 201 and the bottom end 202 of the battery 200, thereby effectively controlling the temperature of the top end 201 and the bottom end 202 of the battery 200, simulating the actual operation of the battery under bottom liquid cooling conditions, and facilitating experimenters to conduct experiments and research on it.

[0120] For example, take the temperature sensing modules 31 as two, one of which is connected to the top 201 of the battery 200 for measuring the temperature of the top 201 of the battery 200, and the other is connected to the bottom 202 of the battery 200 for measuring the temperature of the bottom 202 of the battery 200. Exemplarily, the two temperature sensing modules 31 monitor the corresponding temperatures at both ends of the battery 200 in real time. When the temperature of the top 201 of the battery 200 is less than 5°C, the control module 32 controls the heating module 10 to start and heat the top 201 of the battery 200 so that the temperature of the top 201 of the battery 200 reaches 5°C. When the temperature of the bottom 202 of the battery 200 is greater than 0°C, the control module 32 controls the cooling module 20 to start and heat the bottom 202 of the battery 200 so that the temperature of the bottom 202 of the battery 200 reaches 0°C, thereby maintaining a certain temperature difference between the top 201 and the bottom 202 of the battery 200 to simulate the heating of the actual battery during the charging and discharging process.

[0121] Optionally, the temperature sensing module 31 includes a temperature sensing wire, which is arranged inside the housing 204 of the battery 200. Specifically, the temperature sensing wire is built into the battery 200 (that is, the temperature sensing wire is arranged at the battery cell), and can monitor the temperature change of the battery 200 in real time, and the measurement of the temperature change of the battery 200 is relatively accurate, which can provide accurate data support for the battery testing device 100, thereby helping to optimize the test accuracy and reliability of the battery testing device 100. In addition, the size of the temperature sensing wire is small, and it can also be well adapted to batteries with smaller volumes, so that the temperature measurement of the battery 200 will not affect the structure of the battery 200 itself, ensuring the normal operation of the battery 200, thereby improving the accuracy of the test of the battery 200.

[0122] Specifically, the material of the temperature sensing wire may include, but is not limited to, platinum, copper, iron, nickel, silver, tin and other metals or their alloys, which are not specifically limited in the embodiments of the present application.

[0123] Optionally, the control module 32 may include a circuit board, which is electrically connected to the voltage stabilizing unit 70, the temperature sensing module 31, the heating module 10, and the cooling module 20. The circuit board may be a control board or an industrial computer, which is not limited in the present embodiment.

[0124] In some embodiments, the battery testing device 100 further includes a voltage stabilizing unit 70, which is configured to be electrically connected to the heating module 10 and the cooling module 20. Since the battery testing device 100 requires relatively accurate and stable temperature control, the voltage stabilizing unit 70 is electrically connected to the heating module 10 and the cooling module 20 by adding the voltage stabilizing unit 70, and the voltage stabilizing unit 70 then regulates the voltage output by the control module 32 to output a stable and accurate voltage to the heating module 10 and the cooling module 20, so that the heating module 10 and the cooling module 20 can output a stable voltage, ensuring the accuracy of the temperature control of the battery 200, thereby improving the reliability and test accuracy of the battery testing device 100.

[0125] See also Figure 4A In some embodiments, the cooling module 20 may be a liquid cooling module or a semiconductor cooling module. Taking the semiconductor cooling module as an example, the cooling module 20 may include a cooling element 21, and the cooling element 21 has a cold end 211 and a hot end 212 along its thickness direction, and the cold end 211 is attached to the end surface of the bottom end 202 of the battery 200. In order to effectively simulate the actual operation of the battery under liquid cooling and heat dissipation conditions, the cold end 211 of the cooling element 21 is attached to the end surface of the bottom end 202 of the battery 200, which can restore the temperature conditions of the battery during use to a greater extent, and ensure the test accuracy and reliability of the battery testing device 100.

[0126] It is understandable that the cooling element 21 may include a semiconductor cooling sheet, which can enable the two ends of the galvanic couple to form a cold end 211 that absorbs heat and a hot end 212 that releases heat when direct current passes through a galvanic couple formed by two different semiconductor materials in series. Therefore, when the end face of the bottom end 202 of the battery 200 is connected to the cold end 211, the bottom end 202 of the battery 200 can be effectively cooled.

[0127] Optionally, the cooling module 20 further includes a heat sink 22, and the heat sink 22 is connected to the hot end 212. It is understandable that the heat sink 22 is connected to the hot end 212, and the heat sink 22 can effectively dissipate the heat released by the cooling element 21, so that the heat released by the cooling element 21 will not accumulate at the bottom end 202 of the battery 200, thereby improving the effective temperature control of the battery testing device 100.

[0128] Optionally, the heat sink 22 may include a fan, whose air inlet surface is connected to the hot end 212 of the cooling element 21, and whose air outlet surface is arranged away from the hot end 212, thereby sucking in the hot air flow generated by the hot end 212 from the air inlet surface of the fan and then flowing out through the air outlet surface of the fan, thereby effectively improving the heat dissipation effect of the heat sink 22 on the cooling plate, avoiding heat accumulation at the bottom end 202 of the battery 200 and affecting the test effect of the battery testing device 100.

[0129] For example, the number of fans may include but is not limited to one, two, three or four, etc., and this embodiment of the present application does not specifically limit this.

[0130] See also Figure 6 , Figure 6 A flowchart of a battery testing method provided in an embodiment of the present application. In a second aspect, an embodiment of the present application further provides a battery testing method 200, wherein the battery testing device adopts the battery testing device 100 of the first aspect described above, and the testing method comprises:

[0131] 210. Provide a heating module.

[0132] Optionally, the heating module 10 is disposed at the top 201 of the battery 200 to regulate the temperature of the top 201 of the battery 200 .

[0133] 220. Provide a cooling module.

[0134] Optionally, the cooling module 20 is disposed at the bottom end 202 of the battery 200 to regulate the temperature of the bottom end 202 of the battery 200 .

[0135] 230. Provide a temperature control unit.

[0136] Optionally, the temperature control unit 30 is electrically connected to the heating module 10 and the cooling module 20, and the temperature control unit 30 controls the heating module 10 and the cooling module 20 to adjust the temperature of the top end 201 and the bottom end 202 of the battery 200 to simulate the temperature difference between the top end 201 and the bottom end 202 of the battery under liquid cooling, so as to experimentally study the performance of the battery.

[0137] 240. The temperature control unit detects the temperature of the top end of the battery and / or the temperature of the bottom end of the battery, and controls the operation of the heating module and / or the cooling module according to the detected temperature.

[0138] It can be understood that the temperature control unit 30 can control the heating module 10 to heat the top end 201 of the battery 200 according to the temperature of the top end 201 of the battery 200, and can also control the cooling module 20 to cool the bottom end 202 of the battery 200 according to the temperature of the bottom end 202 of the battery 200. When the temperature of the top end 201 and / or the temperature of the bottom end 202 reaches a preset value, the heating module 10 and / or the cooling module 20 stops working, and the experimenter tests the battery 200, thereby conducting experimental research on the performance and life of the battery.

[0139] It can be seen that the test method of the battery 200 provided in the embodiment of the present application is to set the heating module 10 at the top 201 of the battery 200, set the cooling module 20 at the bottom 202 of the battery 200, and detect the temperature of the top 201 and the bottom 202 of the battery 200 through the temperature control unit 30, and control the operation of the heating module 10 and / or the cooling module 20 according to the detected temperature, so that the battery testing device 100 can simulate the temperature difference formed between the top 201 and the bottom 202 of the battery 200 under the condition of liquid cooling and heat dissipation, thereby meeting the experimental research needs of the experimenter on the battery 200. That is, it is easy to simulate the cycle process of the battery 200 and easy to adjust the temperature difference of the battery 200. In addition, the operation of the test method of the battery 200 is simple, which is convenient for testing the battery 200 on the one hand, and can also facilitate timely adjustment of the test process on the other hand, so as to improve the convenience of testing the performance of the battery 200.

[0140] Among them, during the testing process of the battery 200, the battery testing device 100 can be placed in a constant temperature box for testing, so as to keep the testing process of the battery 200 in a constant and stable temperature environment, providing basic conditions for the stable operation of the battery testing device 100, so that the test results of the battery 200 are accurate and reliable, and are conducive to improving the testing accuracy of the battery 200.

[0141] It is understandable that other structures of the battery testing device 100 used in the battery testing method can be found in the above description and will not be described again here.

[0142] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery testing device, characterized in that: The battery testing device comprises: A heating module, wherein the heating module is configured to be disposed on a top end of the battery; a cooling module, the cooling module being configured to be disposed at a bottom end of the battery; and a temperature control unit, the temperature control unit being electrically connected to the heating module and the cooling module, the temperature control unit being configured to detect the temperature of the top end of the battery and / or the temperature of the bottom end of the battery, and to control the operation of the heating module and / or the cooling module according to the detected temperature; Wherein, the top end of the battery is configured as one end having a top cover assembly.

2. The battery testing device according to claim 1, characterized in that: The heating module is configured to be attached to the shell surface of the battery.

3. The battery testing device according to claim 2, characterized in that: The heating module is configured to be disposed around an outer circumference of a housing of the battery.

4. The battery testing device according to claim 3, characterized in that: The heating modules include a plurality of heating modules, and the plurality of heating modules are sequentially arranged on the shell surface of the battery along the height direction of the battery.

5. The battery testing device according to claim 2, characterized in that: Along the height direction of the battery, the spacing between the heating module and the top cover assembly of the battery is 3mm-5mm.

6. The battery testing device according to claim 1, characterized in that: The thickness of the heating module along the first direction is 1 mm-2 mm; and / or the width of the heating module along the second direction is 4 mm-6 mm; The second direction is the height direction of the battery, and the first direction intersects with the second direction.

7. The battery testing device according to claim 1, characterized in that: The battery testing device also includes a first thermal insulation member, which is coated on the outside of the battery. The first thermal insulation member is provided with a first avoidance hole and a second avoidance hole. The first avoidance hole is configured to allow the pole on the top of the battery to pass through, and the second avoidance hole is configured to avoid the heating module.

8. The battery testing device according to claim 7, characterized in that: The first thermal insulation component includes thermal insulation cotton, and the thickness of the thermal insulation cotton is 3mm-5mm.

9. The battery testing device according to claim 7, characterized in that: The battery testing device further comprises a clamping mechanism, which is configured to clamp on two opposite sides of the battery and clamp the heating module on the housing of the battery to provide a restraining force to the battery.

10. The battery testing device according to claim 9, characterized in that: The battery testing device further includes a second thermal insulation member, which is coated on the outer peripheral surface of the battery so that the clamping mechanism is coated between the first thermal insulation member and the second thermal insulation member.

11. The battery testing device according to any one of claims 1 to 10, characterized in that: The temperature control unit comprises: a plurality of temperature sensing modules, wherein one of the temperature sensing modules is configured to be disposed adjacent to the top of the battery to detect the temperature of the top of the battery, and another of the temperature sensing modules is configured to be disposed at the bottom of the battery to detect the temperature of the bottom of the battery; and, A control module, wherein the control module is electrically connected to the temperature sensing module, the heating module and the cooling module, and the control module is configured to control the operation of the heating module and / or the cooling module according to the temperature detected by each of the temperature sensing modules.

12. The battery testing device according to claim 11, characterized in that: The temperature sensing module includes a temperature sensing wire, and the temperature sensing wire is arranged inside the housing of the battery.

13. The battery testing device according to any one of claims 1 to 10, characterized in that: The battery testing device further includes a voltage stabilizing unit, which is configured to be electrically connected to the heating module and the cooling module.

14. The battery testing device according to any one of claims 1 to 10, characterized in that: The cooling module comprises a refrigeration element, wherein the refrigeration element has a cold end and a hot end along a thickness direction thereof, and the cold end is attached to the bottom end surface of the battery.

15. The battery testing device according to claim 14, characterized in that: The cooling module further includes a heat sink connected to the hot end.

16. A battery testing method, characterized in that: The testing method adopts the battery testing device according to any one of claims 1 to 15, and the testing method comprises: Providing a heating module, and arranging the heating module on the top of the battery; Providing a cooling module, and arranging the cooling module at the bottom end of the battery; Providing a temperature control unit, and electrically connecting the temperature control unit to the heating module and the cooling module; The temperature control unit detects the temperature of the top end of the battery and / or the temperature of the bottom end of the battery, and controls the operation of the heating module and / or the cooling module according to the detected temperature.

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