Battery cell support and battery

Abstract

The utility model relates to the technical field of batteries, and provides a battery cell bracket and a battery, a battery cell comprises two stage groups, and the battery cell bracket comprises a frame and a supporting piece. Wherein the frame comprises two parallel cross beams and two parallel longitudinal beams, the cross beams and the longitudinal beams are connected end to end to form a square containing space, and the two stage groups are placed in the containing space in the first direction; the supporting piece is installed in the containing space and located between the two stage groups, the supporting piece comprises an installation part and a turnover part, the installation part is fixedly connected with the frame, the turnover part can turn over relative to the installation part, and the tabs of the two stage groups can be placed on the installation part and can be clamped between the turnover part and the installation part. The frame can hoop the two stage groups and maintain relative fixation of the two stage groups; the supporting piece can keep relative fixation of the pole pieces and the pole lugs of the pole group, can prevent damage between the two pole lugs and / or damage between the pole lugs and the pole pieces, and avoids the problem of poor connection of the battery caused by the above reasons.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery cell bracket and a battery. Background Art

[0002] With the increasing maturity of technologies of power batteries such as lithium-ion batteries, power batteries have gradually become the main energy source of new energy vehicles.

[0003] In order to meet the usage requirements of new energy vehicles for long-distance driving, some manufacturers focus on researching large-size battery cells to improve the energy storage capacity of the battery. However, as the size of the battery cells increases, the installation problems during their use become more and more obvious. For example, due to their own strength problems, the battery cells often bend and deform, resulting in a reduction in the yield rate of battery cell production.

[0004] There are also some manufacturers who increase the number of battery cells installed in new energy vehicles and connect the battery cells in series to improve the endurance. Generally, the battery cells are welded through tabs. When the vehicle is running, the shaking is likely to cause the connection between the tabs to break or the connection between the tab and the electrode plate to break. As a result, the battery has a problem of poor contact and needs to be frequently repaired.

[0005] Therefore, there is an urgent need for a battery cell bracket and a battery to solve the above technical problems. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a battery cell bracket and a battery, which can maintain the relative fixation of several cell groups and can protect the tabs.

[0007] To achieve the above object, the utility model adopts the following technical solutions:

[0008] A battery cell bracket, the battery cell includes two cell groups, and the battery cell bracket includes:

[0009] A frame, the frame includes two parallel cross beams and two parallel longitudinal beams. The cross beams and the longitudinal beams are connected end to end to form a rectangular accommodation space with an opening. The two cell groups are placed in the accommodation space along a first direction;

[0010] A support member, the support member is installed in the accommodation space and is located between the two cell groups. The support member includes a mounting portion and a folding portion. The mounting portion is fixedly connected to the frame, and the folding portion can be flipped relative to the mounting portion. The tabs of the two cell groups can be clamped between the folding portion and the mounting portion.

[0011] As a preferred technical solution of the above battery cell bracket, the frame is provided with insertion holes in a second direction, and the end of the mounting portion in the second direction can be inserted into the insertion holes;

[0012] The first direction is perpendicular to the second direction.

[0013] As a preferred technical solution of the battery cell support, the radial cross-section of the insertion hole is polygonal, and the radial cross-sectional shapes at both ends of the installation part in the second direction are corresponding polygons to limit the rotation of the installation part relative to the frame.

[0014] As a preferred technical solution of the battery cell support, the frame is provided with a groove, the opening in the depth direction of the groove is formed on the end face of the frame in the third direction, and the groove penetrates through the frame and communicates with the inner and outer sides of the accommodation space;

[0015] The first direction, the second direction, and the third direction are perpendicular to each other pairwise.

[0016] As a preferred technical solution of the battery cell support, a limiting member is provided on one side of the frame in the third direction, and the limiting member can abut against the battery cell group in the third direction;

[0017] The third direction is perpendicular to the first direction.

[0018] As a preferred technical solution of the battery cell support, it further includes an insulating film, the insulating film is wrapped outside the battery cell group, the frame is sleeved outside the insulating film, and the insulating film is provided with a first air vent.

[0019] As a preferred technical solution of the battery cell support, the installation part and the folding part are integrally injection molded.

[0020] As a preferred technical solution of the battery cell support, the pole ears of the two battery cell groups are welded and fixed.

[0021] A battery is further provided, which includes a housing, the battery cell group, and the battery cell support described above. The battery cell group and the battery cell support are inserted into the housing. A second air vent is provided on the side wall of the housing, and a first explosion-proof valve is installed at the second air vent. A protective sticker is provided at the second air vent, the protective sticker is located between the first explosion-proof valve and the frame, and the protective sticker is provided with a slit, and the air flow in the housing can contact the first explosion-proof valve through the slit.

[0022] As a preferred technical solution of the battery, it further includes a positive electrode cover plate and a negative electrode cover plate. The positive electrode cover plate and the negative electrode cover plate are respectively fixed at both ends of the housing in the first direction, and the second explosion-proof valve is installed on the positive electrode cover plate and / or the negative electrode cover plate.

[0023] Advantages of the present utility model:

[0024] The present utility model provides a battery cell support and a battery. The battery cell includes two cell groups, and the battery cell support includes a frame and a support member. Among them, the frame includes two parallel cross beams and two parallel longitudinal beams, and the cross beams and the longitudinal beams are connected end to end to form a rectangular accommodation space. The two cell groups are placed in the accommodation space along the first direction; the support member is installed in the accommodation space and located between the two cell groups. The support member includes a mounting portion and a folding portion. The mounting portion is fixedly connected to the frame, and the folding portion can be flipped relative to the mounting portion. The tabs of the two cell groups can be placed on the mounting portion and clamped between the folding portion and the mounting portion.

[0025] The support member is connected to the two longitudinal beams, and the rectangular accommodation space is divided into two accommodation sub-spaces arranged in the first direction. The support member includes a mounting portion and a folding portion. The mounting portion is connected to the frame and is used to support the electrode plates. The folding portion can rotate relative to the mounting portion. The support member includes two states: open and closed. When in the open state, the folding portion is away from the mounting portion; when in the closed state, the folding portion is buckled with the mounting portion. The two cell groups are respectively placed in the accommodation sub-spaces, and the frame can hoop the two cell groups to maintain the relative fixation of the two cell groups; the electrode plates of the two cell groups are overlapped on the mounting portion of the support member. When the support member is switched from the open state to the closed state, the folding portion is buckled with the mounting portion, and the electrode plates are clamped between the folding portion and the mounting portion, so as to realize the protection of the support member for the electrode plates. And because the cell group and the frame can be kept relatively fixed, and the support member and the frame are kept relatively fixed, thus, the relative fixation of the electrode plates and the tabs of the cell group can be maintained, and damage between the two tabs and / or damage between the tab and the electrode plate can be prevented, avoiding the problem of poor connection of the battery due to the above reasons. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present utility model and these drawings.

[0027] Figure 1 is a schematic structural diagram of the battery cell support (excluding the housing) provided by the embodiment of the present utility model;

[0028] Figure 2 is an assembly schematic diagram of the battery cell support (excluding the housing) and the cell group provided by the embodiment of the present utility model;

[0029] Figure 3 is a schematic structural diagram of the frame provided by the embodiment of the present utility model;

[0030] Figure 4It is a schematic structural diagram of the support member (in the open state) provided by an embodiment of the present utility model;

[0031] Figure 5 It is a schematic structural diagram of the support member (in the closed state) provided by an embodiment of the present utility model;

[0032] Figure 6 It is a schematic structural diagram of the negative electrode cover plate provided by an embodiment of the present utility model;

[0033] Figure 7 It is a schematic structural diagram of the housing provided by an embodiment of the present utility model;

[0034] Figure 8 is Figure 7 a partial enlarged view of the cross-section at A-A in

[0035] Figure 9 It is a schematic structural diagram of the protective sticker provided by an embodiment of the present utility model.

[0036] In the figure:

[0037] X, the first direction; Y, the second direction; Z, the third direction;

[0038] 100, stage group;

[0039] 210, frame; 211, cross beam; 212, longitudinal beam; 2121, insertion hole; 2122, groove; 2123, limiting portion; 2124, connecting portion; 213, accommodating space; 214, accommodating sub-space;

[0040] 220, support member; 221, installation portion; 222, folding portion;

[0041] 230, housing; 231, first explosion-proof valve; 232, protective sticker; 2321, slit;

[0042] 240, positive electrode cover plate; 250, negative electrode cover plate; 251, second explosion-proof valve. Detailed implementation manners

[0043] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only parts related to the present utility model are shown in the drawings rather than all the structures.

[0044] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0045] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0046] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0047] As Figures 1 to 5 shown, the present utility model provides a battery cell bracket. The battery cell includes two cell groups 100, and the battery cell bracket includes a frame 210 and a support member 220. Among them, the frame 210 includes two parallel cross beams 211 and two parallel longitudinal beams 212. The cross beams 211 and the longitudinal beams 212 are connected end to end to form a rectangular accommodating space 213. The two cell groups 100 are placed in the accommodating space 213 along the first direction X; the support member 220 is installed in the accommodating space 213 and is located between the two cell groups 100. The support member 220 includes a mounting portion 221 and a folding portion 222. The mounting portion 221 is fixedly connected to the frame 210, and the folding portion 222 can be flipped relative to the mounting portion 221. The tabs of the two cell groups 100 can be clamped between the folding portion 222 and the mounting portion 221.

[0048] Exemplarily, in this embodiment, two cross beams 211 are arranged in parallel in the first direction X, two longitudinal beams 212 are arranged in parallel in the second direction Y, and the support member 220 is connected to the two longitudinal beams 212, dividing the rectangular accommodating space 213 into two accommodating sub-spaces 214 arranged in the first direction X. The support member 220 includes a mounting portion 221 and a folding portion 222. The mounting portion 221 is connected to the frame 210 and is used to support the electrode plates. The folding portion 222 can rotate relative to the mounting portion 221. The support member 220 includes two states: open and closed. When in the open state, the folding portion 222 is away from the mounting portion 221. When in the closed state, the folding portion 222 is buckled with the mounting portion 221.

[0049] Two stage groups 100 are respectively placed in the accommodating sub-spaces 214. The frame 210 can hoop the two stage groups 100 to maintain the relative fixation of the two stage groups 100. The electrode plates of the two stage groups 100 are lapped on the mounting portion 221 of the support member 220. When the support member 220 is switched from the open state to the closed state, the folding portion 222 is buckled with the mounting portion 221, and the electrode plates are clamped between the folding portion 222 and the mounting portion 221, thus realizing the protection of the support member 220 for the electrode plates. And since the stage group 100 and the frame 210 can remain relatively fixed, and the support member 220 and the frame 210 remain relatively fixed, in this way, the relative fixation of the electrode plates and the electrode tabs of the stage group 100 can be maintained, and the problem of poor connection caused by damage between the two electrode tabs and / or damage between the electrode tab and the electrode plate can be prevented.

[0050] As Figure 3 shown, optionally, the frame 210 is provided with insertion holes 2121 in the second direction Y, and the ends of the mounting portion 221 in the second direction Y can be inserted into the insertion holes 2121. The first direction X is perpendicular to the second direction Y.

[0051] Preferably, at least one insertion hole 2121 is provided on both sides of the frame 210 in the second direction Y.

[0052] Exemplarily, in this embodiment, the radial cross-section of the insertion hole 2121 is polygonal, and the radial cross-section shapes of the two ends of the mounting portion 221 in the second direction Y are corresponding polygons to limit the rotation of the mounting portion 221 relative to the frame 210. With such a setting, the end of the mounting portion 221 is inserted into the insertion hole 2121 along the second direction Y, and the polygonal outer contour of the end of the mounting portion 221 interferes with the polygonal inner contour of the insertion hole 2121, thereby restricting the relative rotation between the mounting portion 221 and the frame 210 and avoiding damage to the electrode plates due to the bending force caused by the rotation between the two. And by limiting the cross-section shape, only one insertion hole 2121 needs to be opened on each side of the frame 210 in the second direction Y.

[0053] In other embodiments, at least two or more insertion holes 2121 are provided on at least one side of the frame 210 in the second direction Y, and at least one side of the mounting portion 221 is inserted into at least two or more insertion holes 2121. In this way, the rotation between the mounting portion 221 and the frame 210 is restricted by the distribution of the insertion holes 2121.

[0054] Optionally, the frame 210 is provided with a groove 2122. The opening in the depth direction of the groove 2122 is formed on the end face of the frame 210 in the third direction Z, and the groove 2122 penetrates the frame 210 and communicates with the inside and outside of the accommodation space 213; the first direction X, the second direction Y, and the third direction Z are perpendicular to each other. In this way, by providing the groove 2122, a flow channel is formed on the peripheral side of the stage group 100, facilitating the flow of fluid.

[0055] Exemplarily, in this embodiment, the longitudinal beam 212 includes a limiting portion 2123 and a connecting portion 2124. In the third direction Z, the size of the limiting portion 2123 is larger than that of the connecting portion 2124. A plurality of limiting portions 2123 are arranged in sequence along the first direction X, and adjacent two limiting portions 2123 are connected by the connecting portion 2124. The side walls of adjacent two limiting portions 2123 and the connecting portion 2124 form the groove 2122. In this way, the quality of the frame 210 can also be reduced.

[0056] Optionally, a limiting member is provided on one side of the frame 210 in the third direction Z, and the limiting member can abut against the stage group 100 in the third direction Z; the third direction Z is perpendicular to the first direction X. With such a setting, the stage group 100 is placed in the accommodation space 213 along the third direction Z. When the stage group 100 abuts against the limiting member in the third direction Z, it can be regarded that the stage group 100 is installed in place with the frame 210.

[0057] Specifically, the limiting member can be formed on the cross beam 211 and / or the longitudinal beam 212, and is away from the support member 220 in the first direction X.

[0058] Optionally, the battery cell support further includes an insulating film. The insulating film is wrapped outside the stage group 100, and the frame 210 is sleeved outside the insulating film. The insulating film is provided with a first air vent.

[0059] Schematically, when the insulating film is wound around the stage group 100, gaps are left between the insulating films to form the first air vent, so that fluid can enter and exit the insulating film through the first air vent, thereby adjusting the pressure inside the insulating film.

[0060] It should be noted that the mutually connected tab ears are also wrapped by the insulating film.

[0061] It should be noted that the insulating film is a prior art, and its specific structure will not be elaborated here.

[0062] Optionally, the mounting portion 221 and the folding portion 222 are integrally injection molded.

[0063] Optionally, the tabs of the two cell groups 100 are welded and fixed. Specifically, the tabs adopt a horizontal welding method, which has a simple processing technology, can further reduce the internal resistance, and can save the length of the tabs and reduce the space inside the battery cell.

[0064] A battery is also provided, as Figures 6 to 9 shown. The battery includes a housing 230, a cell group 100, and a battery cell bracket. The cell group 100 and the battery cell bracket are inserted into the housing 230. A second vent hole is provided on the side wall of the housing 230. A first explosion-proof valve 231 is installed at the second vent hole. A protective sticker 232 is provided at the second vent hole. The protective sticker 232 is located between the first explosion-proof valve 231 and the frame 210. The protective sticker 232 is provided with a slit 2321. The air flow inside the housing 230 can contact the first explosion-proof valve 231 through the slit 2321.

[0065] In this way, when the cell group 100 has an abnormal condition and generates a large amount of gas, the pressure inside the housing 230 increases. When the pressure value is greater than the pressure threshold of the first explosion-proof valve 231, the first explosion-proof valve 231 opens, so that the second vent hole communicates the interior of the housing 230 with the outdoor environment, thereby achieving the purpose of rapid pressure relief.

[0066] Since the frame 210 is very likely to scrape or collide with the first explosion-proof valve 231 when the cell group 100 and the battery cell bracket are inserted into the housing 230, resulting in damage to the first explosion-proof valve 231. For this reason, in this embodiment, the first explosion-proof valve 231 is protected by providing the protective sticker 232 to prevent the first explosion-proof valve 231 from directly contacting the frame 210. The air flow can pass through the slit 2321 of the protective sticker 232.

[0067] Exemplarily, the second vent hole is opened on a side wall of the housing 230 in the second direction Y, so that the fluid can flow along the groove 2122 opened on the frame 210 to the second vent hole.

[0068] Optionally, the battery further includes a positive electrode cover plate 240 and a negative electrode cover plate 250. The positive electrode cover plate 240 and the negative electrode cover plate 250 are respectively fixed at both ends of the housing 230 in the first direction X, and a second explosion-proof valve 251 is installed on the positive electrode cover plate 240 and / or the negative electrode cover plate 250. In this way, when the cell group 100 has an abnormal condition and generates a large amount of gas, the pressure inside the housing 230 increases. When the pressure value is greater than the pressure threshold of the second explosion-proof valve 251, the second explosion-proof valve 251 opens, thereby achieving the purpose of rapid pressure relief. When the pressure value inside the housing 230 returns to be less than the pressure threshold of the second explosion-proof valve 251, the second explosion-proof valve 251 closes again. In this way, through the coordinated action of the first explosion-proof valve 231 and the second explosion-proof valve 251, rapid pressure relief can be completed.

[0069] In addition, the above are only the preferred embodiments of the present utility model and the applied technical principles. Those skilled in the art will understand that the present utility model is not limited to the specific embodiments described herein. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present utility model. Therefore, although the present utility model has been described in detail through the above embodiments, the present utility model is not limited to the above embodiments only. Without departing from the concept of the present utility model, it may also include more other equivalent embodiments, and the scope of the present utility model is determined by the scope of the appended claims.

Claims

1. Battery cell holder, the battery cell includes two cell groups (100), characterized in that, The battery cell bracket includes: A frame (210), the frame (210) includes two parallel cross beams (211) and two parallel longitudinal beams (212), the cross beams (211) and the longitudinal beams (212) are connected end to end to form a rectangular accommodation space (213), and the two battery cell groups (100) are placed in the accommodation space (213) along the first direction (X); A support member (220), the support member (220) is installed in the accommodation space (213) and located between the two battery cell groups (100), the support member (220) includes a mounting portion (221) and a folding portion (222), the mounting portion (221) is fixedly connected to the frame (210), and the folding portion (222) can be flipped relative to the mounting portion (221), and the tabs of the two battery cell groups (100) can be clamped between the folding portion (222) and the mounting portion (221).

2. The cell holder according to claim 1, wherein, The frame (210) is provided with a plug hole (2121) in the second direction (Y), and the end of the mounting portion (221) in the second direction (Y) can be inserted into the plug hole (2121). The first direction (X) is perpendicular to the second direction (Y).

3. The cell holder according to claim 2, characterized in that, The radial cross section of the plug hole (2121) is polygonal, and the radial cross section shapes of the two ends of the mounting portion (221) in the second direction (Y) are corresponding polygons to limit the rotation of the mounting portion (221) relative to the frame (210).

4. The cell holder according to claim 2, wherein The frame (210) is provided with a groove (2122), the opening in the depth direction of the groove (2122) is formed on the end face of the frame (210) in the third direction (Z), and the groove (2122) penetrates through the frame (210) and communicates with the inside and outside of the accommodation space (213). The first direction (X), the second direction (Y) and the third direction (Z) are perpendicular to each other in pairs.

5. The cell holder according to claim 1, wherein A limiting member is provided on one side of the frame (210) in the third direction (Z), and the limiting member can abut against the battery cell group (100) in the third direction (Z). The third direction (Z) is perpendicular to the first direction (X).

6. The cell holder according to claim 1, characterized in that, It further includes an insulating film, the insulating film wraps around the battery cell group (100), the frame (210) is sleeved outside the insulating film, and the insulating film is provided with a first air vent.

7. The cell support according to any one of claims 1-6, characterized in that, The mounting portion (221) and the folding portion (222) are integrally injection molded.

8. The cell support according to any one of claims 1-6, characterized in that, The tabs of the two battery cell groups (100) are welded and fixed.

9. A battery, characterized in that, It includes a housing (230), the stage group (100), and the battery cell support bracket according to any one of claims 1-8. The stage group (100) and the battery cell support bracket are inserted into the housing (230). A second air vent is provided on the side wall of the housing (230), and a first explosion-proof valve (231) is installed at the second air vent. A protective sticker (232) is provided at the second air vent, and the protective sticker (232) is located between the first explosion-proof valve (231) and the frame (210). The protective sticker (232) is provided with a slit (2321), and the air flow in the housing (230) can contact the first explosion-proof valve (231) through the slit (2321).

10. The battery according to claim 9, characterized in that, It further includes a positive electrode cover plate (240) and a negative electrode cover plate (250). The positive electrode cover plate (240) and the negative electrode cover plate (250) are respectively fixed to both ends of the housing (230) in the first direction (X), and a second explosion-proof valve (251) is installed on the positive electrode cover plate (240) and / or the negative electrode cover plate (250).

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