End plate for battery cell, battery module, battery pack and vehicle

Abstract

The invention relates to an end plate for a battery cell, a battery module, a battery pack and a vehicle. The end plate for the battery cell comprises an end plate body, an insulating protection seat and a sliding structure, the end plate body is used for being arranged on one side in the expansion direction of a battery cell, and the insulating protection seat is used for being connected with an output electrode of the battery cell; the insulation protection seat is in sliding connection with the end plate body through the sliding structure along the expansion direction of the battery cell, so that the end plate body can slide relative to the insulation protection seat along the expansion direction when the battery cell expands; therefore, the condition that the output electrode is broken or the welding seam between the output electrode and the battery cell is invalid is avoided to a certain extent, the service life of the battery module is prolonged, and the safety performance of the battery module is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and in particular to an end plate for a battery cell, a battery module, a battery pack, and a vehicle. Background Art

[0002] At present, new energy electric vehicles are receiving more and more attention from the society and have become the development direction of future vehicles. The battery pack is an important component of electric vehicles, which includes a battery module. The battery module usually includes a battery cell and an end plate connected to both ends of the battery cell.

[0003] In the related art, in order to avoid electric shock accidents caused by contact between the battery cell and the end plate, an output insulating seat is usually fixed on the upper end surface of the end plate, and the output pole of the battery cell is led out from the top of the end plate and electrically connected to the output insulating seat to fix the output pole to prevent it from contacting the end plate.

[0004] However, when the battery cell is charged, the battery cell expands to a certain extent, causing the end plate to slide along the expansion direction of the battery cell. Since the output insulating seat is fixedly connected to the output pole and the end plate of the battery cell respectively, the end plate drives the output insulating seat to slide together, causing the output pole to be pulled between the battery cell and the output insulating seat, resulting in the output pole breaking or the weld between the output pole and the battery cell failing, thereby reducing the service life and safety performance of the battery module. Summary of the invention

[0005] In order to solve the above technical problems, the present disclosure provides an end plate for a battery cell, a battery module, a battery pack and a vehicle.

[0006] In a first aspect, the present disclosure provides an end plate for a battery cell, comprising an end plate body, an insulating protective seat and a sliding structure;

[0007] The end plate body is used to be arranged on one side of the expansion direction of the battery core, and the insulating protective seat is used to be connected to the output pole of the battery core;

[0008] The insulating protection seat is slidably connected to the end plate body along the expansion direction of the battery cell through the sliding structure, so that the end plate body can slide relative to the insulating protection seat along the expansion direction when the battery cell expands.

[0009] Optionally, the sliding structure includes a slider and a slide groove, one of the slider and the slide groove is arranged on the end plate body, and the other of the slider and the slide groove is arranged on the insulating protection seat;

[0010] The slide groove is extended along the expansion direction, and the sliding block extends into the slide groove and can slide back and forth along the extension direction of the slide groove.

[0011] Optionally, a side of the slide groove facing away from the insulating protection seat has a limiting surface, and the sliding block can abut against the limiting surface to prevent the sliding block from escaping from the slide groove.

[0012] Optionally, a guide portion extending in a direction away from the slider is provided at the end of the slider.

[0013] Optionally, the end plate body has two spaced-apart side walls, one of which is located between the battery core and the other side wall;

[0014] The slide groove is arranged on the other side wall, and a positioning hole is opened at a position of the side wall corresponding to the slide groove;

[0015] At least a portion of the guide portion passes through the positioning hole, and a length of at least a portion of the guide portion is not less than a maximum expansion distance of the battery core.

[0016] Optionally, the end plate body has two spaced-apart side walls, one of which is located between the battery core and the other side wall;

[0017] The insulating protection seat is provided with a blocking member, and at least a portion of the blocking member can protrude in a direction away from the insulating protection seat and can block a side of the other side wall facing the one side wall.

[0018] Optionally, the resisting member includes an elastic arm and a resisting protrusion;

[0019] One side of the elastic arm is connected to the insulating protection seat, and the other side of the elastic arm is formed as a free end with a deformation gap between the elastic arm and the insulating protection seat;

[0020] The blocking protrusion is arranged at the free end and protrudes toward the other side wall.

[0021] Optionally, one of the end plate body and the insulating protective seat is further provided with a guide groove extending along the expansion direction of the battery core; the other of the end plate body and the insulating protective seat is further provided with a guide protrusion;

[0022] The guide protrusion extends into the guide groove and can slide along the extending direction of the guide groove.

[0023] In a second aspect, the present disclosure provides a battery module, comprising the end plate for a battery cell as described above.

[0024] In a third aspect, the present disclosure provides a battery pack comprising the battery module as described above.

[0025] In a fourth aspect, the present disclosure provides a vehicle, comprising the battery module as described above; or the vehicle comprises the battery pack as described above.

[0026] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0027] The end plate for the battery cell, the battery module, the battery pack and the vehicle provided by the present disclosure are provided with a sliding structure, and the insulating protection seat is slidably connected with the end plate body along the expansion direction of the battery cell through the sliding structure, so that the end plate body can slide relative to the insulating protection seat along the expansion direction of the battery cell when the battery cell expands. With such a configuration, when the battery cell expands, the end plate body can slide relative to the insulating protection seat under the push of the expansion of the battery cell, that is, when the battery cell expands, the end plate body will not drive the insulating protection seat to move, that is, the insulating protection seat will not move, so that the output pole and the insulating protection seat can maintain a good connection state, thereby avoiding the situation that the output pole is pulled between the battery cell and the insulating protection structure to a certain extent, and then avoiding the situation that the output pole is broken or the weld between the battery cell and the output pole fails to a certain extent, ensuring the stability of the electrical connection between the battery cell and the output pole, and improving the service life and safety performance of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0030] Figure 1 It is a structural schematic diagram of the end plate body according to an embodiment of the present disclosure;

[0031] Figure 2 The structure of the insulating protection seat according to the embodiment of the present disclosure is shown in FIG. Figure 1 ;

[0032] Figure 3 The structure of the insulating protection seat according to the embodiment of the present disclosure is shown in FIG. Figure 2 ;

[0033] Figure 4 The structure of the insulating protection seat according to the embodiment of the present disclosure is shown in FIG. Figure 3 ;

[0034] Figure 5Schematic diagram of the installation of the insulating protection seat on the end plate body according to the embodiment of the present disclosure Figure 1 ;

[0035] Figure 6 Schematic diagram of the installation of the insulating protection seat on the end plate body according to the embodiment of the present disclosure Figure 2 ;

[0036] Figure 7 It is a schematic cross-sectional view of the end plate for the battery cell according to the embodiment of the present disclosure along the extension direction of the slider.

[0037] Among them, 100, end plate for battery cell; 1, end plate body; 11, side wall; 111, slide groove; 112, limit surface; 113, positioning hole; 114, first rectangular groove section; 115, second circular groove section; 12, guide protrusion; 2, insulating protection seat; 21, slider; 211, matching surface; 212, guide part; 213, first rectangular block; 214, second circular block; 22, guide groove; 221, guide slope; 23, positioning installation groove; 24, embedded nut; 3, sliding structure; 4, stopper; 41, elastic arm; 42, stopper protrusion; 43, deformation gap. DETAILED DESCRIPTION

[0038] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0040] Reference Figures 1 to 7 As shown, this embodiment provides an end plate for a battery cell. The end plate 100 for a battery cell specifically includes an end plate body 1 , an insulating protection seat 2 and a sliding structure 3 .

[0041] The end plate body 1 is used to be arranged on one side of the expansion direction of the battery cell, the insulating protection seat 2 is used to be connected to the output pole of the battery cell, and the insulating protection seat 2 is slidably connected with the end plate body 1 along the expansion direction of the battery cell through the sliding structure 3, so that the end plate body 1 can slide relative to the insulating protection seat 2 along the expansion direction when the battery cell expands. Figure 2 , Figure 5 and Figure 7 XX direction shown.

[0042] That is to say, when the battery cell expands, the setting of the sliding structure 3 can enable the end plate body 1 to slide relative to the insulating protection seat 2 along the expansion direction of the battery cell under the drive of the battery cell.

[0043] Exemplarily, the battery cell includes at least two battery cell units stacked in sequence, and the expansion direction of the battery cell is consistent with the stacking direction of the battery cell units. Each battery cell has an output pole, and when the battery module of the vehicle includes multiple battery cells, at least two adjacent battery cells are electrically connected through the corresponding output poles.

[0044] For example, when the battery cell expands during charging or the like, the above-mentioned arrangement enables the end plate body 1 to slide relative to the insulating protection seat 2 under the influence of the expansion of the battery cell. That is to say, the end plate body 1 will not drive the insulating protection seat 2 to move, that is, the position of the insulating protection seat 2 relative to the end plate body 1 is fixed. Therefore, a good connection state can be maintained between the output pole and the insulating protection seat 2, thereby avoiding to a certain extent the situation where the output pole is pulled between the battery cell and the insulating protection seat 2, and further avoiding to a certain extent the situation where the output pole breaks or the weld between the battery cell and the output pole fails, thereby ensuring the stability of the electrical connection between the battery cell and the output pole and improving the service life and safety performance of the battery module.

[0045] Among them, this embodiment mainly considers the problem of output pole breakage caused by sliding between the insulating protection seat 2 and the output pole or failure of the weld between the battery cell and the output pole.

[0046] The end plate for the battery cell provided in this embodiment is provided with a sliding structure 3, and the insulating protection seat 2 is slidably connected with the end plate body 1 along the expansion direction of the battery cell through the sliding structure 3, so that the end plate body 1 can slide relative to the insulating protection seat 2 along the expansion direction of the battery cell when the battery cell expands. In this way, when the battery cell expands, the end plate body 1 can slide relative to the insulating protection seat 2 under the push of the expansion of the battery cell, that is, when the battery cell expands, the end plate body 1 will not drive the insulating protection seat 2 to move, that is, the insulating protection seat 2 will not move, so that the output pole and the insulating protection seat 2 can maintain a good connection state, thereby avoiding the situation that the output pole is pulled between the battery cell and the insulating protection seat 2 to a certain extent, and then avoiding the situation that the output pole is broken or the weld between the battery cell and the output pole fails to a certain extent, ensuring the stability of the electrical connection between the battery cell and the output pole, and improving the service life and safety performance of the battery module.

[0047] When implementing it, refer to Figures 3 to 7As shown, the insulating protection seat 2 has a positioning and mounting groove 23 for positioning at least the output pole of the battery cell (i.e., the output pole busbar of the battery cell), and the groove wall of the positioning and mounting groove 23 can provide certain shielding and isolation for the output pole, thereby ensuring the electrical safety between the output pole and other structures outside the battery cell.

[0048] The insulating protection seat 2 is made of plastic and is formed by injection molding. A metal inlay nut 24 is provided on the insulating protection seat 2, and the inlay nut 24 is integrally formed with the insulating protection seat 2 during injection molding of the insulating protection seat 2. The inlay nut 24 can be fixedly connected to the output pole by bolts, for example.

[0049] In some embodiments, reference Figures 1 to 7 As shown, the sliding structure 3 includes a slider 21 and a slide groove 111. The slider 21 is arranged on the insulating protection seat 2, and the slide groove 111 is arranged on the end plate body 1. The slide groove 111 is extended along the expansion direction of the battery cell, and the slider 21 can extend into the slide groove 111 and can slide back and forth along the extension direction of the slide groove 111. Together, they form a sliding structure 3. The extension direction of the slide groove 111 is consistent with the expansion direction of the battery cell, and the same Figure 2 , Figure 5 and Figure 7 XX direction shown.

[0050] In this way, the relative sliding between the end plate body 1 and the insulating protection seat 2 is achieved through the cooperation of the slider 21 and the slide groove 111. When the battery cell expands, the setting of the slider 21 and the slide groove 111 can improve the stability and reliability of the end plate body 1 when sliding relative to the insulating protection seat 2 to a certain extent, thereby avoiding the output pole being pulled between the battery cell and the insulating protection seat 2 to a certain extent, and reducing the probability of the output pole breaking or the weld failure between the battery cell and the output pole to a certain extent, thereby ensuring the stability of the electrical connection between the battery cell and the output pole, and improving the service life and safety performance of the battery module.

[0051] In a specific implementation, for example, there may be at least two sliders 21 , which are arranged at intervals on the insulating protection seat 2 , and at least two slide grooves 111 , which are arranged one-to-one corresponding to the sliders 21 .

[0052] Of course, in other embodiments, a slide groove 111 may be provided on the insulating protection seat 2 , and a slider 21 that can extend into the slide groove 111 may be provided on the end plate body 1 .

[0053] In some embodiments, reference Figures 1 to 6As shown, the side of the slide groove 111 away from the insulating protection seat 2 has a limiting surface 112, and the slider 21 can be pressed against the limiting surface 112 to prevent the slider 21 from escaping from the slide groove 111. Specifically, the slider 21 is prevented from escaping from the slide groove 111 in the sliding direction perpendicular to the end plate body 1. The sliding direction perpendicular to the end plate body 1 specifically refers to Figure 5 and Figure 7 In the vertical upward direction.

[0054] This arrangement can, to a certain extent, avoid the situation where the slider 21 is separated from the slide groove 111, and to a certain extent improve the stability of the sliding connection between the end plate body 1 and the insulating protection seat 2. The end plate body 1 has high stability and reliability when sliding relative to the insulating protection seat 2, and further avoids the output pole from breaking or the weld failure between the battery cell and the output pole, thereby protecting the output pole to a certain extent.

[0055] In a specific implementation, the slider 21 has a matching surface 211 , and specifically, the matching surface 211 abuts against a side of the limiting surface 112 that is away from the insulating protection seat 2 .

[0056] For example, refer to Figures 1 to 5 As shown, the slide groove 111 may include, for example, a first rectangular groove section 114 and a second circular groove section 115 that are connected to each other, the second circular groove section 115 may have a notch, the first rectangular groove section 114 may extend from the notch toward a direction away from the second circular groove section 115, and the groove width of the first rectangular groove section 114 is smaller than the maximum groove width of the second circular groove section 115. The first rectangular groove section 114 is located on a side of the second circular groove section 115 that faces the insulating protection seat 2.

[0057] The slider 21 may include, for example, a first rectangular block 213 matching the shape of the first rectangular slot segment 114, and a second circular block 214 matching the shape of the second circular slot segment 115, and the first rectangular block 213 is connected to the second circular block 214. Specifically, a side of the second circular block 214 facing the insulation protection seat 2 is formed as a mating surface 211, and a side of the second circular slot segment 115 facing away from the insulation protection seat 2 is formed as a limiting surface 112.

[0058] In some embodiments, reference Figures 3 to 6 As shown, a guide portion 212 extending along the expansion direction is provided at the end of the slider 21. The slider 21 can extend into the slide groove 111 under the guidance of the guide portion 212.

[0059] This arrangement makes it easy to guide the slider 21 quickly and stably through the guide portion 212 and extend it into the slide groove 111, which improves the efficiency of the slider 21 extending into the slide groove 111 to a certain extent, and the slide groove 111 and the slider 21 are convenient and efficient to match.

[0060] For example, refer to Figures 3 to 5 As shown, the guide portion 212 may be, for example, a circular guide column formed by extending the second circular block 214 along the sliding direction of the slider 21 .

[0061] In some embodiments, reference Figures 1 to 7 As shown, the end plate body 1 has two spaced-apart side walls 11, one of which is located between the battery cell and the other side wall 11. The other side wall 11 is provided with a slide groove 111, and a positioning hole 113 is provided at a position corresponding to the slide groove 111 of one side wall 11. At the same time, at least part of the guide portion 212 passes through the positioning hole 113, and the length of at least part of the guide portion 212 is not less than the maximum expansion distance of the battery cell. Specifically, the positioning hole 113 allows the guide portion 212 to extend into and slide.

[0062] Exemplarily, when the insulating protective seat 2 and the end plate body 1 are installed in place and the battery cell has not expanded, at least part of the guide portion 212 passes through the positioning hole 113, and at the same time, the length of the portion of the guide portion passing through the positioning hole 113 is not less than the maximum expansion distance of the battery cell. That is, when the battery cell expands to the maximum extent, the guide portion 212 is still located in the positioning hole 113 and will not move out of the positioning hole 113.

[0063] Through the above-mentioned arrangement, on the one hand, the cooperation of the positioning hole 113 and the slide groove 111 can, to a certain extent, prevent the slider 21 from shaking in its sliding direction when the end plate body 1 slides relative to the insulating protection seat 2, and to a certain extent improves the stability and reliability of the end plate body 1 when it slides relative to the insulating protection seat 2 driven by the expansion of the battery cell, thereby further avoiding the output pole from breaking or the weld failure between the battery cell and the output pole, and further protecting the output pole.

[0064] On the other hand, since a positioning hole 113 is provided on one of the side walls 11, in combination with the setting of the limiting surface 112, it is possible to further prevent the insulating protective seat 2 and the end plate body 1 from sliding in a direction perpendicular to the sliding direction of the end plate body 1 ( Figure 5 and Figure 7 The shaking occurs in the YY direction (as shown in the figure), which further improves the stability of the end plate body 1 when sliding relative to the insulating protective seat 2, improves the protection effect on the output pole, and thus improves the service life and safety performance of the battery module to a certain extent.

[0065] Of course, the above-mentioned slide grooves can also be opened on both side walls 11 of the end plate body 1. When the insulating protection seat 2 and the end plate body 1 are installed in place and the battery cell has not expanded, at least part of the guide portion 212 passes through the slide groove on one of the side walls 11, and at the same time, the length of the part of the guide portion passing through the slide groove on one of the side walls 11 is not less than the maximum expansion distance of the battery cell.

[0066] In some embodiments, reference Figure 4 , Figure 5 and Figure 7 As shown, a stopper 4 is provided on the insulating protection seat 2, and at least a portion of the stopper 4 can protrude in a direction away from the insulating protection seat 2, and can stop the side of the other side wall 11 facing one of the side walls 11. The side of the other side wall 11 facing one of the side walls 11 specifically refers to Figure 7 On the left side of the XX direction.

[0067] In this way, when the insulating protection seat 2 and the end plate body 1 are installed in place, it can prevent the insulating protection seat 2 from being moved toward the end plate body 1 through the other side wall 11 to a certain extent. Figure 7 The right side of the insulating plate 2 moves and slides off the end plate body 1, that is, the separation of the end plate body 1 and the insulating protection seat 2 is avoided to a certain extent, thereby ensuring the stability of the sliding fit between the insulating protection seat 2 and the end plate body 1 to a certain extent, improving the protection effect on the output pole, and the stability of the entire end plate is good.

[0068] At the same time, refer to Figure 7 As shown, the stopper 4 cooperates with the positioning hole 113 , the slider 21 and the guide portion 212 to ensure that the insulating protection seat 2 is always located between the two side walls 11 to a certain extent, so as to limit the sliding distance of the end plate body 1 .

[0069] In some embodiments, reference Figure 4 , Figure 5 and Figure 7 As shown, the stopper 4 includes an elastic arm 41 and a stopper protrusion 42. One side of the elastic arm 41 is connected to the insulating protection seat 2, and the other side of the elastic arm 41 is formed as a free end, and a deformation gap 43 is formed between the elastic arm 41 and the insulating protection seat 2. The stopper protrusion 42 is arranged at the free end and protrudes toward the direction of the other side wall 11, so that the stopper protrusion 42 can stop the side of the other side wall 11 facing one of the side walls 11.

[0070] That is to say, the stopper 4 is an elastic stopper. Figure 5 and Figure 6As shown, when installing the insulating protection seat 2 and the end plate body 1, first, the guide portion 212 of the insulating protection seat 2 is extended into the slide groove 111 of the end plate body 1, and when the stopper 4 slides to abut against the other side wall 11, the other side wall 11 will apply pressure to the elastic arm 41, and the elastic arm 41 will drive the stopper protrusion 42 to deform toward the side close to the insulating protection seat 2, and continue to slide to the side of the other side wall 11 facing one of the side walls 11. At this time, the elastic arm 41 loses the abutment with the other side wall 11 and returns to its original state, so that the position of the insulating protection seat 2 relative to the end plate body 1 can be restricted to a certain extent by the stopper protrusion 42, so that when the insulating protection seat 2 and the end plate body 1 are installed in place, the insulating protection seat 2 will not slip off the end plate body 1.

[0071] With this arrangement, the insulating protection seat 2 has a simple structure and is convenient to install with the end plate body 1 , and has a good effect of limiting the sliding distance of the end plate body 1 .

[0072] Reference Figures 4 to 7 As shown, when the guide portion 212 is provided on the slider 21 , for example, the stopper 4 can be provided on a side of the insulating protection seat 2 opposite to the guide portion 212 .

[0073] In some embodiments, reference Figures 1 to 6 As shown, the insulating protective seat 2 is also provided with a guide groove 22 extending along the expansion direction of the battery core. The end plate body 1 is also provided with a guide protrusion 12. The guide protrusion 12 extends into the guide groove 22 and slides along the extension direction of the guide groove 22 to guide the end plate body 1.

[0074] With such arrangement, the cooperation between the guide protrusion 12 and the guide groove 22 provides a good guiding effect on the sliding process of the end plate body 1 relative to the insulating protection seat 2, further improving the stability and reliability of the sliding cooperation between the two, thereby further avoiding the output pole from breaking or the weld failure between the battery cell and the output pole, and providing better protection for the output pole.

[0075] Exemplarily, when the slider 21 on the insulating protection seat 2 extends into the slide groove 111 on the end plate body 1 , the guide protrusion 12 also extends into the guide groove 22 at the same time to provide good guidance for the sliding fit between the slide groove 111 and the slider 21 .

[0076] In a specific implementation, the guide protrusion 12 can be, for example, a guide rib extending along the expansion direction of the battery cell, so that during the entire sliding process of the end plate body 1 and the insulating protective seat 2, the guide protrusion 12 can guide both of them well. In particular, when the end plate body 1 has two side walls 11 that are opposite and spaced apart, one of the side walls 11 is located between the battery cell and the other side wall 11, and the other side wall 11 is provided with the slide groove 111, the cooperation between the guide protrusion 12 and the guide groove 22 can improve the good guidance of the slider 21 when the end plate body 1 and the insulating protective seat 2 are installed.

[0077] Of course, in other embodiments, the guide groove 22 may also be provided on the end plate body 1 , and the guide protrusion 12 may be provided on the insulating protection seat 2 .

[0078] In some embodiments, reference Figures 2 to 4 As shown, a guide slope 221 may be provided at the notch of the guide groove 22, and the guide slope 221 extends in the direction along the guide protrusion 12 into the guide groove 22 (ie, Figure 5 The guide protrusion 12 extends inwardly in the direction of the one-way arrow A shown in the figure to improve the efficiency when the guide protrusion 12 extends into the guide groove 22, thereby improving the convenience of installing the insulation protection seat 2 and the end plate body 1.

[0079] In some embodiments, at least a portion of the outer peripheral surface of the guide protrusion 12 is disposed in contact with the groove wall of the guide groove 22. In other words, the shape of the guide protrusion 12 is adapted to the shape of the guide groove 22, which can improve the stability and reliability of the matching between the guide protrusion 12 and the guide groove 22 to a certain extent, thereby further improving the guiding effect to a certain extent.

[0080] This embodiment provides a battery module, including a cell end plate 100. The cell end plate 100 in this embodiment has the same structure and implementation principle as the cell end plate 100 provided in the above embodiment, and can bring the same or similar technical effects, and the description of the above embodiment can be referred to.

[0081] This embodiment provides a battery pack, including a battery module. The battery module in this embodiment has the same structure and implementation principle as the battery module provided in the above embodiment, and can bring the same or similar technical effects, and the description of the above embodiment can be referred to.

[0082] This embodiment provides a vehicle, including a battery module or a battery pack. The battery module or battery pack in this embodiment has the same structure and implementation principle as the battery module and battery pack provided in the above embodiment, and can bring the same or similar technical effects, and the description of the above embodiment can be referred to.

[0083] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0084] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An end plate for a battery cell, characterized in that: It includes an end plate body, an insulating protection seat and a sliding structure; The end plate body is used to be arranged on one side of the expansion direction of the battery core, and the insulating protective seat is used to be connected to the output pole of the battery core; The insulating protection seat is slidably connected to the end plate body along the expansion direction of the battery cell through the sliding structure, so that the end plate body can slide relative to the insulating protection seat along the expansion direction when the battery cell expands.

2. The end plate for a battery cell according to claim 1, characterized in that: The sliding structure comprises a slider and a slide groove, one of the slider and the slide groove is arranged on the end plate body, and the other of the slider and the slide groove is arranged on the insulating protection seat; The slide groove is extended along the expansion direction, and the sliding block extends into the slide groove and can slide back and forth along the extension direction of the slide groove.

3. The end plate for a battery cell according to claim 2, characterized in that: A side of the slide groove facing away from the insulating protection seat has a limiting surface, and the sliding block can abut against the limiting surface to prevent the sliding block from escaping from the slide groove.

4. The end plate for a battery cell according to claim 2, characterized in that: A guide portion extending along the expansion direction is provided at an end of the slider.

5. The end plate for a battery cell according to claim 4, characterized in that: The end plate body has two side walls arranged at intervals, one of which is located between the battery core and the other side wall; The slide groove is arranged on the other side wall, and a positioning hole is opened at a position of the side wall corresponding to the slide groove; At least a portion of the guide portion passes through the positioning hole, and a length of at least a portion of the guide portion is not less than a maximum expansion distance of the battery core.

6. The end plate for a battery cell according to any one of claims 1 to 4, characterized in that: The end plate body has two side walls arranged at intervals, one of which is located between the battery core and the other side wall; The insulating protection seat is provided with a blocking member, and at least a portion of the blocking member can protrude in a direction away from the insulating protection seat and can block a side of the other side wall facing the one side wall.

7. The end plate for a battery cell according to claim 6, characterized in that: The resisting member comprises an elastic arm and a resisting convex portion; One side of the elastic arm is connected to the insulating protection seat, and the other side of the elastic arm is formed as a free end with a deformation gap between the elastic arm and the insulating protection seat; The blocking protrusion is arranged at the free end and protrudes toward the other side wall.

8. The end plate for a battery cell according to any one of claims 1 to 5, characterized in that: A guide groove extending along the expansion direction of the battery core is also provided on one of the end plate body and the insulating protective seat; a guide protrusion is also provided on the other of the end plate body and the insulating protective seat; The guide protrusion extends into the guide groove and can slide along the extending direction of the guide groove.

9. A battery module, characterized in that: The invention comprises an end plate for a battery cell as claimed in any one of claims 1 to 8.

10. A battery pack, characterized in that: Comprising the battery module as claimed in claim 9.

11. A vehicle, characterized in that: Comprising the battery module as claimed in claim 9; or the vehicle comprises the battery pack as claimed in claim 10.

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