Protection assembly, power battery and electric vehicle

Abstract

The utility model provides a protection assembly, a power battery and an electric vehicle. According to the power battery, the protection assembly is connected with the battery body, the protection assembly comprises the fixing support and the protection plate, the fixing support is used for covering the battery body, and the protection plate is installed on the inner side of one end of the fixing support. A first slag channel is formed in the periphery of the other end of the fixing support, surrounds the protection plate and is used for being communicated with the outer side. When the battery is subjected to thermal runaway, slag generated by the battery main body can flow through the first slag channel and is discharged to the outer side, so that battery explosion caused by accumulation of the slag in the battery main body can be avoided, and the safety of the battery is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of power batteries, in particular to a protection component, a power battery and an electric vehicle. Background Art

[0002] With the strong development and support of the state for the new energy industry, electric bicycles have become an indispensable means of transportation for many people. However, electric bicycle battery failures have frequently caused fires, and it has become an urgent task to strengthen the safety management of electric bicycles.

[0003] The prior art, such as the Chinese patent with the patent number CN114678645A, proposes a lithium battery intelligent thermal control explosion-proof safety protection device. The above patent includes an outer protective shell, an inner protective shell, an explosion-proof heat exchange module, a temperature controller, a three-color warning light and a buzzer installed on the top surface of the outer protective shell. A temperature sensor is fixed on the inner side surface of the inner protective shell. A heating resistance wire is coiled and installed on the outer side surface of the inner protective shell, and a semiconductor refrigeration sheet connected to the explosion-proof heat exchange module is fixed. A safety detachment module is arranged on the outer side of the outer protective shell. The safety detachment module has a spring for throwing the lithium battery away from the vehicle in the state of lithium battery explosion and combustion. The three-color warning light and the buzzer are both connected to the temperature controller by wires, and the temperature controller receives and processes the signals of the temperature sensor.

[0004] However, for the lithium battery intelligent thermal control explosion-proof safety protection device in the prior art, after the battery undergoes thermal runaway, the internal materials of the battery melt at high temperature to form slag, and there is a problem that the slag cannot flow or be discharged. The internal pressure will rapidly increase, increasing the risk of battery explosion, which undoubtedly greatly reduces the safety of the battery. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a protection component, a power battery and an electric vehicle with relatively high safety.

[0006] The purpose of the utility model is realized by the following technical solutions:

[0007] The protection component includes a fixing bracket and a protection plate. The fixing bracket is used to cover the battery body, and the protection plate is installed on the inner side of one end of the fixing bracket;

[0008] A first slag channel is formed at the periphery of the other end of the fixing bracket. The first slag channel surrounds the protection plate and is used to communicate with the outside.

[0009] In one embodiment, an installation groove is opened at one end of the fixing bracket, one end of the protection plate is movably abutted in the installation groove, and the protection plate is detachably connected to the fixing bracket.

[0010] In one embodiment, the fixing bracket further includes a plurality of first bolt members and a plurality of screwed columns, and the protection plate is provided with a plurality of first through holes;

[0011] Each of the screwed columns is provided with a first screwed hole, and one end of each of the first bolt members passes through the corresponding first through hole and is screwed to the corresponding first screwed hole.

[0012] In one embodiment, a protective glue layer is coated on the electronic components of the protection plate.

[0013] A power battery includes a battery main body and the protection assembly according to any one of the above embodiments;

[0014] The battery main body includes a housing and a module. The housing forms a receiving groove, the module is located in the receiving groove, the fixing bracket covers the housing, and the fixing bracket is detachably connected to the housing.

[0015] In one embodiment, the battery main body further includes a heat insulation sheet, and the heat insulation sheet is disposed on a side of the module adjacent to the fixing bracket;

[0016] The fixing bracket is provided with a plurality of second bolt members, the fixing bracket is provided with a plurality of second through holes, and the housing is provided with a plurality of second screwed holes. Each of the second bolt members passes through the corresponding second through hole and is screwed to the corresponding second screwed hole.

[0017] In one embodiment, there is a reserved gap between the protection assembly and the heat insulation sheet.

[0018] In one embodiment, the battery main body further includes a plurality of boss members, and the plurality of boss members are spaced apart on a side of the heat insulation sheet adjacent to the fixing bracket, and each of the boss members abuts against the protection assembly.

[0019] In one embodiment, an electric vehicle includes the power battery according to any one of the above embodiments.

[0020] Compared with the prior art, the present utility model has at least the following advantages:

[0021] By setting up a protection component to connect to the battery body, the protection component includes a fixed bracket and a protection plate. The fixed bracket is used to cover the battery body, and the protection plate is installed on the inner side of one end of the fixed bracket. A first slag channel is formed on the periphery of the fixed bracket. The first slag channel is arranged to surround the projected area of the protection plate on the other end of the fixed bracket, and the first slag channel is used to communicate with the outside. When the battery undergoes thermal runaway, the slag generated by the battery body can flow through the first slag channel and be discharged to the outside. In this way, the accumulation of slag in the battery body leading to battery explosion can be avoided, thereby effectively improving the safety of the battery. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0023] Figure 1 Schematic structural diagram of a power battery in an embodiment;

[0024] Figure 2 is Figure 1 Exploded schematic structural diagram of the power battery shown;

[0025] Figure 3 is Figure 1 Partial schematic diagram of the protection component in the power battery shown;

[0026] Figure 4 is Figure 3 Schematic structural diagram of the protection component from another perspective shown;

[0027] Figure 5 is Figure 3 Exploded schematic structural diagram of the protection component shown;

[0028] Figure 6 is Figure 5 Enlarged schematic diagram of part A of the protection component shown;

[0029] Figure 7 is Figure 5 Enlarged schematic diagram of part B of the protection component shown;

[0030] Reference numerals: protection component 10; power battery 20; fixing bracket 100; protection plate 200; first slag channel 101; installation groove 102; first bolt member 110; screw post 120; first screw hole 1201; first through hole 201; battery body 300; housing 310; module 320; accommodation groove 3101; heat insulation sheet 330; second bolt member 130; second through hole 103; second screw hole 3102; boss member 340. Detailed implementation manner

[0031] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present utility model can be understood more thoroughly and comprehensively.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0034] Please refer to Figures 1 to 7 , for a better understanding of the protection component of the present disclosure, the protection component is further explained as follows:

[0035] A protection component 10 for connecting a battery body 300, the protection component 10 includes a fixing bracket 100 and a protection plate 200. The fixing bracket 100 is used to cover the battery body 300, and the protection plate 200 is installed on the inner side of one end of the fixing bracket 100. A first slag channel 101 is formed on the periphery of the other end of the fixing bracket 100. The first slag channel 101 surrounds the protection plate 200 and is used to communicate with the outside.

[0036] In this embodiment, by arranging the protection component 10 to be connected to the battery body 300, the protection component 10 includes a protection board 200 and a fixing bracket 100. A first slag channel 101 is formed at the periphery of the other end of the fixing bracket 100. The first slag channel 101 is arranged around the protection board 200 and is used to communicate with the outside. When the battery 20 undergoes thermal runaway, the ejected slag can flow and be discharged through the first slag channel 101, avoiding the accumulation of slag, thereby preventing the internal pressure of the battery 20 from being too high and causing an explosion, and effectively improving the safety of the battery 20.

[0037] It should be noted that in this embodiment, the fixing bracket 100 is also provided with a plurality of through holes communicating with the first slag channel 101, and the through holes can discharge the slag flowing in the first slag channel 101 to the outside.

[0038] It should be further noted that several electronic components are provided in the protection board 200, and a sensor is included in the several electronic components. The sensor can monitor the abnormal temperature of the battery body 300. At the same time, a buzzer is also arranged in the battery body 300. The buzzer is communicatively connected to the sensor. When the battery 20 is in an abnormal state, the sensor can sense the abnormality inside the battery 20 and transmit a signal to the buzzer. The buzzer receives the signal and gives an alarm to remind the user, thereby preventing harm to the user's personal safety.

[0039] As Figure 5 and Figure 7 shown, in one of the embodiments, an installation groove 102 is formed at one end of the fixing bracket 100. One end of the protection board 200 is movably abutted in the installation groove 102, and the protection board 200 is detachably connected to the fixing bracket 100.

[0040] It can be understood that by forming the installation groove 102 in the fixing bracket 100, the protection board 200 can be accommodated in the fixing bracket 100, so that the fixing bracket 100 can fix the protection board 200 in the battery 20. And when the battery body 300 undergoes thermal runaway, the fixing bracket 100 can prevent dangerous sources such as slag from directly acting on the protection board 200, and prevent situations such as short circuit and damage of the protection board 200 from occurring. In this way, the fixing bracket 100 can play a protective role for the protection board 200. Since the protection board 200 and the fixing bracket 100 are detachably connected, during the subsequent use of the battery 20, the inspection and adjustment of the protection board 200 are more simple and fast, thereby reducing the inspection time and inspection cost of the battery 20.

[0041] As Figure 3 、 Figure 5 、 Figure 6 and Figure 7As shown, in one embodiment, the fixing bracket 100 further includes a plurality of first bolt members 110 and a plurality of screw columns 120. The protection plate 200 is provided with a plurality of first through holes 201. Each screw column 120 is provided with a first screw hole 1201, and one end of each first bolt member 110 passes through the corresponding first through hole 201 and is screwed with the corresponding first screw hole 1201. It can be understood that by screwing the first bolt member 110 through the first through hole 201 formed in the protection plate 200 and the screw column 120 on the fixing bracket 100, the protection plate 200 is locked and fixed on the fixing bracket 100, making the connection between the protection plate 200 and the fixing bracket 100 closer and more reliable, and making the subsequent disassembly and maintenance process of the protection component 10 more convenient, thus effectively enhancing the maintainability of the protection component 10.

[0042] As Figure 3 and Figure 5 As shown, in one embodiment, a protective glue layer is coated on the electronic components on the protection plate 200. It should be noted that the protective glue layer uses flame-retardant glue to encapsulate the electronic components by potting. It can be understood that when the battery 20 undergoes thermal runaway and the molten slag ejected by it is discharged to the outside through the first molten slag channel 101, by potting the electronic components on the protection plate 200 with flame-retardant glue to form a protective glue layer, the molten slag is prevented from damaging the electronic components on the protection plate 200, that is, potting and encapsulating the electronic components on the protection plate 200 can effectively protect the electronic components on the protection plate 200.

[0043] Please refer to Figures 1 to 7 , the present disclosure also provides a power battery 20, and the following is a further explanatory description of the power battery 20:

[0044] A power battery 20 includes a battery main body 300 and the protection component 10 of any of the above embodiments. The battery main body 300 includes a housing 310 and a module 320. The housing 310 forms a receiving groove 3101, and the battery 20 package is located in the receiving groove 3101. The fixing bracket 100 covers the housing 310, and the fixing bracket 100 is detachably connected to the housing 310.

[0045] In this embodiment, a receiving groove 3101 is formed in the housing 310, and the battery pack 20 is located in the receiving groove 3101, so that the battery pack 20 is located in the housing 310. The housing 310 can reduce the influence of external factors on the battery 20. By providing a first slag channel 101 in the protection component 10, when the temperature of the battery main body 300 is abnormally out of control due to thermal runaway, the slag formed by the melting of the internal materials of the battery 20 at high temperature can flow through the first slag channel 101 and be discharged to the outside, thereby effectively reducing the internal pressure of the battery 20 and avoiding the occurrence of accidents such as explosion caused by the heat spread effect of slag accumulation inside the battery 20. In this way, the safety of the power battery 20 can be effectively enhanced.

[0046] As Figure 1 and Figure 2 shown, in one of the embodiments, the battery main body 300 further includes a heat insulation sheet 330, and the heat insulation sheet 330 is arranged on one side of the module 320 adjacent to the fixing bracket 100. The fixing bracket 100 is provided with a plurality of second bolt members 130, the fixing bracket 100 is provided with a plurality of second through holes 103, and the housing 310 is provided with a plurality of second screw holes 3102. Each second bolt member 130 passes through the corresponding second through hole 103 and is screwed to the corresponding first screw hole 1201.

[0047] It can be understood that by providing the heat insulation sheet 330, when one of the battery cells gets out of control due to heat, the heat insulation sheet 330 can isolate and prevent the influence of this battery cell on adjacent battery cells, thereby preventing or slowing down the occurrence of heat spread, and further improving the safety of the power battery 20. The fixing bracket 100 is provided with a plurality of second bolt members 130, the fixing bracket 100 is provided with a plurality of second through holes 103, and the housing 310 is provided with a plurality of second screw holes 3102. Each second bolt member 130 passes through the corresponding second through hole 103 and is screwed to the corresponding first screw hole 1201. Thus, the protection component 10 is fixed on the housing 310.

[0048] As Figure 1 , Figure 2 and Figure 3 shown, in one of the embodiments, there is a reserved gap between the protection component 10 and the heat insulation sheet 330. It can be understood that by reserving a gap between the protection component 10 and the heat insulation sheet 330, when the power battery 20 gets out of control due to heat, because there is a gap between the protection component 10 and the heat insulation sheet 330, the existence of the gap helps to disperse and spread the heat. The design of the gap enables the internal pressure of the power battery 20 to be gradually released through the reserved gap when the power battery 20 has an abnormal high temperature, so that the battery main body 300 can normally open the valve and release pressure when it can have an abnormal high temperature. In this way, it can prevent the power battery 20 from exploding due to excessive internal pressure, and further enhance the safety of the power battery 20.

[0049] As Figure 2 shown, in one embodiment, the battery body 300 further includes a plurality of boss members 340, which are spaced apart on the side of the heat insulation sheet 330 adjacent to the fixing bracket 100, and each boss member 340 abuts against the protection assembly 10 respectively.

[0050] It can be understood that each boss member 340 can support the protection assembly 10, so that the protection assembly 10 cannot be directly attached to the battery body 300, thereby forming a reserved space between the protection assembly 10 and the battery body 300. When the temperature inside the battery body 300 is abnormal, the reserved space can provide space for the release of the internal pressure of the battery 20, so that the battery 20 can normally open the valve and relieve pressure, avoiding explosion caused by excessive internal pressure of the battery 20 and improving the safety of the battery 20. And the reserved space is communicated with the first slag channel 101, so the slag generated by the thermal runaway of the battery 20 can flow through the reserved space and then flow to the first slag channel 101, avoiding the increase of the internal pressure of the battery 20 caused by slag accumulation and further improving the safety of the battery 20.

[0051] As Figure 1 and Figure 2 shown, in one embodiment, the number of the modules 320 is at least two, and there is a second slag channel between two adjacent modules 320. It can be understood that by providing a second slag channel between two adjacent modules 320, it is possible to prevent the slag from the thermal runaway of the battery 20 from accumulating and causing excessive pressure inside the battery 20 during the stacked arrangement of the modules 320. When one of the modules 320 gets out of control due to heat, the slag generated will flow and be discharged through the second slag channel, thereby avoiding the impact on other modules 320, that is, avoiding the occurrence of thermal spread phenomenon, and further effectively improving the safety of the power battery 20.

[0052] The present disclosure also provides an electric vehicle, including the power battery according to any one of the above embodiments.

[0053] In this embodiment, for the electric vehicle using the power battery of the present utility model, when the power battery undergoes thermal runaway, since the protection assembly is provided with a first slag channel, the slag of the power battery can flow and be discharged through the first slag channel, avoiding the explosion of the power battery caused by slag accumulation, thereby effectively enhancing the safety of the battery, that is, the electric vehicle.

[0054] Compared with the prior art, the present utility model has at least the following advantages:

[0055] The protection component is connected to the battery body by setting, and the protection component includes a fixed bracket and a protection plate. The fixed bracket is used to cover the battery body, and the protection plate is installed on the inner side of one end of the fixed bracket. A first slag channel is formed on the periphery of the fixed bracket. The first slag channel is arranged to surround the projected area of the protection plate on the other end of the fixed bracket, and the first slag channel is used to communicate with the outside. When the battery undergoes thermal runaway, the slag generated by the battery body can flow through the first slag channel and be discharged to the outside. In this way, the accumulation of slag in the battery body leading to battery explosion can be avoided, thereby effectively improving the safety of the battery.

[0056] The above embodiments only express several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A protection component for connecting to a battery body, characterized in that The protection component includes a fixing bracket and a protection plate; The fixing bracket is used to cover the battery body, and the protection plate is installed on the inner side of one end of the fixing bracket; A first slag channel is formed at the periphery of the other end of the fixing bracket, the first slag channel is arranged around the protection plate, and the first slag channel is used to communicate with the outside.

2. The protection component according to claim 1, characterized in that An installation groove is formed at one end of the fixing bracket, one end of the protection plate is movably abutted in the installation groove, and the protection plate is detachably connected to the fixing bracket.

3. The protection component according to claim 2, characterized in that, The fixing bracket further includes a plurality of first bolt members and a plurality of screw columns, and the protection plate is provided with a plurality of first through holes; Each screw column is provided with a first screw hole, and each first bolt member passes through the corresponding first through hole and is screwed with the corresponding first screw hole.

4. The protection component according to claim 1, characterized in that, A protective glue layer is coated on the electronic components of the protection plate.

5. A power battery, characterized in that, It includes a battery body and the protection component according to any one of claims 1 to 4; The battery body includes a housing and a module, a receiving groove is formed in the housing, the module is located in the receiving groove, the fixing bracket covers the housing, and the fixing bracket is detachably connected to the housing.

6. The power battery according to claim 5, characterized in that, The battery body further includes a heat insulation sheet, and the heat insulation sheet is arranged on the side of the module adjacent to the fixing bracket; The fixing bracket is provided with a plurality of second bolt members, the fixing bracket is provided with a plurality of second through holes, and the housing is provided with a plurality of second screw holes. Each second bolt member passes through the corresponding second through hole and is screwed with the corresponding second screw hole.

7. The power battery according to claim 6, characterized in that, There is a reserved gap between the protection component and the heat insulation sheet.

8. The power battery according to claim 6, wherein The battery body further includes a plurality of boss members, and the plurality of boss members are arranged at intervals on the side of the heat insulation sheet adjacent to the fixing bracket, and each boss member abuts against the protection component.

9. The power battery according to claim 5, characterized in that The number of the modules is at least two, and there is a second slag channel between two adjacent modules.

10. An electric vehicle, characterized in that, It includes the power battery according to any one of claims 5-9.

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