Limiting side plate, battery module, battery pack and electric equipment

Abstract

The application discloses a limiting side plate for fixing an outgoing pole to a battery monomer, a battery module, a battery pack and a power utilization device. The limiting side plate comprises a plate body, a battery clamping part, an outgoing pole limiting groove and an outgoing pole fixing part. The battery clamping part is arranged on one side of the plate body facing the battery monomer and is used for clamping the limiting side plate to the battery monomer. The outgoing pole limiting groove is arranged on the other side of the plate body facing away from the battery monomer, the width of the outgoing pole limiting groove is the same as the thickness of a folded part of the outgoing pole, and the folded part of the outgoing pole is located in the outgoing pole limiting groove. The outgoing pole fixing part penetrates through the plate body and is used for fixing the outgoing pole to the battery monomer. By adopting the above design, the rotation of the outgoing pole can be limited without arranging a module end, and the flow area of the outgoing pole is not affected and limited.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a limiting side plate, a battery module, a battery pack, and an electrical device. Background Technology

[0002] In practical use, batteries require the leads to be fixed to individual battery cells. These leads are then bolted to the copper busbars of the battery cells, and limiting the lead's position during this process. Current technology uses a base fixed to the module end plate to prevent this limiting. To increase the bolt space between the leads and the copper busbars, clearance holes are needed. However, this design reduces the effective current-carrying area of ​​the leads. With increasing battery charge / discharge rates and capacities, this design becomes insufficient to meet current requirements and also fails to provide space for larger bolts, limiting industry development. Furthermore, the clearance hole design means that when the battery is compressed, the copper busbars are forced against the battery cell's aluminum casing. The blue film and end plate protective film can be punctured by the copper busbars, coming into contact with the battery and causing a short circuit. In extreme cases, this can lead to the battery's aluminum casing rupturing, causing a fire and posing a safety hazard.

[0003] Using a base fixed to the module end plate to bring out the limit position, when the battery capacity and charging rate are increased, in order to improve the overcurrent capacity and provide fixing space for larger bolts, the extension needs to be increased, that is, the thickness of the module end plate needs to be increased. The increase in the thickness of the module end plate will lead to an increase in the overall length of the module, a decrease in battery energy density, and an increase in end plate weight and cost, which is not conducive to the promotion of new energy batteries. Summary of the Invention

[0004] A primary objective of this application is to overcome at least one of the defects of the prior art and to provide a solution that eliminates the need for a module end plate, ensures that the overcurrent area of ​​the lead-out electrode is not affected by the thickness of the module end plate, and avoids the problem of aluminum shell cracking caused by the extrusion of the lead-out electrode and the aluminum shell.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] According to one aspect of this application, a limiting side plate is provided for fixing a lead to a battery cell. The limiting side plate includes a plate body, a battery engaging portion, a lead-out limit groove, and a lead-out fixing portion. The battery engaging portion is disposed on the side of the plate body facing the battery cell and is used to engage the limiting side plate with the battery cell. The lead-out limit groove is disposed on the side of the plate body facing away from the battery cell, and the width of the lead-out limit groove is the same as the thickness of the folded portion of the lead, with the folded portion of the lead located within the lead-out limit groove. The lead-out fixing portion penetrates the plate body and is used to fix the lead to the battery cell.

[0007] The limiting side plate provided in this application, by setting lead-out limit slots on the limiting side plate, can restrict the rotation of the leads without the need for a module end plate. Therefore, the current-carrying area of ​​the leads is not limited by the thickness of the module end plate, and there is no need to increase the thickness of the end plate to improve current-carrying capacity, thus reducing costs. Furthermore, it can prevent stress concentration in the lead thickness direction relative to the thinner aluminum shell when the battery is subjected to compression, thus avoiding aluminum shell breakage, preventing safety hazards, and improving power reliability.

[0008] According to one embodiment of this application, the battery latching portion includes a first battery latching portion and a second battery latching portion, wherein the first battery latching portion is disposed around the edge of the plate body; and the second battery latching portion is disposed on the center line of the area enclosed by the first battery latching portion.

[0009] In this application, by providing a first battery latching part and a second battery latching part, the limiting end plate can be firmly latched to the battery cell. The latching is performed around the battery cell and at the center, which can improve the firmness and stability of the latching between the limiting end plate and the battery cell.

[0010] According to one embodiment of this application, the limiting side plate further includes a drainage portion, the drainage portion corresponding to the position of the explosion-proof valve of the battery cell.

[0011] In this application, the inclusion of a flow-guiding section enables the high-temperature medium to flow out directionally through the flow-guiding section when a battery cell experiences thermal runaway, preventing it from randomly spreading to other battery cells or adjacent copper busbars or aluminum plates, thus avoiding inducing thermal runaway in other battery cells and causing a chain reaction.

[0012] According to one embodiment of this application, the limiting side plate further includes a partition portion disposed on the side of the plate body facing away from the battery cell, for separating adjacent leads.

[0013] In this application, a partition is provided between adjacent leads to provide insulation protection for the leads and prevent them from arcing face-to-face.

[0014] According to one embodiment of this application, a plane parallel to the lead-out limit slot is defined as a first plane, and the height of the projection of the partition portion onto the first plane is greater than the height of the projection of the lead-out electrode onto the first plane.

[0015] In this application, the partition is higher than the lead electrode, which can prevent the high-temperature medium sprayed from the explosion-proof valve from directly contacting the copper and aluminum busbars when the battery cell experiences thermal runaway, thus preventing secondary short circuits and inducing thermal diffusion of the entire system.

[0016] According to one embodiment of this application, the limiting side plate further includes a support portion disposed between the lead-out limit slot and the lead-out electrode fixing portion, for supporting the lead-out electrode.

[0017] In this application, a support portion is provided to ensure uniform force distribution on the leads, preventing the leads from squeezing the battery when the battery module is subjected to pressure, which could cause the aluminum casing of the battery to crack and thus create a safety hazard.

[0018] According to one embodiment of this application, the limiting side plate further includes a lead-out electrode protective cover, which is used to cover and protect the lead-out electrode.

[0019] In this application, a protective cover for the lead-out electrode is designed, which can further improve the safety performance of the lead-out electrode and ensure the safety of the battery.

[0020] According to one embodiment of this application, the limiting side plate further includes a first plate and a second plate, the first plate and the second plate being disposed opposite to each other, the first plate being provided with a first slot for a protective cover, the second plate being provided with a second slot for a protective cover, and the lead-out protective cover being engaged in the first slot and the second slot for a protective cover.

[0021] In this application, by setting a protective cover slot at an appropriate position, the protective cover can be locked onto the limiting side plate, thereby protecting the lead electrode.

[0022] According to another aspect of this application, a battery module is provided, including a battery cell, a limiting side plate, and a lead-out electrode, wherein the limiting side plate is located between the battery cell and the lead-out electrode, the lead-out electrode is fixed to the battery cell, and the limiting side plate is a limiting side plate as described above.

[0023] The battery module provided in this application, including the limiting side plate as described above, can ensure that the overcurrent area of ​​the lead electrode is not affected by the thickness of the module end plate, thus avoiding stress concentration caused by the lead electrode thickness direction being squeezed against the aluminum shell, which could lead to the aluminum shell cracking and thus cause a safety accident.

[0024] According to a third aspect of this application, a battery pack is provided, including a battery assembly, wherein the battery assembly includes the battery module described above.

[0025] According to a fourth aspect of this application, an electrical device is provided, including the battery pack described above.

[0026] As can be seen from the above technical solution, the advantages and positive effects of the limiting side plate proposed in this application are as follows:

[0027] The limiting side plate proposed in this application is used to fix the lead to a battery cell. The limiting side plate includes a plate body, a battery engaging portion, a lead-out limit groove, and a lead-out fixing portion. The battery engaging portion is provided on the side of the plate body facing the battery cell and is used to engage the limiting side plate with the battery cell. This enables the limiting side plate to engage with the battery cell and fix the limiting side plate to the battery cell. The lead-out limit groove is provided on the side of the plate body facing away from the battery cell. The width of the lead-out limit groove is the same as the thickness of the folded portion of the lead, and the folded portion of the lead is located in the lead-out limit groove. The design incorporates a limit slot with a width equal to the thickness of the folded portion of the lead-out electrode. This design effectively limits and secures the lead-out electrode during the copper busbar fixation process between the lead-out electrode and the battery cell. The lead-out electrode will not rotate with the fixing component, preventing stress on the lead-out electrode and avoiding stress on the terminal block through the weld between the lead-out electrode and the terminal block. This prevents the terminal block from cracking, causing seal failure, and potentially leading to battery leakage and fire. The lead-out electrode fixing portion penetrates the limiting side plate for securing the lead-out electrode to the battery cell.

[0028] The battery module proposed in this application includes a battery cell, a limiting side plate, and a lead-out electrode. The limiting side plate is located between the battery cell and the lead-out electrode, and the lead-out electrode is fixed to the battery cell. The limiting side plate adopts the limiting side plate described above. This can meet the overcurrent requirements of the lead-out electrode without increasing costs, and can also prevent aluminum shell breakage, avoid safety hazards, and improve the performance of the battery module.

[0029] The battery pack proposed in this application, using the aforementioned battery module, can meet overcurrent requirements, is safe and reliable, and is cost-effective.

[0030] The electrical equipment proposed in this application, using the aforementioned battery pack, can achieve a longer service life and higher safety performance. Attached Figure Description

[0031] The various objectives, features, and advantages of this application will become more apparent from the following detailed description of preferred embodiments in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of this application and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein:

[0032] Figure 1 This is a structural schematic diagram of the limiting side plate of this application.

[0033] Figure 2 This is a structural schematic diagram of the limiting side plate of this application from another angle.

[0034] Figure 3 This is a schematic diagram of the battery module of this application.

[0035] Figure 4This is the front view of the battery module of this application.

[0036] Figure 5 This is a top view of the battery module of this application.

[0037] Figure 6 This is a right view of the battery module of this application (where the fluid inlet and outlet of the liquid cooling plate are not shown).

[0038] Figure 7 This is a right view of the battery module (which acts as a lead-out electrode protection cover) of this application.

[0039] Figure 8 yes Figure 7 AA sectional view.

[0040] Figure 9 yes Figure 8 Enlarged view of section I in the middle.

[0041] The annotations in the attached figures are explained as follows:

[0042] 10. Limiting side plate;

[0043] 101.Plate body;

[0044] 11. Battery connector;

[0045] 111. First battery connector;

[0046] 112. Second battery connector;

[0047] 12. Draw out the limit slot;

[0048] 13. Lead-out electrode fixing part;

[0049] 14. Drainage section;

[0050] 15. Partition section;

[0051] 16. Support section;

[0052] 17. Lead-out electrode protective cover;

[0053] 171. Protective cover first slot;

[0054] 172. Second slot for the protective cover;

[0055] 18. First board;

[0056] 19. Second board;

[0057] 20. Lead-out pole;

[0058] 30. Battery cell;

[0059] 40. Liquid cooling plate;

[0060] 100. Battery module. Detailed Implementation

[0061] Typical embodiments embodying the features and advantages of this application will be described in detail in the following description. It should be understood that this application can have various variations in different embodiments, all of which do not depart from the scope of this application, and the descriptions and drawings therein are for illustrative purposes only and not intended to limit this application.

[0062] In the following description of various exemplary embodiments of this application, reference is made to the accompanying drawings, which form part of this application, and which illustrate by way of example different exemplary structures, systems, and steps that can implement various aspects of this application. It should be understood that other specific solutions to components, structures, exemplary devices, systems, and steps may be used, and structural and functional modifications may be made without departing from the scope of this application. In describing the elements / components / etc. described and / or illustrated herein, the terms “first,” “second,” and “third,” etc., are used to indicate the presence of one or more elements / components / etc. The terms “comprising,” “including,” and “having” are used to indicate an open-ended inclusion and mean that additional elements / components / etc. may exist in addition to those listed.

[0063] like Figures 1 to 9 As shown, the limiting side plate 10 of this application is used to fix the lead electrode 20 to the battery cell 30. The limiting side plate 10 includes a plate body 101, a battery latching part 11, a lead electrode limit groove 12, and a lead electrode fixing part 13. The battery latching part 11 is disposed on the side of the plate body 101 facing the battery cell 30, and is used to latch the limiting side plate 10 to the battery cell 30. The lead electrode limit groove 12 is disposed on the side of the plate body 101 facing away from the battery cell 30. The width of the lead electrode limit groove 12 is the same as the thickness of the folded portion of the lead electrode 20, and the folded portion of the lead electrode 20 is located in the lead electrode limit groove 12. The lead electrode fixing part 13 penetrates the plate body 101 and is used to fix the lead electrode 20 to the battery cell 30.

[0064] The limiting side plate provided in this application, by setting an exit limit slot on the limiting side plate, can achieve the elimination of the need for a module end plate. Specifically, the exit limit slot replaces the traditional module end plate, and the exit limit slot is integrally molded from the plate body of the limiting side plate. The exit electrode is set in the exit limit slot to limit the exit electrode, and the exit electrode is electrically connected to the terminal post of the battery cell. The periphery of the exit limit slot can restrict the rotation of the exit electrode. Compared with the overcurrent impact of using a module end plate on the exit electrode, the exit limit slot in this embodiment can ensure that the overcurrent area of ​​the exit electrode is not limited by the thickness of the module end plate, and at the same time, it is not necessary to increase the thickness of the end plate to improve the overcurrent capacity, thus increasing costs.

[0065] In this embodiment, as Figure 2 As shown, the battery latching portion 11 includes a first battery latching portion 111 and a second battery latching portion 112. The first battery latching portion 111 is disposed around the edge of the plate body 101; the second battery latching portion 112 is disposed on the center line of the area enclosed by the first battery latching portion 111. By providing the first battery latching portion and the second battery latching portion, the limiting end plate can be firmly latched to the battery cell. The latching is performed around the battery cell and at the center, which can improve the firmness and stability of the latching between the limiting end plate and the battery cell.

[0066] In this embodiment, the limiting side plate 10 also includes a drainage section 14, which corresponds to the position of the explosion-proof valve of the battery cell. The drainage section ensures that when a battery cell experiences thermal runaway, the high-temperature medium flows out directionally through the drainage section, preventing it from randomly spreading to other battery cells or adjacent copper busbars or aluminum plates, thus avoiding inducing thermal runaway in other battery cells and causing a chain reaction. It should be noted that the position of the drainage section corresponds one-to-one with the position of the battery explosion-proof valve.

[0067] In this embodiment, the limiting side plate 10 further includes a partition 15, which is disposed on the side of the plate 101 facing away from the battery cell 30, and is used to separate adjacent leads 20. The partition provided on the limiting side plate is used to separate adjacent leads, which can provide insulation protection for the leads and prevent them from arcing face-to-face.

[0068] In this embodiment, a plane parallel to the lead-out limit slot 12 is defined as the first plane, and the height of the projection of the partition 15 onto the first plane is greater than the height of the projection of the lead-out electrode 20 onto the first plane. The partition is higher than the lead-out electrode, which prevents the high-temperature medium ejected from the explosion-proof valve from directly contacting the copper or aluminum busbars when a battery cell experiences thermal runaway, thus avoiding secondary short circuits and preventing thermal diffusion throughout the system.

[0069] In this embodiment, the limiting side plate 10 further includes a support portion 16, which is disposed between the lead-out limit groove 12 and the lead-out electrode fixing portion 13, and is used to support the lead-out electrode 20. The support portion on the limiting side plate supports the lead-out electrode and also provides a blocking element between the lead-out electrode and the aluminum shell of the battery cell. This also prevents stress concentration in the lead-out electrode thickness direction and the thinner aluminum shell from causing the aluminum shell to break when the battery is subjected to pressure, thus avoiding safety hazards and improving power reliability.

[0070] In this embodiment, as Figures 3 to 9 As shown, the limiting side plate 10 also includes a lead-out electrode protection cover 17, which is used to cover and protect the lead-out electrode 20. The design of the lead-out electrode protection cover can further improve the safety performance of the lead-out electrode and ensure the safety of the battery.

[0071] In this embodiment, the limiting side plate 10 further includes a first plate 18 and a second plate 19, which are arranged opposite to each other. The first plate 18 is provided with a first protective cover slot 171, and the second plate 19 is provided with a second protective cover slot 172. The lead-out electrode protective cover 17 is engaged in the first protective cover slot 171 and the second protective cover slot 172. By setting the protective cover slots at appropriate positions, small protrusions can be provided on the edge of the protective cover. By having the small protrusions engage with the first and second protective cover slots, the protective cover can be engaged with the limiting side plate, thus protecting the lead-out electrode. It should be noted that the protective cover can also be engaged with the limiting side plate in other ways, such as by providing slots on the protective cover and small protrusions on the limiting side plate.

[0072] like Figures 3 to 9 As shown, this application also provides a battery module 100, including a battery cell 30, a limiting side plate 10, and a lead-out electrode 20. The limiting side plate 10 is located between the battery cell 30 and the lead-out electrode 20, and the lead-out electrode 20 is fixed to the battery cell 30. The limiting side plate 10 adopts the limiting side plate 10 described above. The battery module provided by this application can ensure that the current-carrying area of ​​the lead-out electrode is not affected by the thickness of the module end plate, avoiding stress concentration caused by the extrusion of the lead-out electrode thickness direction with the aluminum shell, which could lead to the aluminum shell cracking and thus cause a safety accident.

[0073] This application also provides a battery pack, including a battery assembly, wherein the battery assembly includes the aforementioned battery module.

[0074] This application also provides an electrical device that uses the aforementioned battery pack. The electrical device can take many forms, such as mobile phones, portable devices, laptops, electric vehicles, ships, spacecraft, electric toys, and power tools, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0075] It should be noted that the limiting side plates shown in the accompanying drawings and described in this specification are merely a few examples among many limiting side plates capable of employing the principles of this application. It should be clearly understood that the principles of this application are by no means limited to any detail or component of the limiting side plates shown in the accompanying drawings or described in this specification.

[0076] The above is a detailed description of several exemplary embodiments of the limiting side plate proposed in this application. The following will provide an exemplary description of the usage process of the limiting side plate proposed in this application.

[0077] Combined with appendix Figures 1 to 9 The process of using the limiting side plate proposed in this application is as follows: First, the battery latching part of the limiting side plate is aligned with the battery cell and latched onto the battery cell. Then, the lead is installed onto the side plate. At this time, the folded part of the lead is positioned in the lead-out limit groove of the limiting side plate, and the lead is supported on the support part of the limiting side plate. The fixing hole of the lead is aligned with the lead-out fixing part on the limiting side plate, and bolts or similar fasteners are used to fix the lead to the battery cell through the limiting side plate. Because the folded part of the lead is restricted within the groove by the lead-out limit groove of the limiting side plate, the lead will not rotate during the bolt fixing process. After the lead is fixed, the lead protective cover is snapped into the first and second locking grooves of the protective cover.

[0078] Through the above-described usage process of the limiting side plate of this application, it can be concluded that the limiting side plate of this application, by setting the lead-out limit groove, can limit the rotation of the lead-out electrode, avoiding the tearing of the battery terminal due to the rotation of the lead-out electrode, which could lead to the terminal being torn and the seal failing, resulting in electrolyte leakage and other safety risks. At the same time, the limiting of the lead-out electrode folding part ensures that the bolt can reach the design torque as required, preventing the lead-out electrode from being unable to be securely fixed by the bolt due to rotation, resulting in a loose connection with the copper busbar, which could then cause overheating. In extreme cases, a loose connection and overheating could cause the battery pack to catch fire.

[0079] The limiting side plate of this application also eliminates the need for a module end plate and the need to fix the leads to the module end plate. The current-carrying area of ​​the leads is not limited by the thickness of the module end plate. At the same time, the leads are flush with the vertical direction of the battery, and the leads are in large-area contact with the copper busbar of the battery. This avoids the leads being subjected to large-area force when they are squeezed during battery expansion, and prevents the aluminum shell from being crushed due to the concentrated extrusion force in the thickness direction of the leads and the relatively thin aluminum shell.

[0080] In summary, the limiting side plate proposed in this application is used to fix the lead to a battery cell. The limiting side plate includes a plate body, a battery engaging portion, a lead-out limit groove, and a lead-out fixing portion. The battery engaging portion is located on the side of the plate body facing the battery cell and is used to engage the limiting side plate with the battery cell. This enables the limiting side plate to engage with the battery cell and fix the limiting side plate to the battery cell. The lead-out limit groove is located on the side of the plate body facing away from the battery cell. The width of the lead-out limit groove is the same as the thickness of the folded portion of the lead, and the folded portion of the lead is located in the lead-out limit groove. The design incorporates a limit slot with a width equal to the thickness of the folded portion of the lead-out electrode. This design effectively limits and secures the lead-out electrode during the copper busbar fixation process between the lead-out electrode and the battery cell. The lead-out electrode will not rotate with the fixing component, preventing stress on the lead-out electrode and avoiding stress on the terminal block through the weld between the lead-out electrode and the terminal block. This prevents the terminal block from cracking, causing seal failure, and potentially leading to battery leakage and fire. The lead-out electrode fixing portion penetrates the limiting side plate for securing the lead-out electrode to the battery cell.

[0081] The limiting side plate of this application is also provided with a flow-draining section and a partition section, with the flow-draining section corresponding to the position of the battery's explosion-proof valve. The flow-draining section ensures that when a battery cell experiences thermal runaway, the high-temperature medium flows out directionally through the flow-draining section, preventing it from randomly spreading to other battery cells or adjacent copper busbars and aluminum plates, thus avoiding inducing thermal runaway in other battery cells and causing a chain reaction. The partition section between adjacent leads provides insulation protection for the leads, preventing face-to-face arcing and inducing thermal diffusion throughout the system.

[0082] The battery module proposed in this application includes a battery cell, a limiting side plate, and a lead-out electrode. The limiting side plate is located between the battery cell and the lead-out electrode, and the lead-out electrode is fixed to the battery cell. The limiting side plate adopts the limiting side plate described above. This can meet the overcurrent requirements of the lead-out electrode without increasing costs, and can also prevent aluminum shell breakage, avoid safety hazards, and improve the performance of the battery module.

[0083] The battery pack proposed in this application, using the aforementioned battery module, can meet overcurrent requirements, is safe and reliable, and has low cost.

[0084] The electrical equipment proposed in this application, using the aforementioned battery pack, can achieve a longer service life and higher safety performance.

[0085] The foregoing has described and / or illustrated exemplary embodiments of the limiting side plate and battery module, etc., proposed in this application. However, the embodiments of this application are not limited to the specific embodiments described herein; rather, components and / or steps of each embodiment may be used independently and separately from other components and / or steps described herein. Each component and / or step of one embodiment may also be used in combination with other components and / or steps of other embodiments. In describing the elements / components / etc. described and / or illustrated herein, the terms "a," "an," and "the above" are used to indicate the presence of one or more elements / components / etc.

[0086] The embodiments of this application are not limited to the specific embodiments described herein. Rather, components of each embodiment can be used independently and separately from other components described herein. Each component of one embodiment can also be used in combination with other components of other embodiments. In the description of the embodiments of the application, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the application.

[0087] In the description of this specification, the terms "one embodiment," "some embodiments," "other embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the claims. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0088] In the embodiments, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments according to the specific circumstances.

[0089] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. A limiting side plate for fixing the lead electrode to a battery cell, characterized in that, The limiting side plate includes: plate body; A battery latching part is provided on the side of the plate facing the battery cell, and is used to latch the limiting side plate to the battery cell; A lead-out limit slot is provided on the side of the plate facing away from the battery cell. The width of the lead-out limit slot is the same as the thickness of the folded portion of the lead electrode, and the folded portion of the lead electrode is located in the lead-out limit slot. A lead-out electrode fixing part penetrates the plate body and is used to fix the lead-out electrode to the battery cell; The limiting side plate also includes a support portion, which is disposed between the lead-out limit slot and the lead-out electrode fixing portion, and is used to support the lead-out electrode.

2. The limiting side plate as described in claim 1, characterized in that, The battery latching portion includes a first battery latching portion and a second battery latching portion. The first battery latching portion is disposed around the edge of the plate body; the second battery latching portion is disposed on the center line of the area enclosed by the first battery latching portion.

3. The limiting side plate as described in claim 1, characterized in that, The limiting side plate also includes a drainage section, which corresponds to the position of the explosion-proof valve of the battery cell.

4. The limiting side plate as described in claim 1, characterized in that, The limiting side plate also includes a partition portion, which is disposed on the side of the plate body facing away from the battery cell, and is used to separate adjacent leads.

5. The limiting side plate as described in claim 4, characterized in that, Define a plane parallel to the lead-out limit slot as a first plane, and the height of the projection of the partition portion onto the first plane is greater than the height of the projection of the lead-out electrode onto the first plane.

6. The limiting side plate as described in claim 1, characterized in that, The limiting side plate also includes a lead-out electrode protective cover, which is used to cover and protect the lead-out electrode.

7. The limiting side plate as described in claim 6, characterized in that, The limiting side plate also includes a first plate and a second plate, which are arranged opposite to each other. The first plate is provided with a first slot for a protective cover, and the second plate is provided with a second slot for a protective cover. The lead-out electrode protective cover is engaged in the first slot and the second slot of the protective cover.

8. A battery module, comprising a battery cell, a limiting side plate, and a lead, wherein the limiting side plate is located between the battery cell and the lead, and the lead is fixed to the battery cell, characterized in that, The limiting side plate is the limiting side plate as described in any one of claims 1-7.

9. A battery pack, comprising a battery assembly, characterized in that: The battery pack includes the battery module as described in claim 8.

10. An electrical appliance, characterized in that: Includes the battery pack as described in claim 9.

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