Direct-cooling and direct-heating thermal management performance detection test bench for battery pack

Abstract

The utility model discloses a direct-cooling and direct-heating thermal management performance detection test bench for a battery pack. A refrigerant output port of a direct-cooling and direct-heating type detection device is sequentially connected in series with an electronic expansion valve, a pressure sensor P1 and a temperature sensor T1 to the battery pack to be detected through a pipeline; a refrigerant input port of the direct-cooling and direct-heating type detection equipment is sequentially connected in series with a pressure sensor P2 and a temperature sensor T2 to a battery pack to be detected through a pipeline; the electronic expansion valve, the pressure sensor P1, the temperature sensor T1, the temperature sensor T2 and the pressure sensor P2 are all connected to an acquisition terminal of the direct-cooling and direct-heating type detection equipment through communication control lines. The device is simple in structure, convenient to operate, high in test detection precision, safe, reliable, strong in reproducibility, high in operability and high in maturity, and has important significance for later design and improvement of the direct cooling plate of the power battery thermal management module.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery pack test technical field, concretely is a battery pack's direct cooling direct heating heat management performance detection test bench. BACKGROUND

[0002] In recent years, under the driving of national policy, compared with traditional fuel vehicles, the technical barriers of electric vehicles are constantly broken, the product iteration of electric vehicles is getting faster and faster, and the sales of new energy vehicles are rising. The thermal management part of the power battery pack in the current electric vehicle has always been the key link of the research and development of major vehicle manufacturers. Due to the characteristics of the power battery pack, it needs to be cooled in a high temperature environment, and it needs to be heated in a low temperature and cold environment to ensure that the power battery pack maintains high performance operation. At present, the thermal management of power battery pack mainly includes natural cooling, air cooling and liquid cooling. The most common heating method at this stage is liquid heating, built-in heating film or PTC element, etc.

[0003] But the above temperature rising and falling method has certain deficiencies in heat exchange efficiency and its own weight, so the whole industry is developing the direct cooling and heating technology of power battery at full speed at this stage. The direct cooling and heating technology of power battery is to directly flow the coolant or heating agent through the cold plate closely attached to the power battery for heat dissipation or heating, which greatly improves the heat dissipation efficiency compared with the liquid cooling system. The direct cooling and heating technology of power battery has obvious advantages. First of all, power battery is easy to age in high temperature environment, and the direct cooling and heating technology of power battery can quickly and effectively reduce the working temperature of the battery, thereby prolonging the service life of the battery. Secondly, the battery is easy to explode or catch fire in high temperature environment, at which time the direct cooling and heating technology of power battery can effectively reduce the working temperature of the battery, thereby reducing the probability of safety accidents. In addition, the performance of power battery is easy to decline in high temperature environment, and the direct cooling and heating technology of power battery can effectively maintain the stability of battery performance, thereby improving the utilization rate and performance of the battery. At the same time, the overall structure of direct cooling and heating system is simple, the cost is reduced, and the grouping rate is high. Therefore, the rapid development of direct cooling and heating technology and the urgent demand of market promote the exploration of application and detection test method of power battery pack.

[0004] In the prior art, a wide range of direct cooling and heating type battery pack temperature control test system with patent number CN117199631A adopts the scheme of "including main compressor in main temperature control circulation loop, a1 heat exchange channel in first main heat exchanger, b1 heat exchange channel in second main heat exchanger, electronic expansion valve and direct cooling plate", and "four-way valve in main temperature control circulation loop, four-way valve including a pass, A pass, b pass and B pass".

[0005] However, the above scheme only provides a detailed design scheme for the design of internal components of a direct cooling and direct heating temperature control test system (detection equipment), does not elaborate from the perspective of constructing an external test bench for the cold direct heat type power battery pack thermal management performance detection, and has the defects of low test precision, which greatly affects the final test results and has a great influence on the design and development of the product end direct cooling plate. At present, there is no standard and method for the thermal management performance test method of the direct cooling and direct heating type power battery pack in the industry, and there is a lack of evaluation method for the thermal management performance of the direct cooling and direct heating type power battery pack. Utility model content

[0006] The utility model aims at providing a direct cooling and direct heating thermal management performance detection test bench for battery pack, to solve the above defects.

[0007] In order to realize the above object, the utility model provides the following technical scheme:

[0008] The utility model provides a direct cooling and direct heating thermal management performance detection test bench for battery pack, which comprises: a direct cooling and direct heating type detection equipment, an electronic expansion valve, a pressure sensor P1, a temperature sensor T1, a temperature sensor T2 and a pressure sensor P2, the refrigerant outlet of the direct cooling and direct heating type detection equipment is connected to the battery pack to be detected in sequence through the pipeline, the electronic expansion valve, the pressure sensor P1 and the temperature sensor T1; the refrigerant inlet of the direct cooling and direct heating type detection equipment is connected to the battery pack to be detected in sequence through the pipeline, the pressure sensor P2 and the temperature sensor T2; the electronic expansion valve, the pressure sensor P1, the temperature sensor T1, the temperature sensor T2 and the pressure sensor P2 are connected to the collection terminal of the direct cooling and direct heating type detection equipment through the communication control line.

[0009] Preferably, the internal direct cooling plate of the battery pack to be detected is provided with a refrigerant inlet and a refrigerant outlet, the refrigerant outlet of the direct cooling and direct heating type detection equipment is connected to the refrigerant inlet of the battery pack to be detected through the pipeline, and the refrigerant inlet of the direct cooling and direct heating type detection equipment is connected to the refrigerant outlet of the battery pack to be detected through the pipeline. The specific position of the circulation loop of the thermal management performance detection test bench on the battery pack to be detected is determined, and the refrigerant inlet and the refrigerant outlet provided on the internal direct cooling plate of the battery pack to be detected are used, so that the refrigerant inlet and the refrigerant outlet are convenient for the refrigerant to enter and exit in the later period.

[0010] Preferably, the refrigerant outlet of the direct cooling and direct heating type detection equipment is connected with a soft copper pipe, the refrigerant inlet of the battery pack to be detected is connected with a hard copper pipe, the end of the soft copper pipe is connected with the end of the hard copper pipe through a soft and hard pipe joint one, and the electronic expansion valve, the pressure sensor P1 and the temperature sensor T1 are all installed on the hard copper pipe. The pressure sensor P1, the temperature sensor T1 and the electronic expansion valve and other components are arranged by adopting the soft pipe combined with the hard copper pipe, so that the external pipeline between the battery pack to be detected and the direct cooling and direct heating type detection equipment is completely matched, and the temperature and pressure detection precision near the refrigerant inlet of the battery pack to be detected is improved.

[0011] Preferably, the refrigerant outlet of the direct cooling and direct heating type detection equipment is connected with a soft copper pipe, the refrigerant inlet of the battery pack to be detected is connected with a hard copper pipe, the end of the soft copper pipe is connected with the end of the hard copper pipe through a soft and hard pipe joint one, and the electronic expansion valve, the pressure sensor P1 and the temperature sensor T1 are all installed on the hard copper pipe. The pressure sensor P1, the temperature sensor T1 and the electronic expansion valve and other components are arranged by adopting the soft pipe combined with the hard copper pipe, so that the external pipeline between the battery pack to be detected and the direct cooling and direct heating type detection equipment is completely matched, and the temperature and pressure detection precision near the refrigerant inlet of the battery pack to be detected is improved.

[0012] Preferably, the refrigerant inlet and the refrigerant outlet of the battery pack to be detected are respectively provided with an inlet water nozzle and an outlet water nozzle, the refrigerant outlet of the direct cooling and direct heating type detection equipment is connected with the inlet water nozzle through a pipeline, and the refrigerant inlet of the direct cooling and direct heating type detection equipment is connected with the outlet water nozzle through a pipeline. The inlet water nozzle and the outlet water nozzle are installed, so that the convenience of directly installing the hard copper pipe with the refrigerant inlet and the refrigerant outlet of the battery pack to be detected is improved.

[0013] Preferably, the inlet water nozzle and the outlet water nozzle are fixedly installed on the battery pack to be detected through an H-shaped water nozzle pressing plate and an H-shaped water nozzle pressing plate fixing screw. The inlet water nozzle and the outlet water nozzle are fixedly installed through the H-shaped water nozzle pressing plate, so that the convenience and stability of installation are improved.

[0014] The utility model discloses the beneficial effect lies in:

[0015] (1) The utility model relates to a battery pack's direct cooling direct heating heat management performance detection test bench, through direct cooling direct heating type detection equipment, electronic expansion valve, pressure sensor P1, temperature sensor T1, temperature sensor T2 and pressure sensor P2 etc. to construct the external test bench of direct cooling direct heating type power battery pack's heat management performance detection, and the temperature and pressure value of the import and export end of the measured battery pack are accurately detected, the actual operation state of the direct cooling direct heating heat management module of the whole vehicle end power battery under various severe working condition conditions of high temperature or low temperature of power battery is fully simulated, and it has important practical reference value for accurately evaluating the high temperature cooling and low temperature heating operation state of the direct cooling direct heating heat management module under extreme environmental conditions.

[0016] (2) The utility model constructs a battery pack's direct cooling direct heating heat management performance detection test bench, can be used for the heat management performance detection test of power battery pack, simple structure, high test detection precision, safe and reliable. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the structure frame diagram of battery pack's direct cooling direct heating heat management performance detection test bench of the utility model,

[0018] Figure 2 It is the flow chart of the construction method of battery pack's direct cooling direct heating heat management performance detection test bench of the utility model. DETAILED DESCRIPTION

[0019] The details in the specific implementation process of the utility model are described in detail below in combination with the drawings.

[0020] Example 1:

[0021] Figure 1 It is the structure frame diagram of battery pack's direct cooling direct heating heat management performance detection test bench of the utility model, as Figure 1 Indicated, a battery pack's direct cooling direct heating heat management performance detection test bench of the utility model, comprising: direct cooling direct heating type detection equipment 1, electronic expansion valve 2, pressure sensor P13, temperature sensor T14, temperature sensor T27 and pressure sensor P28.

[0022] The refrigerant output of direct cooling direct heating type detection equipment 1 is connected on the measured battery pack 100 by pipeline in turn series connection electronic expansion valve 2, pressure sensor P13, temperature sensor T14, the refrigerant input of direct cooling direct heating type detection equipment 1 is connected on the measured battery pack 100 by pipeline in turn series connection pressure sensor P28, temperature sensor T27, electronic expansion valve 2, pressure sensor P13, temperature sensor T14, temperature sensor T27, pressure sensor P28 are all connected on the acquisition terminal of direct cooling direct heating type detection equipment 1 by communication control line.

[0023] The utility model discloses a battery package's direct cooling direct heating heat management performance detection test bench, through direct cooling direct heating type detection equipment, electronic expansion valve, pressure sensor P1, temperature sensor T1, temperature sensor T2 and pressure sensor P2 etc. to construct the external test bench of the heat management performance detection of direct cooling direct heating type power battery package, and the temperature and pressure value of the import and export end of the battery package of the measured piece are accurately detected, the actual operation state of the direct cooling direct heating heat management module of the power battery package at the whole vehicle end under various severe working condition conditions when the power battery is at high temperature or low temperature is fully simulated, and the utility model discloses simple structure, and the test detection precision is high, and safe and reliable.

[0024] Example 2:

[0025] Figure 1 For the structure frame diagram of battery package's direct cooling direct heating heat management performance detection test bench of the utility model, as Figure 1 Shown, the utility model discloses a battery package's direct cooling direct heating heat management performance detection test bench, comprising: direct cooling direct heating type detection equipment 1, electronic expansion valve 2, pressure sensor P13, temperature sensor T14, temperature sensor T27 and pressure sensor P28.

[0026] The refrigerant output of direct cooling direct heating type detection equipment 1 is connected on the measured piece battery package 100 through pipeline and is connected in turn electronic expansion valve 2, pressure sensor P13, temperature sensor T14;The refrigerant input of direct cooling direct heating type detection equipment 1 is connected on the measured piece battery package 100 through pipeline and is connected in turn pressure sensor P28, temperature sensor T27.

[0027] Electronic expansion valve 2, pressure sensor P13, temperature sensor T14, temperature sensor T27, pressure sensor P28 are all connected on the acquisition terminal of direct cooling direct heating type detection equipment 1 through communication control line.

[0028] The inside direct cooling plate of measured piece battery package 100 is provided with refrigerant import and refrigerant export, and the refrigerant import and refrigerant export of measured piece battery package 100 are respectively provided with import nozzle 5 and export nozzle 6, and the import nozzle 5 and export nozzle 6 are fixedly installed on measured piece battery package 100 through H-shaped nozzle pressing plate 11 and H-shaped nozzle pressing plate fixing screw 12.

[0029] The import nozzle 5 of the refrigerant import of measured piece battery package 100 is connected with hard copper pipe, and the refrigerant output of direct cooling direct heating type detection equipment 1 is connected with soft copper pipe, and the end of the soft copper pipe connected with the refrigerant output of direct cooling direct heating type detection equipment 1 is connected with the end of the hard copper pipe connected with import nozzle 5 through soft and hard pipe joint one, and electronic expansion valve 2, pressure sensor P13, temperature sensor T14 are all installed on the hard copper pipe connected with import nozzle 5.

[0030] The outlet water nozzle 6 of the refrigerant outlet of the battery pack to be tested 100 is connected with a hard copper pipe, the refrigerant inlet of the direct cooling and heating type detection equipment 1 is connected with a soft copper pipe, the end of the soft copper pipe connected with the refrigerant inlet of the direct cooling and heating type detection equipment 1 is connected with the end of the hard copper pipe connected with the outlet water nozzle 6 through a soft and hard pipe joint two, and the temperature sensor T27 and the pressure sensor P28 are both installed on the hard copper pipe connected with the outlet water nozzle 6.

[0031] The utility model discloses a battery pack's direct cooling and heating heat management performance detection test bench, through direct cooling and heating type detection equipment, electronic expansion valve, pressure sensor P1, temperature sensor T1, temperature sensor T2 and pressure sensor P2 etc. to construct the external test bench of the heat management performance detection of direct cooling and heating type power battery pack, can be used for the heat management performance detection test of power battery pack, simple structure, test detection precision is high, safe and reliable.

[0032] The utility model discloses a battery pack's direct cooling and heating heat management performance detection test bench can accurately detect the temperature and pressure value of the import and export end of the battery pack to be tested, fully simulates the actual operation state of the direct cooling and heating heat management module of the power battery pack at the whole vehicle end under various severe working condition conditions of the power battery at high temperature or low temperature, and has important practical reference value for accurately evaluating the high temperature cooling and low temperature heating operation state of the direct cooling and heating heat management module under extreme environmental conditions.

[0033] Example 3:

[0034] Figure 1 It is the structural framework drawing of the battery pack's direct cooling and heating heat management performance detection test bench of the utility model, as shown in Figure 1 The utility model discloses a battery pack's direct cooling and heating heat management performance detection test bench, including: direct cooling and heating type detection equipment 1, electronic expansion valve 2, pressure sensor P1 3, temperature sensor T1 4, temperature sensor T2 7 and pressure sensor P2 8.

[0035] The refrigerant output of direct cooling and heating type detection equipment 1 is connected on the battery pack to be tested 100 through pipeline and is connected in order with electronic expansion valve 2, pressure sensor P1 3, temperature sensor T1 4;The refrigerant input of direct cooling and heating type detection equipment 1 is connected on the battery pack to be tested 100 through pipeline and is connected in order with pressure sensor P2 8, temperature sensor T2 7.

[0036] Electronic expansion valve 2, pressure sensor P1 3, temperature sensor T1 4, temperature sensor T2 7, pressure sensor P28 are all connected on the acquisition terminal of direct cooling and heating type detection equipment 1 through communication control line.

[0037] The inner direct cooling plate of the battery pack 100 to be tested is provided with a refrigerant inlet and a refrigerant outlet, and the refrigerant inlet and the refrigerant outlet of the battery pack 100 to be tested are respectively provided with an inlet water nozzle 5 and an outlet water nozzle 6, and the inlet water nozzle 5 and the outlet water nozzle 6 are fixedly installed on the battery pack 100 to be tested through an H-shaped water nozzle pressing plate 11 and an H-shaped water nozzle pressing plate fixing screw 12.

[0038] A hard copper pipe is connected to the inlet water nozzle 5 of the refrigerant inlet of the battery pack 100 to be tested, a soft copper pipe is connected to the refrigerant outlet of the direct cooling and heating type detection equipment 1, and the end of the soft copper pipe connected to the refrigerant outlet of the direct cooling and heating type detection equipment 1 is connected to the end of the hard copper pipe connected to the inlet water nozzle 5 through a soft and hard pipe joint one, and the electronic expansion valve 2, the pressure sensor P13 and the temperature sensor T14 are all installed on the hard copper pipe connected to the inlet water nozzle 5.

[0039] A hard copper pipe is connected to the outlet water nozzle 6 of the refrigerant outlet of the battery pack 100 to be tested, a soft copper pipe is connected to the refrigerant inlet of the direct cooling and heating type detection equipment 1, and the end of the soft copper pipe connected to the refrigerant inlet of the direct cooling and heating type detection equipment 1 is connected to the end of the hard copper pipe connected to the outlet water nozzle 6 through a soft and hard pipe joint two, and the temperature sensor T27 and the pressure sensor P28 are all installed on the hard copper pipe connected to the outlet water nozzle 6.

[0040] The construction method of the battery pack direct cooling and heating thermal management performance detection test bench of the utility model is as shown in Figure 2 The construction method of the battery pack direct cooling and heating thermal management performance detection test bench of the utility model is as shown in

[0041] S1, the direct cooling and heating type detection equipment 1, the electronic expansion valve 2, the pressure sensor P13, the temperature sensor T14, the battery pack 100 to be tested, the temperature sensor T27 and the pressure sensor P28 are connected in sequence into a circulating loop system through a pipeline, and the battery pack direct cooling and heating thermal management performance detection test bench is installed.

[0042] S11, hard copper pipe processing: select two hard copper pipes of a certain length and perform hole processing thereon for standby use.

[0043] The length of the hard copper pipe is best to just meet the effect of arranging the temperature sensor T14, the pressure sensor P13, the electronic expansion valve 2 and other components, and the other hard copper pipe is best to just meet the effect of arranging the temperature sensor T27, the pressure sensor P28 and other components, so that the temperature sensor T14, the pressure sensor P13, the electronic expansion valve 2 and the temperature sensor T27, the pressure sensor P28 can measure the values at the refrigerant inlet and the refrigerant outlet of the inner direct cooling plate of the battery pack 100 to be tested as accurately as possible after installation.

[0044] The opening processing of the hard copper pipe surface is to make the bottom of the devices such as the electronic expansion valve 2, the pressure sensor P1 3, the temperature sensor T1 4, the temperature sensor T2 7 and the pressure sensor P2 8 penetrate into the inside of the hard copper pipe through the opened round hole and be fixed and installed.

[0045] The size of the opened round hole is slightly larger than the detection terminal of the bottom of the installed device. The position interval of the opened round holes between the electronic expansion valve 2, the pressure sensor P1 3 and the temperature sensor T1 4, and between the temperature sensor T2 7 and the pressure sensor P2 8 is 5-10 cm.

[0046] S12, the soft copper pipe connected to the refrigerant inlet of the direct cooling and heating type detection device 1 is introduced to the vicinity of the refrigerant inlet of the internal direct cooling plate of the battery pack 100 to be measured, and then the front end of the hard copper pipe (i.e. the hard copper pipe preset for the installation hole of the electronic expansion valve 2, the pressure sensor P1 3 and the temperature sensor T1 4) reserved in step S11 is connected through the soft and hard pipe joint one.

[0047] S13, the soft copper pipe connected to the refrigerant outlet of the direct cooling and heating type detection device 1 is introduced to the vicinity of the refrigerant outlet of the internal direct cooling plate of the battery pack 100 to be measured, and then the rear end of the other hard copper pipe (i.e. the hard copper pipe preset for the installation hole of the temperature sensor T2 7 and the pressure sensor P2 8) reserved in step S11 is connected through the soft and hard pipe joint two.

[0048] S14, the inlet water nozzle 5 and the outlet water nozzle 6 are respectively installed on the refrigerant inlet and the refrigerant outlet of the internal direct cooling plate of the battery pack 100 to be measured, and then the inlet water nozzle 5 and the outlet water nozzle 6 are fixed and installed on the battery pack 100 to be measured through the H-shaped water nozzle pressing plate 11 and the H-shaped water nozzle pressing plate fixing screw 12.

[0049] S15, the end (rear end) of the hard copper pipe connected to the refrigerant outlet of the direct cooling and heating type detection device 1 through the soft and hard pipe joint one is connected and fixed with the inlet water nozzle 5, and the front end of the hard copper pipe connected to the refrigerant inlet of the direct cooling and heating type detection device 1 through the soft and hard pipe joint two is connected and fixed with the outlet water nozzle 6.

[0050] S16, the detection terminals of the bottom of the devices such as the electronic expansion valve 2, the pressure sensor P1 3, the temperature sensor T1 4, the temperature sensor T2 7 and the pressure sensor P2 8 are installed in the opened round holes on the surfaces of the two hard copper pipes and are sealed and welded to completely seal the opening parts; and the inlet and outlet of the direct cooling machine are respectively connected to the hard copper pipes on the front side of the electronic expansion valve 2 and the rear side of the pressure sensor P2 8 through pipes.

[0051] Temperature sensor T1 4, temperature sensor T2 7 are respectively installed at one end of the hard copper pipe close to the inlet nozzle 5, outlet nozzle 6, so that the temperature sensor and pressure sensor are installed more close to the refrigerant inlet and outlet on the internal straight cooling plate of the battery pack 100 to be tested, so as to ensure that the measured refrigerant pressure, temperature and the actual data of the refrigerant inlet and outlet of the internal straight cooling plate of the battery pack 100 to be tested are as close as possible.

[0052] S17, the electronic expansion valve 2, the pressure sensor P1 3, the temperature sensor T1 4, the temperature sensor T2 7, the pressure sensor P2 8 are all connected through the communication control line to the collection terminal of the straight cooling and heating type detection equipment 1, so that the temperature, pressure and other detailed data detected by each device can be more intuitively observed through the display screen of the straight cooling and heating type detection equipment 1.

[0053] After the above operation, the straight cooling and heating type detection equipment 1, the electronic expansion valve 2, the pressure sensor P1 3, the temperature sensor T1 4, the battery pack 100 to be tested, the temperature sensor T2 7, the pressure sensor P2 8 and the like are sequentially connected to form a circulating loop system, and thereafter the connection effect of the battery pack straight cooling and heating heat management performance test bench constructed needs to be checked through the vacuum pumping and pressure maintaining detection function of the straight cooling and heating type detection equipment 1.

[0054] S2, the whole circulating loop system inside the battery pack straight cooling and heating heat management performance test bench is pumped by the straight cooling and heating type detection equipment 1, and pressure maintaining detection is carried out. The detailed steps are as follows:

[0055] S21, the straight cooling and heating type detection equipment 1 is started to pump the whole circulating loop system, and the pumping is stopped until the pressure values of the pressure sensor P13 and the pressure sensor P28 displayed on the display screen of the straight cooling and heating type detection equipment 1 reach-100kPa;

[0056] S22, after the pumping is finished, the pressure maintaining detection for 24 hours is started; when the 24-hour pressure maintaining detection is finished, if the pressure value inside the circulating loop system is not greater than-90kPa, the subsequent formal test is started; if the pressure value inside the circulating loop system is greater than-90kPa, the leakage point of the circulating loop system of the test bench system is checked and handled, and the pumping and pressure maintaining detection operation is repeated until the requirement of starting the subsequent test is met.

[0057] S3, after the pressure maintaining detection of S2 step is normal, the R134A type refrigerant is injected into the whole circulating loop system of the battery pack straight cooling and heating heat management performance test bench through the straight cooling and heating type detection equipment 1.

[0058] At the same time, the injected refrigerant type is not limited to R134A type refrigerant, and can be determined by the customer.

[0059] S4, according to the thermal management performance test requirements of the power battery pack, input device parameters, start the cooling machine, provide the required refrigerating capacity or heating capacity input to the refrigerant in the circulating loop system, and start the test.

[0060] The input related device parameters usually include but are not limited to supercooling degree, superheating degree, electronic expansion valve front pressure, outlet pressure value, inlet temperature, outlet temperature and the like, which can be one parameter or multiple parameters.

[0061] S5, after the test is normal, the whole construction process of the battery pack direct cooling and heating thermal management performance test bench is completed, and the thermal management performance test of the power battery pack can be completed through the constructed battery pack direct cooling and heating thermal management performance test bench.

[0062] The utility model discloses a battery pack's direct cooling and heating thermal management performance test bench, through direct cooling and heating type detection equipment, electronic expansion valve, pressure sensor P1, temperature sensor T1, temperature sensor T2 and pressure sensor P2 and so on to construct the external test bench of direct cooling and heating type power battery pack's thermal management performance detection, and the temperature and pressure value of the import and export end of the measured battery pack are accurately detected, and the actual running state of the direct cooling and heating thermal management module of the power battery pack at the whole vehicle end under various severe working condition conditions of the power battery in high temperature or low temperature is fully simulated, and the high temperature cooling and low temperature heating running state of the direct cooling and heating thermal management module under extreme environmental conditions are accurately evaluated, and it has important practical reference value.

[0063] The utility model discloses a battery pack's direct cooling and heating thermal management performance test bench, can be used for the thermal management performance test of power battery pack, and the structure is simple, and the test detection precision is high, and safe and reliable.

[0064] The utility model discloses a battery pack's direct cooling and heating thermal management performance test bench, its construction method fills the blank of the power battery pack with direct cooling and heating thermal management module in the thermal management performance detection method, and the method can be copied strongly, and the operation is high, and the maturity is high, and it has important significance to the direct cooling plate later design and improvement of power battery thermal management module.

[0065] The utility model has been described exemplarily in the above-mentioned combination with the drawings, and obviously, the specific implementation of the utility model is not limited by the above-mentioned mode, as long as the method concept and technical scheme of the utility model are adopted to carry out this kind of non-essential improvement, or the concept and technical scheme of the utility model are directly applied to other occasions without improvement, all are within the protection scope of the utility model.

Claims

1. A battery pack direct cooling and direct heating thermal management performance test bench, characterized in that, The application relates to a direct-cooling and direct-heating type detection device (1), an electronic expansion valve (2), a pressure sensor P1 (3), a temperature sensor T1 (4), a temperature sensor T2 (7) and a pressure sensor P2 (8), a refrigerant outlet of the direct-cooling and direct-heating type detection device (1) is connected to a battery pack (100) to be detected in sequence through a pipeline, an electronic expansion valve (2), a pressure sensor P1 (3), a temperature sensor T1 (4), a temperature sensor T2 (7) and a pressure sensor P2 (8) are connected to a collection terminal of the direct-cooling and direct-heating type detection device (1) through a communication control line. The inside of the battery pack (100) to be detected is provided with a refrigerant inlet and a refrigerant outlet, the refrigerant outlet of the direct-cooling and direct-heating type detection device (1) is connected to the refrigerant inlet of the battery pack (100) to be detected through a pipeline, and the refrigerant inlet of the direct-cooling and direct-heating type detection device (1) is connected to the refrigerant outlet of the battery pack (100) to be detected through a pipeline.

2. The battery pack direct cooling and direct heating thermal management performance test bench according to claim 1, characterized in that, A soft copper pipe is connected to the refrigerant outlet of the direct-cooling and direct-heating type detection device (1), a hard copper pipe is connected to the refrigerant inlet of the battery pack (100) to be detected, the end of the soft copper pipe is connected to the end of the hard copper pipe through a soft and hard pipe joint one, and the electronic expansion valve (2), the pressure sensor P1 (3) and the temperature sensor T1 (4) are all installed on the hard copper pipe.

3. The battery pack direct cooling and direct heating thermal management performance test bench according to claim 2, characterized in that, A soft copper pipe is connected to the refrigerant inlet of the direct-cooling and direct-heating type detection device (1), a hard copper pipe is connected to the refrigerant outlet of the battery pack (100) to be detected, the end of the soft copper pipe is connected to the end of the hard copper pipe through a soft and hard pipe joint two, and the temperature sensor T2 (7) and the pressure sensor P2 (8) are all installed on the hard copper pipe.

4. The battery pack direct cooling and direct heating thermal management performance test bench according to claim 2, characterized in that, The refrigerant inlet and the refrigerant outlet of the battery pack (100) to be detected are respectively provided with an inlet water nozzle (5) and an outlet water nozzle (6), the refrigerant outlet of the direct-cooling and direct-heating type detection device (1) is connected to the inlet water nozzle (5) through a pipeline, and the refrigerant inlet of the direct-cooling and direct-heating type detection device (1) is connected to the outlet water nozzle (6) through a pipeline.

5. The battery pack direct cooling and direct heating thermal management performance test bench according to claim 2, characterized in that, The inlet water nozzle (5) and the outlet water nozzle (6) are fixedly installed on the battery pack (100) to be detected through an H-shaped water nozzle pressing plate (11) and an H-shaped water nozzle pressing plate fixing screw (12).

6. The battery pack direct cooling and direct heating thermal management performance test bench according to claim 5, characterized in that, ​

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