CN219039314U - Power battery monomer thermal diffusion test tank body - Google Patents
Power battery monomer thermal diffusion test tank body Download PDFInfo
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- CN219039314U CN219039314U CN202223078635.2U CN202223078635U CN219039314U CN 219039314 U CN219039314 U CN 219039314U CN 202223078635 U CN202223078635 U CN 202223078635U CN 219039314 U CN219039314 U CN 219039314U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides a power battery monomer thermal diffusion test cell body, which comprises a lower cell body, an upper cover for covering the lower cell body, a water inlet, a water outlet, a water inlet and a water outlet on the lower cell body, a water cooling plate in the lower cell body, an explosion-proof valve positioning clamp, a balancing weight and a battery monomer to be tested, wherein the battery monomer to be tested is positioned between adjacent water cooling plates and is provided with a heat insulation material, a heating plate and a temperature sensor; the device provides a closed space for the battery monomer safety test and highly simulates the whole package working environment. The device simulates a water cooling structure of the battery assembly, is connected with a water cooling machine, performs water cooling and cooling when the battery monomer to be tested is in thermal runaway, and verifies the inhibition effect of different cooling strategies on the thermal diffusion of the battery.
Description
Technical Field
The utility model belongs to the field of new energy automobile test devices, and relates to a power battery monomer thermal diffusion test cell body.
Background
At present, with the rapid development of new energy automobiles, the safety of a power battery system as one of the cores of the electric automobiles is also concerned by various parties, wherein the tests such as thermal runaway and thermal diffusion of the power battery system are one of the important ways of verifying the safety of the power battery system, the out-of-control thermal diffusion of one battery is to the working efficiency of the test, the cost also puts higher requirements, and the current problems are that the working efficiency is improved, the test cost is reduced:
(1) The difficulty of performing the thermal diffusion test of the battery monomer alone is lack of a closed space, and the explosion-proof strength of the closed space should be similar to that of the battery pack, but the cost of directly performing thermal diffusion on the battery pack or selecting a battery pack shell as a container is too high, and resources are also wasted too;
(2) The explosion-proof valve of the simulated battery pack lacks a box body with a pressure relief device, and can release pressure outwards when the pressure in the box body is overlarge after the battery is out of control;
(3) The test box body with the cooling plate is absent, a battery pack cooling system is simulated, and other battery monomers can be cooled after the battery is out of control;
disclosure of Invention
The utility model provides a battery cell thermal diffusion test cell body, which solves the problem that a battery cell thermal diffusion test lacks a closed space, and the explosion-proof strength of the closed space is similar to that of a battery pack, so that the cost of directly carrying out thermal diffusion on the battery pack or selecting a battery pack shell as a container is too high, and resources are also wasted too much;
in order to solve the technical problems, the utility model is realized by adopting the following technical scheme:
a battery cell thermal diffusion test cell body for matching with a plurality of battery cells to be tested for thermal diffusion test comprises a lower cell body of a rectangular box body structure with an opening at the top of a metal material and an upper cover of the metal material for covering the opening at the top of the lower cell body, wherein three explosion-proof valves communicated with the inner cavity of the lower cell body are uniformly arranged on the front surface and the rear surface of the lower cell body at intervals, the three explosion-proof valves on the front surface of the lower cell body and the rear surface of the lower cell body are arranged in a one-to-one symmetry manner, a water inlet and a water outlet which are communicated with the inner cavity of the lower cell body are respectively arranged at two ends of one side surface of the lower cell body, the water inlet is connected with the water outlet of an external water cooling machine through a water cooling pipe, the water outlet is connected with the water return opening of the external water cooling machine through a water cooling pipe, a plurality of water cooling plates which are uniformly distributed along the width direction of the lower cell body at intervals are arranged in the lower cell body, the water cooling plates are fixed in the lower tank body through positioning fixtures capable of adjusting the transverse position, the longitudinal position and the moment, two ends of the adjacent water cooling plates are communicated with each other through water cooling pipes, two ends of the water cooling plate closest to the water inlet and the water outlet are respectively communicated with the water inlet and the water outlet through the water cooling pipes, a plurality of battery monomers to be tested are arranged between the adjacent two water cooling plates from front to back, a heat insulation material and a heating sheet are adhered between the adjacent two battery monomers to be tested between the adjacent two water cooling plates, a temperature sensor is arranged on the surface of each battery monomer to be tested, a wire harness for the heating sheet and a wire harness for the temperature sensor are arranged on the side surface of the lower tank body where the water inlet and the water outlet are positioned, two wire inlet and outlet are positioned between the water inlet and the water outlet, the battery monomers to be tested are positioned between the two water cooling plates, a plurality of battery monomers to be tested are arranged between two adjacent water cooling plates from front to back at intervals.
The further technical scheme comprises the following steps:
the upper end faces of four vertical surfaces forming the top opening of the lower tank body are respectively provided with an outward flanging so as to form a rectangular frame structure, a plurality of tank body threaded holes with uniform intervals are formed in the rectangular frame structure, upper cover threaded holes in one-to-one correspondence with the tank body threaded holes are formed in the upper cover, and the upper cover is fixedly connected with the lower tank body through fixing bolts after being covered on the top opening of the lower tank body.
Sealing materials are arranged between the upper cover and the lower tank body and are positioned on the rectangular frame structure of the lower tank body.
The water inlet and the water outlet are both metal pipes welded with the side surface of the lower tank body and communicated with the inner cavity of the lower tank body.
The lower tank body is internally provided with a balancing weight.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model provides a monomer thermal diffusion test cell body of a power battery, which provides a monomer thermal diffusion closed space; the whole device is provided with a water cooling plate, and the inhibition effect of different cooling strategies on the heat diffusion of the battery is verified; the device can verify the inhibition effect of different heat insulation materials on a thermal runaway test; the whole device is provided with explosion-proof valve mounting ports, the pressure release capacity of different explosion-proof valves is verified, and the structure of the battery assembly is simulated; the device can verify the single thermal runaway phenomenon characterization of single thermal runaway and the performance of the heat insulation material in blocking thermal diffusion, provides support for the safety design and development of the battery assembly, reduces the times of tests at the assembly level, and reduces the test cost; the device can verify the tightness of the sealing material of the box body, provides support for the structural design development of the battery assembly, reduces the test times at the assembly level, and reduces the test cost.
Drawings
The utility model is further described below with reference to the accompanying drawings:
fig. 1 is a schematic diagram of the external structure of a cell body for a thermal diffusion test of a power battery cell according to the present utility model.
Fig. 2 is a schematic diagram of the internal structure of a cell body for a thermal diffusion test of a power battery cell according to the present utility model.
In the figure: 1. the device comprises a lower tank body, an upper cover, a water inlet, a water outlet, a line inlet and a line outlet, a water cooling plate, an explosion-proof valve, a positioning clamp, a sealing material, a tank body threaded hole, a balancing weight, a battery unit to be tested, and an upper cover threaded hole, wherein the lower tank body, the upper cover, the water inlet, the water outlet, the line inlet and the line outlet, the water cooling plate, the explosion-proof valve, the positioning clamp, the sealing material, the tank body threaded hole, the balancing weight, the battery unit to be tested and the upper cover are arranged in sequence.
Detailed Description
The utility model is described in detail below with reference to the attached drawing figures:
the utility model provides a power battery monomer thermal diffusion test cell body, which is used for carrying out thermal diffusion test by matching with a plurality of battery monomers 12 to be tested, as shown in fig. 1 and 2, and comprises a lower cell body 1 with a rectangular box body structure and an upper cover 2, wherein the rectangular box body structure is provided with an opening at the top, the upper cover 2 is used for covering the opening at the top of the lower cell body 1, the lower cell body 1 and the upper cover 2 are both made of metal materials, three explosion-proof valves 7 communicated with the inner cavity of the lower cell body 1 are uniformly arranged on the front surface and the rear surface of the lower cell body 1 at intervals, the three explosion-proof valves 7 on the front surface of the lower cell body 1 and the three explosion-proof valves 7 on the rear surface of the lower cell body 1 are symmetrically arranged one by one, and in the test, if explosion occurs in the cell body, the explosion-proof valves 7 are easy to deform and damage the cell body is easy to be caused due to the excessive internal pressure of the cell body, and the structural integrity of the cell body is ensured; the two ends of one side surface of the lower tank body 1 are respectively provided with a water inlet 3 and a water outlet 4 which are communicated with the inner cavity of the lower tank body 1, and the water inlet 3 and the water outlet 4 are all metal pipes which are welded with the side surface of the lower tank body 1 and are communicated with the inner cavity of the lower tank body 1. The water inlet 3 is connected with the water outlet of an external water cooler through a water cooling pipe, the water outlet 4 is connected with the water return port of the external water cooler through a water cooling pipe, a plurality of water cooling plates 6 which are uniformly distributed along the width direction of the lower tank body 1 are arranged in the lower tank body 1, the water cooling plates 6 are fixed in the lower tank body 1 through positioning fixtures 8 which can adjust the transverse position, the longitudinal position and the moment, two ends of the adjacent water cooling plates 6 are communicated with each other through the water cooling pipe, two ends of the water cooling plate 6 closest to the water inlet 3 and the water outlet 4 are respectively communicated with the water inlet 3 and the water outlet 4 through the water cooling pipe, the battery cell 12 to be measured is positioned between the two adjacent water cooling plates 6, a plurality of battery monomers 12 to be tested are arranged between two adjacent water cooling plates 6 from front to back, a heat insulation material and a heating plate are adhered between two adjacent battery monomers 12 to be tested between two adjacent water cooling plates 6, a temperature sensor is arranged on the surface of each battery monomer 12 to be tested, two wire inlet and outlet ports 5 are arranged on the side surface of the lower tank body 1 where the water inlet 3 and the water outlet 4 are located, a wire harness for the heating plate and a wire harness for the temperature sensor penetrate through the water inlet 3 and the water outlet 4, the battery monomers 12 to be tested are arranged between the two water cooling plates 6, and a plurality of battery monomers 12 to be tested are arranged between the two adjacent water cooling plates 6 from front to back at intervals.
In this embodiment, the upper end surfaces of the four vertical surfaces forming the top opening of the lower tank body 1 are all provided with outward flanges so as to form a rectangular frame structure, a plurality of evenly spaced tank body threaded holes 10 are formed in the rectangular frame structure, the upper cover 2 is provided with upper cover threaded holes 101 corresponding to the tank body threaded holes 10 one by one, and the upper cover 2 is fixedly connected with the lower tank body 1 through fixing bolts after being covered on the top opening of the lower tank body 1. A sealing material 9 is arranged between the upper cover 2 and the lower tank body 1 and is positioned on the rectangular frame structure of the lower tank body 1.
A balancing weight 11 is arranged in the lower tank body 1. The balancing weight 11 is used for filling redundant space of the cell body, the use quantity is determined according to the quantity of the test cells, and the balancing weight 11 is made of non-inflammable materials.
The device provides a closed space for the battery monomer safety test and highly simulates the whole package working environment. The device simulates a water cooling structure of the battery assembly, is connected with a water cooling machine, performs water cooling and cooling when the battery unit 12 to be tested is in thermal runaway, and verifies the inhibition effect of different cooling strategies on the thermal diffusion of the battery.
The process of using the power battery monomer thermal diffusion test cell body provided by the utility model for testing is as follows:
taking tests of different water cooling strategies and different heat insulation materials on blocking heat diffusion performance as examples:
s1, preprocessing a battery monomer 12 to be detected, and adjusting the battery state to be 100% soc;
s2: 6 explosion-proof valves 7 are respectively arranged at reserved positions of the front surface and the rear surface of the lower tank body 1;
s3: the test battery is reformed, a heat insulation material and a heating sheet to be verified are adhered between the battery cells 12 to be tested and the adjacent battery cells 12 to be tested, and a temperature sensor is arranged on the surface of each battery cell 12 to be tested;
s4, placing the modified battery monomer 12 to be tested into the lower tank body 1, tightly attaching the surface of the battery monomer 12 to be tested to the water cooling plate 6, adjusting the pressing force of the positioning clamp 8 to the water cooling plate 6, penetrating out the heating plate and the sensor wire harness through the wire inlet and outlet port 5, and then plugging the wire inlet and outlet port 5 by sealing mud;
s5, respectively connecting a water outlet and a water return port of the water cooling machine with a water outlet 4 of a water inlet 3 of the tank body 1, starting the water cooling machine to confirm whether the water cooling pipe is connected with a liquid leakage condition or not, and confirming that the liquid leakage condition is not present, and then carrying out the next step;
s6, distributing the balancing weight 11 to the redundant space of the whole lower tank body 1
S7, attaching a sealing material 9 between the lower tank body 1 and the upper cover 2, and driving a fixing bolt into a tank body threaded hole 10 according to the torsion of the battery assembly, wherein the tank body formed by the lower tank body 1 and the upper cover 2 is in a sealing state;
s8, starting a test: the heating plate is electrified and heated until the first battery cell 12 to be tested is out of control;
s9, starting a water cooling machine, and circulating cooling liquid to the water cooling plate 6 in the lower tank body 1 according to a preset water cooling strategy;
s10, obtaining a temperature rise curve by observing data acquired by a temperature sensor, so as to judge the influence of different water cooling strategies and different heat insulation materials on blocking the thermal diffusion performance.
Claims (5)
1. A battery cell thermal diffusion test cell body for being matched with a plurality of battery cells (12) to be tested to carry out thermal diffusion test is characterized by comprising a lower cell body (1) of a rectangular box body structure with an opening at the top of a metal material and an upper cover (2) of the metal material for covering the opening at the top of the lower cell body (1), wherein three explosion-proof valves (7) communicated with the inner cavity of the lower cell body (1) are uniformly arranged on the front surface and the rear surface of the lower cell body (1) at intervals, the three explosion-proof valves (7) on the front surface of the lower cell body (1) are symmetrically arranged with the three explosion-proof valves (7) on the rear surface of the lower cell body (1), a water inlet (3) and a water outlet (4) communicated with the inner cavity of the lower cell body (1) are respectively arranged at two ends of one side surface of the lower cell body (1), the water inlet (3) is connected with a water outlet of an external water cooler through a water cooling pipe, the water outlet (4) is connected with a water cooling pipe through a water cooling port of the external water cooler, the lower cell body (1) is internally provided with a plurality of water cooling clamps (6) which are uniformly distributed along the width of the lower cell body (1) and the water cooling plates (6) are fixedly arranged at the two adjacent positions in the longitudinal directions along the water cooling pipe (6) and the two adjacent water cooling plates (6) are positioned along the longitudinal directions, two ends of a water cooling plate (6) closest to a water inlet (3) and a water outlet (4) are respectively communicated with the water inlet (3) and the water outlet (4) through water cooling pipes, a battery monomer (12) to be tested is positioned between two adjacent water cooling plates (6), a plurality of battery monomers (12) to be tested are arranged between the two adjacent water cooling plates (6) from front to back, a heat insulation material and a heating plate are adhered between the two adjacent battery monomers (12) to be tested between the two adjacent water cooling plates (6), a temperature sensor is arranged on the surface of each battery monomer (12) to be tested, and two wire inlet and outlet openings (5) are positioned between the water inlet (3) and the water outlet (4) and used for penetrating through a wire harness of the heating plate and a wire harness of the temperature sensor.
2. The power battery monomer thermal diffusion test cell body according to claim 1, wherein the upper end faces of four vertical surfaces forming the top opening of the lower cell body (1) are respectively provided with an outward flanging so as to form a rectangular frame structure, a plurality of cell body threaded holes (10) with uniform intervals are formed in the rectangular frame structure, an upper cover threaded hole (101) corresponding to the cell body threaded holes (10) one by one is formed in the upper cover (2), and the upper cover (2) is fixedly connected with the lower cell body (1) through fixing bolts after being covered on the top opening of the lower cell body (1).
3. A power battery cell body heat diffusion test cell body according to claim 2, characterized in that a sealing material (9) is arranged between the upper cover (2) and the lower cell body (1) and is positioned on the rectangular frame structure of the lower cell body (1).
4. The power battery monomer thermal diffusion test cell body according to claim 1, wherein the water inlet (3) and the water outlet (4) are both metal pipes welded with the side surface of the lower cell body (1) and communicated with the inner cavity of the lower cell body (1).
5. A power cell unit heat diffusion test cell according to any one of claims 1 to 4, wherein a counterweight (11) is provided in the lower cell body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223078635.2U CN219039314U (en) | 2022-11-21 | 2022-11-21 | Power battery monomer thermal diffusion test tank body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223078635.2U CN219039314U (en) | 2022-11-21 | 2022-11-21 | Power battery monomer thermal diffusion test tank body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219039314U true CN219039314U (en) | 2023-05-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223078635.2U Active CN219039314U (en) | 2022-11-21 | 2022-11-21 | Power battery monomer thermal diffusion test tank body |
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| Country | Link |
|---|---|
| CN (1) | CN219039314U (en) |
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2022
- 2022-11-21 CN CN202223078635.2U patent/CN219039314U/en active Active
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