A new energy battery module

Abstract

The present invention relates to a new energy battery module, which belongs to the field of new energy batteries. The new energy battery module of the present invention includes a new energy battery, the outer sleeve of the new energy battery is provided with a conductive shell, the conductive shell includes a conductive slot and a slot cover, a leaf spring is arranged between the bottom of the new energy battery and the bottom of the conductive slot; an annular channel is arranged between the conductive shell and the new energy battery, and the inside of the annular channel is filled with conductive electromagnetic plasma; a megasonic vibrator is installed under the bottom of the conductive slot. The new energy battery module of the present invention can simply and effectively remove static electricity in the new energy battery during vibration and drop tests, without disassembling the machine and interrupting the high-frequency vibration simulation test process, thereby significantly improving the test efficiency. The present invention provides a new idea for the future automatic static removal technology of new energy batteries.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy batteries, and in particular to a new energy battery module. Background Art

[0002] New energy batteries generally refer to storage batteries used in new energy vehicles, which generally include lead-acid batteries, nickel-hydrogen batteries, sodium-sulfur batteries, secondary lithium batteries, and ternary lithium batteries.

[0003] During the research and development process of new energy batteries, various tests need to be carried out, such as electrical testing, safety performance testing, mechanical testing, thermal testing, environmental simulation testing, etc.

[0004] During various tests, the static electricity generated by new energy batteries will accumulate, and static electricity removal operations need to be performed regularly. During vibration and drop tests, it is usually necessary to fill anti-vibration media. During high-frequency vibration, new energy batteries are more likely to generate static electricity. If it is not removed in time, there will be certain safety risks. During high-frequency vibration, if static electricity removal is interrupted, it will undoubtedly seriously affect the test efficiency.

[0005] Based on this, the present invention is proposed. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a new energy battery module, and its technical solution is as follows:

[0007] A new energy battery module comprises a new energy battery, wherein the new energy battery is externally sheathed with a conductive shell, the conductive shell comprises a conductive slot and a slot cover, a leaf spring is arranged between the bottom of the new energy battery and the bottom of the conductive slot; an annular channel is arranged between the conductive shell and the new energy battery, the interior of the annular channel is filled with conductive electromagnetic plasma; a megasonic vibrator is installed below the bottom of the conductive slot.

[0008] As a further solution of the present invention, a heat exchange channel is arranged inside the new energy battery, a flexible hose connected to the heat exchange channel is arranged on the outside of the new energy battery, a pipe joint is arranged on the outside of the conductive groove, and the flexible hose is connected to the pipe joint.

[0009] As a further solution of the present invention, the leaf spring includes at least three arc-shaped elastic plates, the arc lengths of the elastic plates are arranged to decrease proportionally from top to bottom, and all the elastic plates are fastened with metal hoops; both ends of the uppermost elastic plate are rotatably connected to a rotating drum, and the bottom of the new energy battery is provided with a limiting groove arranged along the length direction of the new energy battery, the upper end of the rotating drum is located in the limiting groove and there is a clearance fit between the upper end of the rotating drum and the limiting groove; the middle part of the lowermost elastic plate is fixedly connected to the bottom of the conductive groove.

[0010] As a further solution of the present invention, the width of the elastic plate is arranged to decrease in equal proportion from top to bottom, a plurality of elliptical hollow holes are arranged on the surface of the elastic plate, the length direction of the hollow holes is arranged parallel to the width direction of the elastic plate, a magnetic strip is installed in the center of the hollow hole, and the length direction of the magnetic strip is arranged parallel to the width direction of the elastic plate.

[0011] As a further solution of the present invention, the electromagnetic plasma is composed of ferroferric oxide powder, copper powder and oil-based medium mixed in a mass ratio of 55:20:(23-27).

[0012] As a further solution of the present invention, the D90 of the ferroferric oxide powder is less than or equal to 10 μm, the particle size of the copper powder is larger than the particle size of the ferroferric oxide powder, and the D90 of the copper powder is 75 to 85 μm.

[0013] As a further solution of the present invention, the bottom of the conductive slot near the megasonic vibrator is electrically connected to a grounding wire.

[0014] As a further solution of the present invention, the megasonic frequency of the megasonic oscillator is 2.7 MHz.

[0015] As a further solution of the present invention, three elastic plates are provided.

[0016] As a further solution of the present invention, an angle seat is installed below the bottom of the conductive slot.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The new energy battery module of the present invention can simply and effectively remove static electricity in the new energy battery during vibration and drop tests without disassembling the machine or interrupting the high-frequency vibration simulation test process, thereby significantly improving the test efficiency.

[0019] 2. The present invention provides a new idea for the automatic static removal technology of future new energy batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a new energy battery module;

[0021] Figure 2 is a schematic diagram of the structure of the elastic plate;

[0022] Figure 3 It is a graph of high frequency vibration frequency and y. DETAILED DESCRIPTION

[0023] The present invention is described in detail below in conjunction with specific embodiments. The embodiments described below are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0024] Example 1

[0025] like Figure 1 , 2 As shown, a new energy battery module includes a new energy battery 10, the outer sleeve of the new energy battery 10 is provided with a conductive shell, the conductive shell includes a conductive slot 25 and a slot cover 24, a leaf spring 30 is arranged between the bottom of the new energy battery 10 and the bottom of the conductive slot 25; an annular channel 21 is arranged between the conductive shell and the new energy battery 10, and the inside of the annular channel 21 is filled with conductive electromagnetic plasma; a megasonic vibrator 50 is installed below the bottom of the conductive slot 25.

[0026] The leaf spring 30 not only plays a shock-absorbing role, but also can "stir up and down" the surrounding electromagnetic plasma during vibration.

[0027] The leaf spring 30 includes at least three arc-shaped elastic plates. For example, in this embodiment, three elastic plates are provided. The conductive slot 25 and the slot cover 24 are preferably copper slots and copper covers.

[0028] The arc lengths of the elastic plates are arranged to decrease in proportion from top to bottom, and all the elastic plates are fastened with metal hoops; the two ends of the elastic plate on the top layer are rotatably connected with a rotating drum 31, and the bottom of the new energy battery 10 is provided with a limiting groove arranged along the length direction of the new energy battery 10, and the upper end of the rotating drum 31 is located in the limiting groove and there is a clearance fit between the upper end of the rotating drum 31 and the limiting groove; the middle part of the elastic plate on the bottom layer is fixedly connected to the bottom of the conductive groove 25.

[0029] The width of the elastic plate 301 is arranged to decrease in proportion from top to bottom. A plurality of elliptical hollow holes 302 are arranged on the surface of the elastic plate 301. The length direction of the hollow holes 302 is arranged parallel to the width direction of the elastic plate 301. A magnetic strip 303 is installed in the center of the hollow hole 302. The length direction of the magnetic strip 303 is arranged parallel to the width direction of the elastic plate 301.

[0030] The electromagnetic plasma is composed of ferroferric oxide powder, copper powder and oil-based medium in a mass ratio of 55:20:(23-27), for example, in a mass ratio of 55:20:23. The D90 of the ferroferric oxide powder is less than or equal to 10 μm, the particle size of the copper powder is larger than that of the ferroferric oxide powder, and the D90 of the copper powder is 75 μm.

[0031] The preparation method of the oil-based medium comprises the following steps:

[0032] Step 1, reacting 1.1 kg of glycerol, 5.56 kg of linseed oil and 0.63 kg of ethanol at 240° C. or 245° C. for 2 hours to obtain a first product;

[0033] Step 2: Cool the first product to room temperature, add 0.09 kg or 0.11 kg of saturated calcium acetate solution, stir for 3 min, heat to 100° C. and perform vacuum distillation for 20 min to obtain the oil-based medium.

[0034] The simplest method of releasing static electricity is to electrically connect a grounding wire to the bottom of the conductive slot 25 near the megasonic vibrator 50. The slot cover 24 can also be grounded.

[0035] When static electricity of a certain charge is accumulated inside the new energy battery 10, the megasonic vibrator 50 is started regularly, and the megasonic frequency of the megasonic vibrator 50 is 2.7 MHz. Under the action of the megasonic vibration generated by the megasonic vibrator 50, the conductive electromagnetic plasma located near the leaf spring 30 will become hard and become "quasi-solid", so that the conductive electromagnetic plasma between the bottom of the new energy battery 10 and the bottom of the conductive groove 25 has a significantly improved conductive performance, and the static electricity will quickly pass through the hardened conductive electromagnetic plasma, and finally achieve the purpose of static electricity grounding to eliminate the static electricity hazard.

[0036] In this embodiment, the electroconductive plasma is a non-Newtonian fluid having shear thickening properties.

[0037] If static electricity is removed by electrically connecting a wire between the new energy battery 10 and the conductive slot 25, the disadvantages of this method are:

[0038] The wire can only quickly remove static electricity in the vicinity of it. The farther away from the wire, the worse the static electricity removal effect. In order to ensure the static electricity removal effect, a large number of wires must be set. The setting of a large number of wires may pose a safety hazard of wire falling off in an environment of long-term high-frequency vibration, and the maintenance is also difficult. In addition, there are various interfaces or other components on the outer shell of the existing new energy battery 10, which makes its surface uneven and the conditions for generating static electricity vary. Each time static electricity is removed, there will be a lot of static electricity residual. Finally, the new energy battery 10 generally needs to undergo anti-static testing, which requires a certain degree of static electricity to accumulate in the new energy battery 10. If there are wires, the static electricity accumulated in the new energy battery 10 cannot reach the peak value; therefore, it is necessary to use another set of testing equipment.

[0039] Electroconductive plasma has the following properties:

[0040] 1) It has a certain performance of absorbing vibration energy. As the megasonic frequency of the megasonic vibrator 50 changes continuously, the hardening degree of the electromagnetic plasma is different, which can be used to simulate the seismic medium with different shock absorption degrees, and significantly improve the convenience of vibration resistance test.

[0041] 2) When the conductive electromagnetic plasma is initially free of vibration, it is in a fluid state, so that it is easy to completely fill the annular channel 21 between the new energy battery 10 and the conductive slot 25.

[0042] 3) When the megasonic frequency of the conductive electromagnetic plasma is 2.7MHz, on the one hand, the gaps inside it are small enough, and on the other hand, due to resonance and other reasons, the copper powder is evenly dispersed and tightly combined to form a very smooth "conductive channel", thereby significantly improving the static electricity removal effect.

[0043] Although the closer the area is to the megasonic vibrator 50, the better the conductivity of the electromagnetic plasma in the area, in this embodiment, when the electromagnetic plasma is at a megasonic frequency of 2.7 MHz, the part of the electromagnetic plasma between the slot cover 24 and the top of the new energy battery 10 also has good conductivity and can also remove some static electricity.

[0044] 4) Since the electromagnetic plasma can completely wrap the new energy battery 10, even if the surface of the new energy battery 10 is irregular, it can ensure that static electricity is effectively removed from each area thereof.

[0045] 5) The main component of the electroconductive plasma is ferroferric oxide, which has a certain conductivity, but its conductivity is limited, and it usually needs to be used in combination with other materials to improve its performance in practical applications. In addition, there are certain gaps / gaps between the conductive particles of the electroconductive plasma itself. Even if copper powder is used for filling, its conductivity in fluid form is still limited; therefore, when antistatic testing is required, the static electricity generated by the electrostatic generator will be partly transmitted through the electroconductive plasma in the fluid state, but most of it will be left behind, so that the static electricity accumulated in the new energy battery 10 can reach a peak value, which is convenient for subsequent antistatic testing.

[0046] 6) When the present invention is applied to an actual battery pack, it provides a method for the automatic static electricity removal design of the new energy battery 10. For example, by eliminating the setting of the megasonic vibrator 50, the high-frequency vibration generated during the driving of the vehicle body can be used to remove a portion of the static electricity in the new energy battery 10. The only difference is that the amount of charge removed each time is not as good as that in Example 1, which can effectively avoid the accumulation of a large amount of static electricity in the new energy battery 10.

[0047] In this embodiment, since the focus is on using the conductive magnetic plasma near the leaf spring 30 as a conductive path, a magnetic strip 303 is provided.

[0048] On the other hand, due to the long-term vibration resistance test, a large amount of copper powder will accumulate in the area very close to the bottom of the conductive slot 25; and the copper cover is provided with a magnetic strip 303 and an elliptical hollow hole 302, which can delay the accumulation of copper powder to a certain extent, and the replacement cycle of the conductive magnetic slurry can be extended by about 35% (relative to not providing a magnetic strip 303). If the accumulation of copper powder is too large, it can be judged by the difference in E values ​​corresponding to the bottom of the conductive slot 25 and the slot cover 24. The difference between the two is ΔE. When ΔE≥0.25, it is necessary to pour out the conductive magnetic slurry in the conductive slot 25, and then stir and disperse it again.

[0049] Anti-static effect test

[0050] 1. Remove all battery packs in the existing new energy battery, install an electrostatic generator (±10kV DC), and obtain a simulated new energy battery; operate the electrostatic generator for 5 minutes to electrostatically charge the outer shell of the simulated new energy battery.

[0051] 2. Install Trek series electrometers in different areas of the conductive slot 25 to measure the pulse current passing through the electrometer. The time domain diagram formed by the current value of the pulse current and time is integrated to obtain E; the E value is directly proportional to the amount of charge passing through the electrometer. The larger the E value, the larger the charge amount of electrostatic discharge; when the initial charged charge amount is the same, the larger the E value, the better the static electricity removal effect.

[0052] In this embodiment (megasonic frequency is 2.7 MHz), the E value is E0 (the area near the megasonic vibrator 50), and the amount of static electricity passing through is estimated by an electrometer to be approximately 2.1 to 2.3C.

[0053] Correspondingly, during the same charge and discharge process, the E value measured from the slot cover 24 is E1, E 1 / E0=0.88, which is not much different, indicating that the static electricity removal performance at the slot cover 24 is also good.

[0054] In this embodiment, when the fluid-like electroconductive plasma is completely filled in the conductive slot 25, it only needs to be vibrated at a megasonic frequency of 0.8 MHz for 6 minutes. When performing the static electricity removal test later, the megasonic vibrator 50 only needs to vibrate at a megasonic frequency of 2.7 MHz for 3 to 5 seconds to complete the static electricity removal operation.

[0055] If the particle size of the copper powder is less than or equal to that of the ferroferric oxide powder, such as D90 of 9.3 μm, and the rest are the same, after the corresponding conductive electromagnetic plasma is completely filled in the conductive slot 25, the megasonic vibration is performed for 6 minutes at a megasonic frequency of 0.8 MHz, and the megasonic vibrator 50 only needs to vibrate for 5 seconds at a megasonic frequency of 2.7 MHz. The E value measured in the area close to the megasonic vibrator 50 is E2, and E 2 / E0=0.09;Only at the beginning, when the megasonic vibration exceeds 90min at the frequency band of 0.8MHz, the E value measured in the area close to the megasonic vibrator 50 is E3, E 3 / E0≥0.96.

[0056] During the test, both the megasonic vibrator and the ultrasonic vibrator were tested to test the corresponding E value under different high-frequency vibration frequencies. x (area near the megasonic oscillator 50), y = E x / E0, its curve is shown in Figure 3 ;Depend on Figure 3 It can be seen that, preferably, the high frequency vibration frequency is 2.7 MHz. Figure 3 It can be seen that the high-frequency vibration frequency can not only make the conductive electromagnetic plasma "hard", but more importantly, it can make it resonate with the copper powder in the conductive electromagnetic plasma environment.

[0057] For reference, if the oil-based medium is replaced with water, the final y=0.13.

[0058] Example 2

[0059] When the new energy battery 10 is very large, in order to meet the heat dissipation requirements, water cooling technology is generally used inside it; for example, a heat exchange channel is arranged inside the new energy battery 10, and a flexible hose 11 connected to the heat exchange channel is arranged on the outside of the new energy battery 10, and a pipe joint 22 is arranged on the outside of the conductive groove 25, and the flexible hose 11 is connected to the pipe joint 22.

[0060] The tough hose 11 is preferably a polyurethane elastic hose, which is a high-elasticity and high-toughness hose and has good comprehensive properties such as pressure resistance and wear resistance during use.

[0061] Because the new energy battery 10 is very large and heavy, in order to maintain its stability during vibration, on the one hand, the flexible hose 11 around the new energy battery 10 can also restrain the new energy battery 10 within a certain range to prevent it from colliding with the side wall of the conductive slot 25. On the other hand, the cooling water source can be connected to the pipe joint 22, so that the cooling water can enter and exit the heat exchange channel to dissipate heat.

[0062] Example 3

[0063] In order to facilitate installation and reserve installation space for the megasonic vibrator 50 , an angle seat 23 is further installed below the bottom of the conductive slot 25 .

[0064] Example 4

[0065] The difference between this example and Example 1 is that the oil-based medium of this example uses methanol as a reactant instead of ethanol, and the rest is the same.

[0066] Example 5

[0067] The difference between this example and Example 1 is that the oil-based medium of this example uses soybean oil as a reactant instead of linseed oil, and the rest is the same.

[0068] Example 6

[0069] The difference between this example and Example 1 is that in this example, the first product is directly subjected to reduced pressure distillation at 100° C. for 20 minutes to obtain the oil-based medium, and the rest are the same.

[0070] Example 7

[0071] The difference between this example and Example 1 is that this example directly uses glycerin as the oil-based medium, and the rest is the same.

[0072] Example 8

[0073] The difference between this example and Example 1 is that this example directly uses linseed oil as the oil-based medium, and the rest is the same.

[0074] Shot put test

[0075] Pour the conductive magnetic plasma into a megasonic tank (a megasonic vibrator is installed at the bottom of the iron tank, and a magnet block with the same magnetic field strength as in Example 1 is installed). Put a lead ball with a diameter of 2 cm 2 meters away from the surface of the conductive magnetic plasma.

[0076] Taking the conductive electromagnetic plasma in Example 1 as an example, when the megasonic oscillator is not started, the lead ball falls and quickly sinks into the conductive electromagnetic plasma, which indicates that the conductive electromagnetic plasma exhibits fluid properties at this time; but when the megasonic oscillator is started, its megasonic frequency is 2.7 MHz, and the lead ball falls again. The lead ball will bounce on the surface of the conductive electromagnetic plasma and ultimately fail to sink into the conductive electromagnetic plasma; this indicates that the conductive electromagnetic plasma exhibits solid-like properties at this time.

[0077] In the case of the electromagnetic plasma in Example 4, when the megasonic frequency was 2.7 MHz, it was found that some small mud balls on the surface of the electromagnetic plasma continuously vibrated, while the electromagnetic plasma in Example 1 did not have such a phenomenon when the megasonic vibration occurred, indicating that the electromagnetic plasma in Example 1 was more stable.

[0078] The electro-conductive plasma in Example 5, when the megasonic vibrator is started, the megasonic frequency is 2.7 MHz, and the shot put is not completely immersed in the electro-conductive plasma when it falls from 2 m; however, when the shot put falls from 3.6 m, it is completely immersed in the electro-conductive plasma; this shows that although the electro-conductive plasma in Example 5 can exhibit solid-like properties under the action of high-frequency vibration; however, the electro-conductive plasma in Example 1 is harder under the action of high-frequency vibration.

[0079] When the megasonic oscillator of the electromagnetic conductive plasma in Examples 6, 7 and 8 is started, the megasonic frequency is 2.7 MHz, and the lead ball falls and quickly sinks into the electromagnetic conductive plasma, which indicates that the electromagnetic conductive plasma in Examples 6, 7 and 8 does not exhibit solid-like properties at this time.

[0080] In addition, it should be understood that those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A new energy battery module, comprising a new energy battery (10), characterized in that: The new energy battery (10) is covered with a conductive shell on its exterior, the conductive shell comprising a conductive slot (25) and a slot cover (24), a leaf spring (30) being arranged between the bottom of the new energy battery (10) and the bottom of the conductive slot (25); an annular channel (21) being arranged between the conductive shell and the new energy battery (10), the interior of the annular channel (21) being filled with conductive plasma; and a megasonic vibrator (50) being installed below the bottom of the conductive slot (25).

2. A new energy battery module according to claim 1, characterized in that: A heat exchange channel is arranged inside the new energy battery (10), a flexible hose (11) connected to the heat exchange channel is arranged outside the new energy battery (10), a pipe joint (22) is arranged outside the conductive groove (25), and the flexible hose (11) is connected to the pipe joint (22).

3. A new energy battery module according to claim 1, characterized in that: The leaf spring (30) comprises at least three arc-shaped elastic plates, the arc lengths of the elastic plates being arranged to decrease in proportion from top to bottom, and all the elastic plates being fastened with metal hoops; the two ends of the elastic plate on the top layer are rotatably connected to a rotating drum (31), the bottom of the new energy battery (10) is provided with a limiting groove arranged along the length direction of the new energy battery (10), the upper end of the rotating drum (31) is located in the limiting groove, and a clearance fit is formed between the upper end of the rotating drum (31) and the limiting groove; the middle part of the elastic plate on the bottom layer is fixedly connected to the bottom of the conductive groove (25).

4. A new energy battery module according to claim 3, characterized in that: The width of the elastic plate (301) is arranged to decrease in equal proportion from top to bottom; a plurality of elliptical hollow holes (302) are arranged on the surface of the elastic plate (301); the length direction of the hollow holes (302) is arranged parallel to the width direction of the elastic plate (301); a magnetic strip (303) is installed at the center of the hollow hole (302); the length direction of the magnetic strip (303) is arranged parallel to the width direction of the elastic plate (301).

5. A new energy battery module according to claim 1, characterized in that: The electromagnetic slurry is composed of ferroferric oxide powder, copper powder and oil-based medium mixed in a mass ratio of 55:20:(23-27).

6. A new energy battery module according to claim 5, characterized in that: The D90 of the ferroferric oxide powder is less than or equal to 10 μm, the particle size of the copper powder is larger than that of the ferroferric oxide powder, and the D90 of the copper powder is 75 to 85 μm.

7. A new energy battery module according to claim 1, characterized in that: The bottom of the conductive slot (25) and the area close to the megasonic vibrator (50) are all electrically connected to a grounding wire.

8. A new energy battery module according to claim 1, characterized in that: The megasonic frequency of the megasonic vibrator (50) is 2.7 MHz.

9. A new energy battery module according to claim 3, characterized in that: The elastic plates are provided in three pieces.

10. A new energy battery module according to claim 1, characterized in that: An angle seat (23) is also installed below the bottom of the conductive slot (25).

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