CN216250905U - Battery and electric equipment - Google Patents
Battery and electric equipment Download PDFInfo
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- CN216250905U CN216250905U CN202122886274.3U CN202122886274U CN216250905U CN 216250905 U CN216250905 U CN 216250905U CN 202122886274 U CN202122886274 U CN 202122886274U CN 216250905 U CN216250905 U CN 216250905U
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a battery and electric equipment, wherein the battery comprises: a housing, the housing comprising: the end plate is arranged at the end part of the shell, a through hole is formed in the end plate, and the through hole is formed in the center of the end plate; the explosion-proof valve is arranged at the through hole. Wherein, with the center department of explosion-proof valve setting at the end plate, replaced the eccentric border position of original installation at the end plate, can effectually alleviate the explosion-proof valve and receive the risk that causes the too big emergence weeping of battery internal pressure after assaulting easily in drop test, and locate the explosion-proof valve in the through-hole, can also dodge the equipment of battery surrounding part when reducing outside occupation space, effectual protection explosion-proof valve does not receive external destruction, corrode, guarantee explosion-proof valve function normal, thereby guarantee and improve the security performance of the explosion-proof pressure release of battery.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery and electric equipment.
Background
In order to ensure the safety of the battery, an explosion-proof valve is generally mounted on the top cover of the battery. When the battery is in accident due to improper charging and discharging, short circuit or exposure to severe environments such as high temperature and the like, the high-energy battery can generate a large amount of gas, the temperature is rapidly increased, and the gas rushes the explosion-proof valve to achieve the purpose of pressure relief, so that the safety performance of the battery is greatly improved due to the existence of the explosion-proof valve.
In the related art, the explosion-proof valve used by the battery is often installed at the eccentric edge position of the battery top cover with the pole, and when the battery drops in a drop test or accidentally, the explosion-proof valve close to the edge is easy to be impacted to cause the risk of leakage, thereby affecting the safety performance of the battery.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a battery, and the explosion-proof valve is arranged at the center of the battery end plate, so that the risk of liquid leakage after the explosion-proof valve close to the edge is easily impacted in a drop test can be effectively relieved.
The utility model further provides the electric equipment.
According to an embodiment of the first aspect of the utility model, the battery includes: a housing, the housing comprising: the end plate is arranged at the end part of the shell, a through hole is formed in the end plate, and the through hole is formed in the center of the end plate; the explosion-proof valve is arranged at the through hole.
According to the battery provided by the embodiment of the utility model, the explosion-proof valves are arranged at the center of the end plate and in the through holes at the center, so that the risk of leakage caused by overlarge internal pressure of the battery after the explosion-proof valves are easily impacted in a drop test can be effectively relieved, the explosion-proof valves can avoid the assembly of parts around the battery while reducing the external occupied space, the explosion-proof valves can be effectively protected from being damaged and corroded by the outside, the normal functions of the explosion-proof valves are ensured, and the safety performance of explosion-proof and pressure relief of the battery is ensured and improved.
According to some embodiments of the utility model, the explosion-proof valve comprises: the mounting part is annular, the portion of reducing set up in the inboard of mounting part and thickness are less than the thickness of mounting part.
According to some embodiments of the utility model, the thickness of the thinned portion is h1, and h1 satisfies the relation: h1 is not less than 0.4mm and not more than 0.5 mm.
According to some embodiments of the utility model, the thickness of the mounting portion is h2, and h2 satisfies the relationship: h2 is more than or equal to 1mm and less than or equal to 2 mm.
According to some embodiments of the utility model, the thinned portion comprises: the first thinning section and the second thinning section are connected between the first thinning section and the mounting portion, the first thinning section faces towards the inner portion of the through hole and protrudes out of the through hole, and the second thinning section faces towards the outer portion of the through hole.
According to some embodiments of the utility model, the via comprises: the first hole section is communicated with the second hole section, a first installation step is formed between the first hole section and the second hole section, the installation part is arranged on the first installation step, and the thinning portion and the second hole section are oppositely arranged.
According to some embodiments of the utility model, the mounting portion is welded to the first mounting step.
According to some embodiments of the utility model, further comprising: a seal, the through-hole further comprising: and the third hole section is communicated with the second hole section and is arranged on one side, deviating from the first hole section, of the second hole section, a second mounting step is formed between the third hole section and the second hole section, and the edge of the sealing element is arranged on the second mounting step.
According to some embodiments of the utility model, the seal is provided with an air hole.
The electric equipment according to the second aspect of the embodiment of the utility model comprises the battery of the above embodiment.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of a battery according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a battery according to an embodiment of the utility model;
FIG. 3 is a schematic structural view of an explosion-proof valve according to an embodiment of the utility model;
fig. 4 is a partial schematic view a of fig. 2.
Reference numerals:
a battery 100;
a housing 10; a housing 11; an end plate 12; a through hole 13; a first bore section 13 a; a second bore section 13 b; a third bore section 13 c; a first mounting step 14; a second mounting step 15; a seal member 16; air holes 17;
an explosion-proof valve 20; the thinned portion 21; a mounting portion 22; a first thinning section 23; a second thinned section 24.
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
A battery 100 according to an embodiment of the first aspect of the present invention is described below with reference to fig. 1 to 4, the battery 100 including: a housing 10 and an explosion-proof valve 20. The housing 10 can protect the battery 100 from dust or water mist, so that the battery 100 can be used normally.
Also, the housing 10 includes: a housing 11 and an end plate 12; an end plate 12 is provided at an end portion of the case 11, a through hole 13 is provided on the end plate 12, and the through hole 13 is provided at a center of the end plate 12, and an explosion-proof valve 20 is provided at the through hole 13. That is to say, shell 10 comprises casing 11 and end plate 12, end plate 12 is established at the tip of casing 11, it has through-hole 13 to open in the center department of end plate 12, and explosion-proof valve 20 locates through-hole 13 department, so set up, the mounting means of explosion-proof valve 20 at the eccentric border position of end plate 12 has been replaced, on the one hand can effectually avoid being close to the explosion-proof valve 20 at the edge and receiving the impact after falling easily, cause the too big risk that takes place the weeping of battery 100 internal pressure, on the other hand can reduce outside occupation space, can also dodge the equipment of battery 100 surrounding parts simultaneously, can effectual protection explosion-proof valve 20 not receive external destruction, corruption, guarantee explosion-proof valve 20 function normal, thereby guarantee and improve the security performance of the explosion-proof pressure release of battery 100.
As shown in fig. 3 and 4, the explosion-proof valve 20 includes: a reduced thickness portion 21 and a mounting portion 22, the mounting portion 22 being annular, the reduced thickness portion 21 being disposed inside the mounting portion 22 and having a thickness smaller than that of the mounting portion 22. That is to say, explosion-proof valve 20 contains two parts of attenuate portion 21 and installation department 22, and wherein the installation department 22 of explosion-proof valve 20 is the loop configuration to with attenuate portion 21 encirclement at the inboard of installation department 22, so set up, through the installation department 22 of loop configuration and through-hole 13 cooperation, can be fine fix explosion-proof valve 20 at through-hole 13, be difficult to the risk that the weeping takes place in the drop test.
And, the thickness of the thinned portion 21 is smaller than the thickness of the mounting portion 22, so set up, when the air pressure in the battery 100 reaches the pressure relief value of the explosion-proof valve 20, the thinned portion 21 and the mounting portion 22 receive the pressure of the gas at the same time, because the thickness of the thinned portion 21 is smaller than the thickness of the mounting portion 22, have formed the potential energy difference of pressure, make the thinned portion 21 break outwards more easily, so as to make the explosion-proof valve 20 realize the pressure relief function, if the thickness of the thinned portion 21 is equal to or greater than the mounting portion 22, the gas pressure in the battery 100 is difficult to break the thinned portion 21, thus cause the explosion-proof valve 20 to be unable to relieve pressure in time, and then influence the safety performance and service life of the battery 100.
From this, through setting up explosion-proof valve 20 in the center department of battery 100 end plate 12, can effectually alleviate explosion-proof valve 20 and cause the too big risk of taking place the weeping of battery 100 internal pressure after receiving the impact easily in drop test, and locate explosion-proof valve 20 in through-hole 13, effectual protection explosion-proof valve 20 does not receive external destruction, corruption, guarantee explosion-proof valve 20 function normal, thereby guarantee and improve the security performance of the explosion-proof pressure release of battery 100, guaranteed personnel's life safety.
Wherein the thickness of the thinning part 21 is h1, and h1 satisfies the relation: h1 is not less than 0.4mm and not more than 0.5 mm. So set up, can make the thickness of portion of reducing 21 and the pressure release value of explosion-proof valve 20 match, produce a large amount of gases when battery 100 is inside, can make gaseous fine break the portion of reducing 21 to reach the purpose of explosion-proof valve 20 pressure release, thereby improve battery 100's security. If the thickness of the thinned portion 21 is less than 0.4mm, when the pressure of the gas does not reach the pressure relief value, the explosion-proof valve 20 may be relieved in advance, thereby causing the problems of high replacement frequency of the battery 100 and waste of product cost, and if the thickness of the thinned portion 21 is greater than 0.5mm, the explosion-proof valve 20 may not be relieved in time, so that the battery 100 has great harmfulness. Therefore, the thickness of the thinning part 21 is set between 0.4mm and 0.5mm, and the thinning part can be well matched with a pressure relief value, so that the purpose of timely pressure relief of the explosion-proof valve 20 is effectively realized.
The thickness of the mounting portion 22 is h2, and h2 satisfies the relation: h2 is more than or equal to 1mm and less than or equal to 2 mm. That is to say, the thickness of the mounting portion 22 is 2-4 times of the thickness of the thinning portion 21, and thus, on one hand, a significant pressure potential energy difference can be formed between the mounting portion 22 and the thinning portion 21 when the mounting portion and the thinning portion 21 are subjected to the pressure of the gas, so that the gas pressure can more easily burst through the thinning portion 21, on the other hand, the mounting portion 22 can be well fixed at the through hole 13, and the requirements on the rigidity and the strength of the mounting portion 22 are met, and therefore, the thickness of the mounting portion 22 plays a key role in whether the explosion-proof valve 20 can timely release the pressure.
Therefore, the thickness of the mounting portion 22 and the thickness of the thinning portion 21 affect the pressure relief function of the explosion-proof valve 20, and only when the thickness of the mounting portion 22 and the thickness of the thinning portion 21 satisfy the requirement of the above relation, the explosion-proof valve 20 can be relieved in time when the gas pressure reaches the pressure relief value, so as to avoid the explosion of the battery 100.
As shown in fig. 3 and 4, the thinned portion 21 includes: a first thinning section 23 and a second thinning section 24, the second thinning section 24 being connected between the first thinning section 23 and the mounting portion 22. That is, the thinning portion 21 is divided into a first thinning section 23 and a second thinning section 24, which are respectively annular, so that the explosion-proof valve 20 forms a three-ring structure, and the first thinning section 23, the second thinning section 24 and the mounting portion 22 are arranged in sequence from the inner ring to the outer ring, and are in transition connection through arcs.
And the first thinned section 23 protrudes inward toward the through hole 13, and the second thinned section 24 protrudes outward toward the through hole 13. Namely, along the vertical direction of the through hole 13, the first thinning section 23 protrudes towards the lower part of the through hole 13, and the second thinning section 24 protrudes towards the upper part of the through hole 13, so that the first thinning section 23 towards the through hole 13 is easier to elastically deform, gas is easier to break through the first thinning section 23, and the part of the second thinning section 24 towards the outside of the through hole 13 plays a certain stress buffering role. If the thickness reduction portion 21 is provided with the protruding structure only toward the lower side of the through hole 13, the explosion-proof valve 20 is easily broken upon receiving the gas pressure, and if the thickness reduction portion 21 is provided with the protruding structure only toward the upper side of the through hole 13, the gas pressure hardly pushes the explosion-proof valve 20 open, so that the function of explosion-proof and pressure relief of the explosion-proof valve 20 is lost. Therefore, the structure that the thinning part 21 protrudes vertically can well release the pressure of the explosion-proof valve 20.
Further, the through hole 13 includes: the first hole section 13a and the second hole section 13b, the first hole section 13a and the second hole section 13b are communicated, a first installation step 14 is formed between the first hole section 13a and the second hole section 13b, the installation portion 22 is arranged on the first installation step 14, and the thinning portion 21 is arranged opposite to the second hole section 13 b. That is, the mounting portion 22 is provided on the first mounting step 14 of the first bore section 13a, and the protruding reduced thickness portion 21 is disposed opposite to the second bore section 13b with respect to the mounting portion 22, so that the mounting portion 22 can be firmly fixed on the first mounting step 14, and when a certain degree of gas pressure acts on the reduced thickness portion 21, due to the arrangement of the first mounting step 14, a stress concentration is generated at a connection portion of the mounting portion 22 and the reduced thickness portion 21, and the connection portion of the reduced thickness portion 21 and the mounting portion 22 is more easily broken, so that the gas can be well burst through the reduced thickness portion 21, and thus, the arrangement of the first mounting step 14 plays a key role in normal pressure relief of the explosion-proof valve 20.
Also, the mounting portion 22 may be welded to the first mounting step 14. The installation part 22 is fixed on the first installation step 14 in a welding mode, so that on one hand, the installation part 22 and the first installation step 14 can be connected more tightly to form an integral structure, the connection effect of the installation part 22 and the thinning part 21 is weakened when the explosion-proof valve is subjected to air pressure, the thinning part 21 can be broken by the air well, and the normal use of the explosion-proof valve 20 is further realized; on the other hand, the explosion-proof valve 20 can be firmly installed in the through hole 13, the problem that liquid leakage occurs due to the fact that the internal pressure of the battery 100 is too large when the battery 100 is subjected to drop test or accidentally drops is avoided, the normal function of the explosion-proof valve 20 is effectively guaranteed, and therefore the safety performance of explosion-proof pressure relief of the battery 100 is guaranteed and improved. Specifically, the welding mode can be spot welding, full welding and other process operations, and the explosion-proof pressure relief function of the explosion-proof valve 20 can be effectively realized.
In addition, the mounting portion 22 may be fixed to the first mounting step 14 by means of bolts or rivets, which also has a certain effect on breaking the thinned portion 21 by air pressure, but the welding method is preferred, which not only can realize the relief of the explosion valve 20, but also can save the product cost.
As shown in fig. 4, the through hole 13 further includes a sealing member 16, that is, the sealing member 16 is disposed at the through hole 13 to prevent dust and mist from directly contacting the explosion-proof valve 20, so that the explosion-proof valve 20 can be well decompressed. In addition, the sealing member 16 may be made of a plastic material, so that the cost of the product can be reduced, and the price advantage of the product at the market end can be improved.
Further, the through hole 13 further includes: a third bore section 13c, the third bore section 13c being in communication with the second bore section 13b, and the third bore section 13c being arranged on a side of the second bore section 13b facing away from the first bore section 13a, a second mounting step 15 being formed between the third bore section 13c and the second bore section 13b, an edge of the sealing element 16 being arranged at the second mounting step 15. That is to say, the through hole 13 is divided into three parts, the first hole section 13a, the second hole section 13b and the third hole section 13c are respectively arranged along the direction from top to bottom, a second mounting step 15 is formed between the second hole section 13b and the third hole section 13c, the sealing member 16 is fixed on the second mounting step 15, the sealing member 16 can be well fixed on the second mounting step 15, the third hole section 13c of the through hole 13 is subjected to edge-covering compression joint through the edge of the sealing member 16, and the sealing effect of the through hole 13 and the explosion-proof valve 20 is improved.
The seal 16 is provided with an air hole 17. That is, the sealing member 16 is provided with the air hole 17 communicated with the outside, so that when a large amount of gas is generated inside the battery 100 and the temperature is sharply increased, on one hand, a large pressure difference is formed between the gas inside the battery 100 and the atmospheric pressure of the outside, which is beneficial for the gas to better burst the explosion-proof valve 20, thereby realizing the pressure relief function; on the other hand, the air hole 17 can play a good buffering role, and the problem that the components around the battery 100 are damaged or personnel are injured due to the fact that a large impact force is caused by instant rupture of the explosion-proof valve 20 is avoided.
Further, the sealing member 16 is provided with the air hole 17, so that explosion-proof pressure relief of the battery 100 can be realized. After the gas breaks through the sealing element 16 of the explosion-proof valve 20, the sealing element 16 of the explosion-proof valve 20 is replaced, and the explosion-proof valve 20 can be used for multiple times, so that resources are effectively saved.
Specifically, as shown in fig. 4, one air hole 17 may be provided, and is disposed in the center of the third hole section 13c, and is designed to match with a pressure relief value at which gas reaches a limit, so that explosion-proof pressure relief of the battery 100 can be effectively achieved, and safety of the battery 100 is improved. Of course, the number of the air holes 17 may be plural, and the plural air holes 17 are provided at intervals on the sealing member 16.
The electric device according to the second aspect of the embodiment of the present invention includes the battery 100 of the above-described embodiment. Through setting up explosion-proof valve 20 in the center department of battery 100 end plate 12, the eccentric border position of original installation at end plate 12 has been replaced, can effectually alleviate explosion-proof valve 20 and cause the too big risk of the emergence weeping of battery 100 internal pressure after receiving the impact easily in drop test, and locate explosion-proof valve 20 in through-hole 13, can also dodge the equipment of battery 100 surrounding parts when reducing outside occupation space, effectual protection explosion-proof valve 20 does not receive external destruction, corrode, guarantee explosion-proof valve 20 function normal, thereby guarantee and improve the security performance of the explosion-proof pressure release of battery 100, personnel's life safety has been guaranteed.
In the description of the present invention, it is to be understood that the terms "center", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A battery, comprising:
a housing, the housing comprising: the end plate is arranged at the end part of the shell, a through hole is formed in the end plate, and the through hole is formed in the center of the end plate;
the explosion-proof valve is arranged at the through hole.
2. The battery of claim 1, wherein the explosion-proof valve comprises: the mounting part is annular, the portion of reducing set up in the inboard of mounting part and thickness are less than the thickness of mounting part.
3. The battery according to claim 2, wherein the thickness of the thinned portion is h1, and h1 satisfies the relationship: h1 is not less than 0.4mm and not more than 0.5 mm.
4. The battery according to claim 3, wherein the thickness of the mounting portion is h2, and h2 satisfies the relationship: h2 is more than or equal to 1mm and less than or equal to 2 mm.
5. The battery according to claim 2, wherein the thinned portion includes: the first thinning section and the second thinning section are connected between the first thinning section and the mounting portion, the first thinning section faces towards the inner portion of the through hole and protrudes out of the through hole, and the second thinning section faces towards the outer portion of the through hole.
6. The battery of claim 2, wherein the via comprises: the first hole section is communicated with the second hole section, a first installation step is formed between the first hole section and the second hole section, the installation part is arranged on the first installation step, and the thinning portion and the second hole section are oppositely arranged.
7. The battery of claim 6, wherein the mounting portion is welded to the first mounting step.
8. The battery of claim 6, further comprising: a seal, the through-hole further comprising: and the third hole section is communicated with the second hole section and is arranged on one side, deviating from the first hole section, of the second hole section, a second mounting step is formed between the third hole section and the second hole section, and the edge of the sealing element is arranged on the second mounting step.
9. The cell defined in claim 8, wherein the seal is provided with air holes.
10. An electrical device comprising the battery of any one of claims 1-9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122185995 | 2021-09-10 | ||
| CN2021221859951 | 2021-09-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216250905U true CN216250905U (en) | 2022-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122886274.3U Active CN216250905U (en) | 2021-09-10 | 2021-11-23 | Battery and electric equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216250905U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023159840A1 (en) * | 2022-02-28 | 2023-08-31 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, and electrical device |
-
2021
- 2021-11-23 CN CN202122886274.3U patent/CN216250905U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023159840A1 (en) * | 2022-02-28 | 2023-08-31 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, and electrical device |
| WO2023159847A1 (en) * | 2022-02-28 | 2023-08-31 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, and electrical apparatus |
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Address after: 361100 201-1, complex building 5, No. 11, Butang Middle Road, torch high tech Zone (Tongxiang) industrial base, Xiamen, Fujian Province Patentee after: Xiamen Haichen Energy Storage Technology Co.,Ltd. Address before: Room 201-1, Comprehensive Building 5#, No. 11, Butang Middle Road, Industrial Base, Xiamen Torch High-tech Zone (Tongxiang), Xiamen City, Fujian Province, 361012 Patentee before: Xiamen Haichen New Energy Technology Co.,Ltd. |