Battery cell monomer bracket, automobile battery pack and electric automobile

Abstract

The utility model discloses a battery cell monomer bracket, an automobile battery pack and an electric automobile, and relates to the field of batteries, the battery cell monomer bracket comprises two bracket frames which are oppositely arranged and an elastic connecting piece for connecting the two bracket frames together; the support frames are provided with battery cell grooves, one part of one battery cell monomer is located in the battery cell groove of one support frame, and the other part of the battery cell monomer is located in the battery cell groove of the other support frame. As the elastic connecting piece has pre-tightening force, the battery cell can be prevented from bulging.

Description

Technical Field

[0001] The utility model relates to the field of batteries, and in particular to a battery cell single body bracket, a car battery pack and an electric car. Background Art

[0002] The research and technical level in the field of new energy vehicles is constantly improving. As an important core component in automobiles, the automotive battery pack has higher and higher process requirements. For example, the battery cell temperature requirements: water cooling, heat pump TC, PI and other technical means to design constant temperature to achieve the required temperature of the battery cell. At the same time, the structure must add pre-tightening force and expansion gap to the battery cell. The expansion gap must have sufficient pre-tightening structure. This structure is corresponding to prevent the battery cell from bulging.

[0003] Conventional processes: epoxy board wrapping and glue filling, these two processes cannot achieve the preload required by the battery cell. In fact, there is no preload, and the battery cell process requirements cannot be met. This also has a discount rate, so the customer market cannot meet the battery cell requirements no matter how good the battery cell process is. However, this application identifies a battery cell single body bracket for fixing the battery cell. It can provide a better preload, thereby achieving the preload required by the battery cell. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a battery cell bracket, a vehicle battery pack and an electric vehicle. The battery cell can be limited by the accommodating cavities in the two bracket frames. Since the two separate bracket frames are connected by an elastic connecting piece, they not only have a pre-tightening function, but also have a certain expansion gap.

[0006] (II) Technical solution

[0007] In order to achieve the above object, the embodiment of the utility model adopts the following technical solution:

[0008] An embodiment of the utility model provides a battery cell bracket, comprising two relatively arranged bracket frames and an elastic connecting piece connecting the two bracket frames together; the bracket frame has a battery cell slot, a part of a battery cell is located in the battery cell slot of one bracket frame, and the other part is located in the battery cell slot in the other bracket frame.

[0009] Furthermore, the cell slot includes a first cell cell slot and a second cell cell slot; the support frame includes a first enclosure, a second enclosure, a partition and a connecting plate. Among them, the two first enclosures are arranged opposite to each other; the two second enclosures are arranged opposite to each other and are connected end to end with the two first enclosures at intervals; the two first enclosures and the two second enclosures enclose a receiving chamber; a plurality of partitions are arranged in the receiving chamber at intervals, and one end of the partition is connected to a first enclosure, and the other end of the partition is connected to another first enclosure. A plurality of connecting plates are arranged between the second enclosure and the adjacent partition, or between two adjacent partitions; the connecting plate and a part of the two opposite first enclosures and two adjacent partitions enclose the first cell cell slot; the connecting plate and a part of the two opposite first enclosures, a part of a second enclosure, and a partition enclose the second cell cell slot.

[0010] Furthermore, the battery cell support also includes a limiting plate, which is arranged around the bottom of the first battery cell slot and the bottom of the second battery cell slot.

[0011] Furthermore, the battery cell is provided with an explosion-proof valve, and a through hole is provided on the connecting plate, one through hole corresponds to one explosion-proof valve, and is used for allowing hot air discharged from the explosion-proof valve to flow through after the battery cell is heated.

[0012] Furthermore, the elastic connecting member is a binding belt, which is wrapped around the two support frames for at least one circle.

[0013] Furthermore, the battery cell bracket also includes a clamping plate, a protrusion and a clamping piece. One end of the clamping plate is connected to a second enclosure; the protrusion is connected to one side of the clamping plate; the clamping piece is provided with a connecting groove, a clamping groove is provided in the connecting groove, and the clamping piece is arranged on the outside of another second enclosure; the clamping plate on one bracket frame extends into the connecting groove of another bracket frame, and a protrusion is clamped in a clamping groove, and there is a gap between the protrusion and the inner wall of the clamping groove.

[0014] Furthermore, the protrusion has a first end and a second end, wherein the first end is connected to the clamping plate and the second end has an inclined surface.

[0015] On the other hand, an embodiment of the utility model further provides an automotive battery pack, comprising the above-mentioned battery cell holder and battery cells located in the battery cell holder.

[0016] On the other hand, an embodiment of the present invention further provides an electric vehicle, comprising the above-mentioned vehicle battery pack.

[0017] (III) Beneficial effects

[0018] The beneficial effects of the utility model are:

[0019] The utility model provides a battery cell bracket, a car battery pack and an electric car, wherein two bracket frames are connected by an elastic connector, and the battery cell can be arranged in a battery cell slot, namely a first battery cell slot and a second battery cell slot, so that when the battery cell is heated and has a certain expansion state, the elastic connector can allow a certain fault tolerance space between the battery cell and the bracket frame. And the elastic connector can also have a certain pre-tightening function through a certain elasticity, thereby fixing the two bracket frames together. The explosion-proof valve effectively releases the heat generated by thermal runaway of the battery cell. The limiting plate can further limit the battery cell to prevent the battery cell from flowing out. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the connection between the elastic connector and two bracket frames provided in an embodiment of the utility model;

[0021] Figure 2 The embodiment of the utility model provides Figure 1 Schematic diagram of the bracket frame in FIG.

[0022] Figure 3 A schematic diagram of the connection between the support frame and the battery cell provided in an embodiment of the utility model;

[0023] Figure 4 A schematic diagram of a plurality of battery cells provided in an embodiment of the utility model being fixed in two bracket frames;

[0024] Figure 5 The embodiment of the utility model provides Figure 1 Another schematic diagram of a bracket frame in FIG.

[0025] Figure 6 The embodiment of the utility model provides Figure 5 Schematic diagram of the connection between the card plate and the card connector. DETAILED DESCRIPTION

[0026] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0027] like Figure 1As shown, an embodiment of the utility model provides a battery cell bracket, including two relatively arranged bracket frames 1 and an elastic connecting member 2 connecting the two bracket frames 1 together; the bracket frame 1 has a battery cell slot 11, a part of a battery cell 100 is located in the battery cell slot 11 of one bracket frame 1, and the other part is located in the battery cell slot 11 in another bracket frame 1.

[0028] In this case, the two support frames 1 are connected by the elastic connector 2, and the cell 100 can be set in the cell slot 11. In this way, when the cell 100 is heated and has a certain expansion state, the elastic connector 2 can allow a certain fault tolerance space between the cell 100 and the support frame 1. The elastic connector 2 can also have a certain pre-tightening function through a certain elasticity, thereby fixing the two support frames 1 together.

[0029] The structure of the bracket frame 1 mentioned above is described below by way of example. Figures 2 to 4 As shown, in some embodiments of the present application, the cell slot 11 may include a first cell single cell slot 111 and a second cell single cell slot 112; the bracket frame 1 includes a first enclosure 12, a second enclosure 13, a partition 14 and a connecting plate 15. Among them, the two first enclosures 12 are arranged opposite to each other; the two second enclosures 13 are arranged opposite to each other and are spaced apart and connected end to end with the two first enclosures 12; the two first enclosures 12 and the two second enclosures 13 enclose an accommodating cavity; a plurality of partitions 14 are spaced apart in the accommodating cavity, and one end of the partition 14 is connected to one first enclosure 12, and the other end of the partition 14 is connected to another first enclosure 12. A plurality of connecting plates 15 are arranged between the second enclosure 13 and the adjacent partition 14, or between two adjacent partitions 14; the connecting plates 15 and a portion of two opposite first enclosures 12 and two adjacent partitions 14 form a first battery cell single groove 111; the connecting plates 15 and a portion of two opposite first enclosures 12, a portion of a second enclosure 13 and a partition 14 form a second battery cell single groove 112.

[0030] In this case, the first enclosure 12 and the second enclosure 13 can form a basic frame, and the partition 14 separates the accommodating cavity in the basic frame into second cell slots 112 on both sides and first cell slots 111 in the middle. The connecting plate 15 can restrict the cell 100 to prevent the cell 100 from flowing out.

[0031] like Figure 1 As shown, in some embodiments of the present application, the elastic connecting member 2 is a binding belt, which is wound around the two support frames 1 for at least one circle. The binding belt can be an adhesive tape.

[0032] like Figure 2As shown, in some embodiments of the present application, the cell holder may further include a limiting plate 16, which is disposed around the bottom of the first cell slot 111 and the bottom of the second cell slot 112. The limiting plate 16 can further limit the position of the cell 100 to ensure that the cell 100 is more stable.

[0033] like Figure 4 As shown, in some embodiments of the present application, the battery cell 100 may have an explosion-proof valve 101, and a through hole 151 is opened on the connecting plate 15, and one through hole 151 corresponds to one explosion-proof valve 101, which is used for the hot air flow discharged from the explosion-proof valve 101 to flow through after the battery cell 100 is heated.

[0034] Specifically, after the battery cell 100 has thermal runaway, the generated hot air flow will be discharged through the explosion-proof valve 101, and the hot air flow discharged from the explosion-proof valve 101 will pass through the through hole 151. The pressure inside the battery is released to prevent the battery from exploding during thermal runaway. Thermal runaway is the most serious safety accident for lithium-ion batteries. The electrical energy and chemical energy stored in the lithium-ion battery are released in large quantities in a short period of time. At the same time, a large amount of gas generated by the decomposition of the electrolyte and active substances during thermal runaway causes the pressure inside the battery to rise sharply, causing the lithium-ion battery to explode. Therefore, the design of the explosion-proof valve 101 is to achieve directional discharge of thermal runaway, so that protection design can be added in a specific direction to reduce safety risks.

[0035] In some embodiments of the present application, Figure 5 and Figure 6 As shown, the battery cell single body bracket may further include a clamping plate 17, a protrusion 18 and a clamping member 19. One end of the clamping plate 17 is connected to a second enclosure 13; the protrusion 18 is connected to one side of the clamping plate 17; the clamping member 19 is provided with a connecting groove 191, and a clamping groove 1911 is provided in the connecting groove 191, and the clamping member 19 is arranged outside the other second enclosure 13; the clamping plate 17 on one bracket frame 1 extends into the connecting groove 191 of another bracket frame 1, and a protrusion 18 is clamped in a clamping groove 1911, and there is a gap between the protrusion 18 and the inner wall of the clamping groove 1911.

[0036] In this way, when the clamping plate 17 is inserted into the connecting groove 191 in the clamping member 19, the protrusion 18 can be just clamped in the clamping groove 1911, so that the clamping plate 17 and the clamping member 19 are connected, and then the bracket frame 1 is further connected. In order to ensure that there is a certain fault tolerance space between the bracket frames 1, there is a gap between the protrusion 18 and the inner wall of the clamping groove 1911.

[0037] Furthermore, if Figure 6As shown, the protrusion 18 has a first end a and a second end b, wherein the first end a is connected to the clamping plate 17, and the second end b has an inclined surface. Specifically, the lower end of the inclined surface of the second end b faces the connecting groove 191, so that the second end b can more easily enter the connecting groove 191 for locking. Figure 6 As shown, the height h2 can be slightly smaller than the height h1, so that due to the effect of the inclined surface, the end of the clamping plate 17 can be slightly tilted when it touches the end of the connecting groove 191, and because the top has a height space h1, it has a certain elastic space. When the protrusion 18 slides into the clamping groove 1911 in the connecting groove 191, the clamping plate 17 is deformed to a certain extent, so the protrusion 18 will fall into the clamping groove 1911 to restore the deformation, thereby achieving fixation.

[0038] On the other hand, an embodiment of the present invention further provides a vehicle battery pack, comprising the above-mentioned battery cell holder and a battery cell 100 located in the battery cell holder.

[0039] On the other hand, an embodiment of the present invention further provides an electric vehicle, comprising the above-mentioned vehicle battery pack.

[0040] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present utility model, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0043] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0044] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A battery cell single body bracket, characterized in that: It comprises two bracket frames arranged opposite to each other and an elastic connector connecting the two bracket frames together; the bracket frames have cell slots, a part of a cell single body is located in the cell slot of one bracket frame, and the other part is located in the cell slot of the other bracket frame.

2. The battery cell support according to claim 1, characterized in that: The battery cell slot comprises a first battery cell single cell slot and a second battery cell single cell slot; The support frame comprises: Two first enclosures are arranged opposite to each other; Two second enclosures are arranged opposite to each other and are connected end to end with the two first enclosures arranged at intervals; the two first enclosures and the two second enclosures enclose a receiving cavity; A plurality of partitions are arranged in the accommodating cavity at intervals, and one end of the partition is connected to a first enclosure, and the other end of the partition is connected to another first enclosure; A plurality of connecting plates are arranged between the second enclosure and the adjacent partition, or between two adjacent partitions; the connecting plates and two parts of the first enclosure relative to each other and two adjacent partitions form a first battery cell single groove; the connecting plates and two parts of the first enclosure relative to each other, a part of a second enclosure and a partition form a second battery cell single groove.

3. The battery cell support as claimed in claim 2, characterized in that: The battery cell support also includes: The limiting plate is arranged around the bottom of the first battery cell single cell slot and the bottom of the second battery cell single cell slot.

4. The battery cell single body bracket according to claim 2, characterized in that: The battery cell is provided with an explosion-proof valve, and the connecting plate is provided with a through hole, one through hole corresponds to one explosion-proof valve, and is used for allowing hot air discharged from the explosion-proof valve to flow through after the battery cell is heated.

5. The battery cell support according to any one of claims 2 to 4, characterized in that: The elastic connecting piece is a binding belt, which is wound around the two support frames for at least one circle.

6. The battery cell support as claimed in claim 5, characterized in that: The battery cell support also includes: A clamping plate, one end of which is connected to one of the second enclosure panels; A protrusion connected to one side of the clamping plate; A clamping member is provided with a connecting groove, a clamping groove is provided in the connecting groove, and the clamping member is arranged on the outer side of another second enclosure plate; The clamping plate on one of the bracket frames extends into the connecting groove of the other bracket frame, and one of the protrusions is clamped in one of the clamping grooves, and a gap exists between the protrusion and the inner wall of the clamping groove.

7. The battery cell support as claimed in claim 6, characterized in that: The protrusion has a first end and a second end, wherein the first end is connected to the clamping plate, and the second end has a slope.

8. An automotive battery pack, characterized in that: The invention comprises the battery cell monomer support as claimed in any one of claims 1 to 7 and the battery cell monomer located in the battery cell monomer support.

9. An electric vehicle, characterized in that: Including the automotive battery pack as described in claim 8.

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