Battery and terminal equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a battery and terminal equipment, and the battery comprises a battery core assembly, a first end plate and a second end plate, the battery cell assembly comprises a plurality of battery cells, the plurality of battery cells are stacked along a first direction, and the battery cell assembly can be compressed along the first direction; first end plates are arranged at the two ends of the battery cell assembly in the first direction respectively, and first clamping parts are arranged at the two ends of each first end plate in the second direction respectively; a first end plate is arranged on the first end plate in the first direction, a second end plate is arranged at each of the two ends of the battery core assembly in the second direction, and a second clamping part is arranged at each of the two ends of each second end plate in the first direction. And the first end plate and the second end plate can restrain the battery core assembly, so that the pre-positioning operation can be completed without using additional restraining parts such as a steel belt, and the assembly cost of the battery is reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to batteries and terminal equipment. Background Technology

[0002] A pouch battery module is a battery module composed of lithium-ion battery cells encapsulated in flexible packaging materials. Compared with traditional hard-shell batteries, pouch cells have advantages such as being thinner and lighter, offering greater design flexibility, and higher energy density. The advantages of pouch cells are particularly evident in applications requiring high efficiency, lightweight design, and compact specifications.

[0003] Currently, the internal components of existing pouch battery modules are typically stacked with multiple cells and compressible pads. To improve the stability of the cells after installation, multiple cells need to be squeezed along the stacking direction before encapsulation. In the existing encapsulation method, in order to prevent the squeezed cells from recovering and making encapsulation impossible, steel strips are needed to bind the pouch battery module before installing the outer casing. The number of components required in the encapsulation process is large, which leads to a large number of encapsulation steps for pouch battery modules. Utility Model Content

[0004] In view of this, the present invention provides a battery and terminal device to solve the problem of multiple packaging steps in existing soft-pack battery modules.

[0005] In a first aspect, the present invention provides a battery having intersecting first and second directions. The battery includes: a cell assembly, a first end plate, and a second end plate. The cell assembly includes multiple cells stacked along the first direction, and the cell assembly can be compressed along the first direction. The cell assembly has a first end plate at each end along the first direction, and each first end plate has a first snap-fit ​​portion at each end along the second direction. The cell assembly has a second end plate at each end along the second direction, and each second end plate has a second snap-fit ​​portion at each end along the first direction. The first snap-fit ​​portion is used to snap-fit ​​with the second snap-fit ​​portion.

[0006] Beneficial effects: A first snap-fit ​​part is provided on the first end plate, and a second snap-fit ​​part is provided on the second end plate. The first end plate and the second end plate can be snap-fit ​​connected through their own structure. During battery assembly, the first end plate is placed at both ends of the cell assembly in the first direction. The first end plate and the cell assembly are pressed to a preset size by a pressing fixture. At this time, the second end plate is installed at both ends of the cell assembly in the second direction and snap-fit ​​connected to the first end plate. The first end plate and the second end plate can constrain the cell assembly. At this time, the pressing fixture can be removed to carry out subsequent connection steps. The pre-positioning operation can be completed without the use of additional constraint components such as steel strips. This effectively solves the problem of multiple packaging steps in existing soft-pack battery modules and reduces the battery assembly cost.

[0007] In one alternative embodiment, the battery further includes a first fastener, the first end plate is connected to the second end plate by the first fastener, one of the first end plate and the second end plate is provided with a first through hole, and the other is provided with a first connecting hole, the first through hole is used for the first fastener to pass through, and the first connecting hole is used for connection with the first fastener.

[0008] Beneficial effects: Based on the snap-fit ​​connection, the first end plate and the second end plate are further firmly connected by the first fastener. The connection method is simple and reliable, which effectively improves the assembly reliability of the first end plate and the second end plate.

[0009] In one optional embodiment, the first latching part is a slot, the first latching part is disposed on the wall surface of the first end plate away from the cell assembly, and the opening faces the side away from the cell assembly; the second latching part is a buckle; and / or, the first end plate has a first through hole, the second end plate has a first connecting hole, and the axes of the first through hole and the first connecting hole extend along a first direction.

[0010] Beneficial effects: The connection structure is simple and reliable, and easy to process and manufacture. In addition, since the first end plate and the second end plate are plate-shaped structures, the contact surface with the battery cell assembly is larger, which not only has a better binding effect, but also provides better protection for the battery cell assembly. Furthermore, the first through hole and the first connecting hole in this arrangement are unobstructed, making assembly easier.

[0011] In one optional embodiment, the battery further has a third direction, which intersects with the first direction and the second direction respectively; in the third direction, the side where the electrode of the cell is located is the connection side; the battery further includes a collection component and a bracket disposed on the connection side, the collection component is electrically connected to the electrode of the cell, the bracket extends along the first direction and is located between the collection component and the first end plate, the collection component is connected to two first end plates, and the collection component abuts against the corresponding first end plate through the collection component.

[0012] Beneficial effects: The bracket can support the acquisition component on the connection side, improving the stability and reliability of the acquisition component and making it easier to make electrical connections between the acquisition component and the electrode tab.

[0013] In one alternative embodiment, the battery further includes a second fastener, the bracket is connected to the first end plate via the second fastener, the bracket is provided with a second through hole for the second fastener to pass through, and the first end plate is provided with a second connecting hole on its end face along a third direction, the second connecting hole being used to cooperate with the second fastener.

[0014] Beneficial effects: The bracket connection method is simple, reliable and easy to disassemble, which can prevent the bracket from falling off or shifting before or when the acquisition component is installed or removed.

[0015] In one optional embodiment, a limiting groove is provided on the end face of the first end plate along the third direction, and the end of the bracket along the third direction is engaged with the limiting groove.

[0016] Beneficial effects: The limiting groove can effectively restrict the displacement of the bracket, making it easier to position and install the bracket.

[0017] In one alternative embodiment, the battery further includes a third fastener, the acquisition component is connected to the first end plate through the third fastener, the acquisition component is provided with a third through hole for the third fastener to pass through, and the first end plate is provided with a third connecting hole on the end face along a third direction, the third connecting hole is used to cooperate with the third fastener.

[0018] Beneficial effects: The connection method of the acquisition component is reliable, and it can be more convenient and quick to disassemble when the acquisition component needs to be inspected and maintained.

[0019] In one alternative embodiment, the cell assembly further includes an insulating pad; an insulating pad is provided between the cell assembly and the first end plate, and an insulating pad is provided between the cell assembly and the second end plate; and / or, along a third direction, an insulating pad is provided on the side of the cell assembly away from the connection side.

[0020] Beneficial effects: The insulating pad can not only effectively improve the safety of the battery and prevent the battery cell from directly contacting the first or second end plate, but also effectively improve the reliability of the side of the battery cell assembly away from the connection side.

[0021] In one alternative embodiment, among the multiple cells, every two adjacent cells form a cell group; the cell assembly further includes a pad, and a pad is provided between adjacent cell groups; and / or, the cell assembly further includes an isolation pad, and an isolation pad is provided between the tabs of two cells in a cell group.

[0022] Beneficial effects: The pads arranged in this way can better buffer the battery cells. When the battery is hit or vibrated, the pads can absorb energy and reduce the impact on the battery cells. In addition, the insulating pads can effectively prevent adjacent tabs from making contact and causing a short circuit.

[0023] Secondly, this utility model also provides a terminal device, which includes: a body having a mounting position; and the aforementioned battery, disposed in the mounting position and connected to the body. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is an explosion diagram of a battery according to an embodiment of the present utility model;

[0026] Figure 2 for Figure 1 A magnified view of point A on the battery shown;

[0027] Figure 3 for Figure 1 An exploded view of the first and second end plates of the battery shown.

[0028] Figure 4 for Figure 1 The top view of the assembled battery shown;

[0029] Figure 5 for Figure 1 The battery shown is a bottom view after assembly;

[0030] Figure 6 for Figure 1 The image shows a side view of the assembled battery.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Battery cell assembly; 101. Gasket; 102. Battery cell; 1021. Electrode tab; 103. Insulating pad; 104. Insulating pad;

[0033] 2. First end plate; 201. First snap-fit ​​part; 202. First connecting hole; 203. Second connecting hole; 204. Limiting groove; 205. Third connecting hole;

[0034] 3. Second end plate; 301. Second snap-fit ​​part; 302. First through hole;

[0035] 4. First fastener;

[0036] 5. Acquisition component; 501. Third through hole; 502. First interface; 503. Second interface;

[0037] 6. Bracket; 601. Second through hole;

[0038] 7. Second fastener; 8. Third fastener;

[0039] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0041] The following is combined with Figures 1 to 6 The following describes embodiments of the present invention.

[0042] According to an embodiment of the present invention, a battery is provided, having intersecting first direction X and second direction Y. The battery includes: a cell assembly 1, a first end plate 2, and a second end plate 3. The cell assembly 1 includes a plurality of cells 102, which are stacked along the first direction X. The cell assembly 1 can be compressed along the first direction X. The cell assembly 1 has a first end plate 2 at both ends along the first direction X, and each first end plate 2 has a first snap-fit ​​portion 201 at both ends along the second direction Y. The cell assembly 1 has a second end plate 3 at both ends along the second direction Y, and each second end plate 3 has a second snap-fit ​​portion 301 at both ends along the first direction X. The first snap-fit ​​portion 201 is used to snap-fit ​​with the second snap-fit ​​portion 301.

[0043] The battery of this embodiment has a first snap-fit ​​part 201 on the first end plate 2 and a second snap-fit ​​part 301 on the second end plate 3. The first end plate 2 and the second end plate 3 can be snap-fitted together by their own structure. When assembling the battery, the first end plate 2 is placed at both ends of the cell assembly 1 in the first direction X. The first end plate 2 and the cell assembly 1 are pressed together to a preset size by a pressing fixture. At this time, the second end plate 3 is installed at both ends of the cell assembly 1 in the second direction Y and snap-fitted together with the first end plate 2. The first end plate 2 and the second end plate 3 can constrain the cell assembly 1. At this time, the pressing fixture can be removed to carry out the subsequent connection steps. The pre-positioning operation can be completed without the use of additional constraint components such as steel strips. This effectively solves the problem of multiple packaging steps in existing soft-pack battery modules and reduces the assembly cost of the battery.

[0044] It should be noted that, in this embodiment, the first direction X refers to Figure 1 The middle arrow points to the direction of "X", and the second direction, Y, refers to... Figure 1 The direction indicated by the middle arrow "Y" is the third direction Z. Figure 1 The direction of "Z" indicated by the middle arrow.

[0045] Specifically, the specific structure of the first latching part 201 and the second latching part 301 is not limited. It can be a combination of a latch and a slot, a combination of a movable buckle and a slot, or a combination of a rail and a slot. It can be flexibly selected according to the requirements.

[0046] Furthermore, the compressibility of the battery cell assembly 1 is not limited. It can be that the battery cell assembly 1 is provided with a pad 101, and the battery cell assembly 1 is compressed by squeezing the pad 101 along the first direction X; or the battery cell 102 itself has a certain deformability, and the battery cell assembly 1 is compressed by compressing the battery cell 102 along the first direction X.

[0047] Preferably, a pad 101 is provided between at least two battery cells 102. The number of pads 101 is not limited. It can be one or interspersed between multiple battery cells 102. It can be flexibly adjusted as long as the battery cell assembly 1 can be compressed along the first direction X.

[0048] In one possible implementation, such as Figure 3 and Figure 5 As shown, the battery also includes a first fastener 4. The first end plate 2 is connected to the second end plate 3 through the first fastener 4. One of the first end plate 2 and the second end plate 3 is provided with a first through hole 302, and the other is provided with a first connecting hole 202. The first through hole 302 is used for the first fastener 4 to pass through, and the first connecting hole 202 is used to connect with the first fastener 4. Based on the snap-fit, the first end plate 2 and the second end plate 3 are further securely connected by the first fastener 4. The connection method is simple and reliable, and effectively improves the assembly reliability of the first end plate 2 and the second end plate 3.

[0049] It is understandable that, as an alternative implementation, the first end plate 2 and the second end plate 3 can also be connected by means of welding, riveting, etc.

[0050] Specifically, there is no limitation on the specific type of the first fastener 4; it can be a bolt, screw, fixing pin, etc., and can be flexibly selected according to the needs.

[0051] In one possible implementation, such as Figure 3 As shown, the first snap-fit ​​part 201 is a slot, which is disposed on the wall surface of the first end plate 2 away from the cell assembly 1, and the opening faces the side away from the cell assembly 1. The second snap-fit ​​part 301 is a buckle. The snap-fit ​​structure is simple and reliable, and easy to process and manufacture. In addition, since the first end plate 2 and the second end plate 3 are plate-shaped structures, the contact surface with the cell assembly 1 is larger, which not only has a better binding effect, but also can better protect the cell assembly 1.

[0052] Specifically, both the first latching portion 201 and the second latching portion 301 extend along the third direction Z.

[0053] The materials of the first end plate 2 and the second end plate 3 are not limited and can be plastic plates, metal plates, etc., but aluminum plates are preferred because they have low density, are lighter and have high thermal conductivity, which can improve the heat dissipation efficiency of the battery.

[0054] It is understood that, as an alternative implementation, the first snap-fit ​​portion 201 may be a snap-fit ​​and the second snap-fit ​​portion 301 may be a slot. In this form, the second snap-fit ​​portion 301 is located on the wall of the second end plate 3 away from the cell assembly 1.

[0055] Alternatively, as an alternative implementation, when the first latching part 201 is a slot, the first latching part 201 may also be provided on the end face of the first end plate 2 in the second direction Y.

[0056] In one possible implementation, the first end plate 2 has a first through hole 302, and the second end plate 3 has a first connecting hole 202. The axes of the first through hole 302 and the first connecting hole 202 extend along the first direction X. In this arrangement, the first through hole 302 and the first connecting hole 202 are unobstructed, making assembly easier.

[0057] The number of the first fastener 4 is not limited; it can be one or more, such as... Figure 1 As shown, this illustrates a configuration with eight first fasteners 4. The specific number of first fasteners 4 can be selected based on the required connection strength.

[0058] In one possible implementation, the battery also has a third direction Z, which intersects with the first direction X and the second direction Y respectively; on the third direction Z, the side where the tab 1021 of the cell 102 is located is the connection side; the battery also includes a collection component 5 and a bracket 6 disposed on the connection side, the collection component 5 is electrically connected to the tab 1021 of the cell 102, the bracket 6 extends along the first direction X and is located between the collection component 5 and the first end plate 2, the collection component 5 is connected to the two first end plates 2, the collection component 5 abuts against the corresponding first end plate 2 through the collection component 5, and the bracket 6 can support the collection component 5 on the connection side, improving the stability and reliability of the collection component 5, and making it easier to perform the electrical connection step between the collection component 5 and the tab 1021.

[0059] Specifically, there is no limitation on the way the bracket 6 and the first end plate 2 are fitted together; they can be mated together or connected by a connector. There is no limitation on the way the acquisition component 5 and the first end plate 2 are connected; they can be welded together or connected by a connector.

[0060] In one possible implementation, the battery further includes a second fastener 7. The bracket 6 is connected to the first end plate 2 via the second fastener 7. The bracket 6 is provided with a second through hole 601 for the second fastener 7 to pass through. The first end plate 2 is provided with a second connecting hole 203 on its end face along the third direction Z. The second connecting hole 203 is used to cooperate with the second fastener 7. The connection method of the bracket 6 is simple, reliable and easy to disassemble, which can prevent the bracket 6 from falling off or shifting before the acquisition component 5 is installed or when the acquisition component 5 is removed.

[0061] Specifically, there is no limitation on the specific type of the second fastener 7. It can be a bolt, screw, fixing pin, etc., and can be flexibly selected according to the needs.

[0062] The number of the second fastener 7 is not limited; it can be one or more, such as... Figure 1 As shown, this illustrates the case where four second fasteners 7 are provided. The specific number of first fasteners 4 can be selected according to the connection strength requirements.

[0063] In one possible implementation, a limiting groove 204 is provided on the end face of the first end plate 2 along the third direction Z. The end of the bracket 6 along the third direction Z is engaged with the limiting groove 204. The limiting groove 204 can effectively limit the displacement of the bracket 6, making it easier to position and install the bracket 6.

[0064] Specifically, such as Figure 2 As shown, the second connecting hole 203 is disposed in the limiting groove 204.

[0065] Furthermore, such as Figure 2 As shown, the thickness of the end of the bracket 6 along the third direction Z is greater than the thickness of the middle position, which can effectively improve the strength of the connection position of the bracket 6.

[0066] In one possible implementation, the battery further includes a third fastener 8. The acquisition component 5 is connected to the first end plate 2 via the third fastener 8. The acquisition component 5 is provided with a third through hole 501 for the third fastener 8 to pass through. The first end plate 2 is provided with a third connecting hole 205 on its end face along the third direction Z. The third connecting hole 205 is used to cooperate with the third fastener 8. The connection method of the acquisition component 5 is reliable. When the acquisition component 5 needs to be inspected and maintained, it can be removed more conveniently and quickly.

[0067] In one possible implementation, the cell assembly 1 further includes an insulating pad 103; the insulating pad 103 is provided between the cell assembly 1 and the first end plate 2, and between the cell assembly 1 and the second end plate 3. The insulating pad 103 can effectively improve the safety of the battery and prevent the cell 102 from directly contacting the first end plate 2 or the second end plate 3.

[0068] In one possible implementation, along the third direction Z, an insulating pad 103 is provided on the side of the cell assembly 1 away from the connection side, which can effectively improve the reliability of the side of the cell assembly 1 away from the connection side.

[0069] In one possible implementation, among the multiple cells 102, every two adjacent cells 102 form a cell group 102; the cell assembly 1 also includes a pad 101, and a pad 101 is provided between adjacent cell groups 102. The pad 101 arranged in this manner can better provide cushioning for the cell 102. When the battery is hit or vibrates, the pad 101 can absorb energy and reduce the impact on the cell 102.

[0070] Specifically, the pad 101 is a compressible pad.

[0071] In one possible implementation, the battery cell assembly 1 further includes an isolation pad 104. In a battery cell group 102, an isolation pad 104 is provided between the tabs 1021 of two battery cells 102, which can effectively prevent adjacent tabs 1021 from making contact and causing a short circuit.

[0072] Specifically, there is no limitation on the specific material of the isolation pad 104; it can be made of nylon, rubber, etc.

[0073] Preferably, the isolation pad 104 is foam.

[0074] In one possible implementation, the acquisition component 5 is provided with a through hole and a connecting copper busbar. The tab 1021 of the battery cell 102 passes through the through hole and is bent before being welded to the connecting copper busbar.

[0075] like Figure 5 As shown, the acquisition component 5 is also provided with a first interface 502 and a second interface 503. The first interface 502 is the power electrical interface of the acquisition component 5, and the second interface 503 is the acquisition and temperature measurement interface of the acquisition component 5.

[0076] According to an embodiment of the present invention, in another aspect, a terminal device is provided, comprising: a body and the aforementioned battery, the body having a mounting position; the battery being disposed in the mounting position and connected to the body.

[0077] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery having intersecting first direction (X) and second direction (Y), characterized in that, include: Battery cell assembly (1), first end plate (2), and second end plate (3); The battery cell assembly (1) includes a plurality of battery cells (102), which are stacked along the first direction (X), and the battery cell assembly (1) is compressible along the first direction (X); The battery cell assembly (1) has a first end plate (2) at both ends along the first direction (X), and each first end plate (2) has a first snap-fit ​​portion (201) at both ends along the second direction (Y). The battery cell assembly (1) has a second end plate (3) at both ends along the second direction (Y). Each second end plate (3) has a second snap-fit ​​portion (301) at both ends along the first direction (X). The first snap-fit ​​portion (201) is used to snap-fit ​​with the second snap-fit ​​portion (301).

2. The battery according to claim 1, characterized in that, The battery also includes a first fastener (4), the first end plate (2) is connected to the second end plate (3) through the first fastener (4), one of the first end plate (2) and the second end plate (3) is provided with a first through hole (302), and the other is provided with a first connection hole (202), the first through hole (302) is connected to the first fastener (4) through the first fastener (4).

3. The battery according to claim 2, characterized in that, The first snap-fit ​​part (201) is a slot, the first snap-fit ​​part (201) is disposed on the wall surface of the first end plate (2) away from the cell assembly (1), and the opening faces the side away from the cell assembly (1); the second snap-fit ​​part (301) is a buckle. And / or, the first end plate (2) has the first through hole (302), the second end plate (3) has the first connecting hole (202), and the axes of the first through hole (302) and the first connecting hole (202) extend along the first direction (X).

4. The battery according to any one of claims 1 to 3, characterized in that, The battery also has a third direction (Z), which intersects the first direction (X) and the second direction (Y) respectively; on the third direction (Z), the side where the tab (1021) of the cell (102) is located is the connection side; The battery also includes a collection component (5) and a bracket (6) disposed on the connection side. The collection component (5) is electrically connected to the tab (1021) of the cell (102). The bracket (6) extends along the first direction (X) and is located between the collection component (5) and the first end plate (2). The collection component (5) is connected to the two first end plates (2). The collection component (5) abuts against the corresponding first end plate (2) through the collection component (5).

5. The battery according to claim 4, characterized in that, The battery also includes a second fastener (7), the bracket (6) is connected to the first end plate (2) through the second fastener (7), the bracket (6) is provided with a second through hole (601) for the second fastener (7) to pass through, and the first end plate (2) is provided with a second connecting hole (203) on the end face along the third direction (Z), the second connecting hole (203) is used to cooperate with the second fastener (7).

6. The battery according to claim 4, characterized in that, The first end plate (2) is provided with a limiting groove (204) on the end face along the third direction (Z), and the end of the bracket (6) along the third direction (Z) is engaged with the limiting groove (204).

7. The battery according to claim 4, characterized in that, The battery also includes a third fastener (8), and the acquisition component (5) is connected to the first end plate (2) through the third fastener (8). The acquisition component (5) is provided with a third through hole (501) for the third fastener (8) to pass through. The first end plate (2) is provided with a third connecting hole (205) on the end face along the third direction (Z), and the third connecting hole (205) is used to cooperate with the third fastener (8).

8. The battery according to claim 4, characterized in that, The battery cell assembly (1) also includes an insulating pad (103); The insulating pad (103) is provided between the battery cell assembly (1) and the first end plate (2), and the insulating pad (103) is provided between the battery cell assembly (1) and the second end plate (3); And / or, along the third direction (Z), the insulating pad (103) is provided on the side of the cell assembly (1) opposite to the connection side.

9. The battery according to any one of claims 1 to 3, characterized in that, In the plurality of said cells (102), every two adjacent said cells (102) form a cell (102) group; The battery cell assembly (1) also includes a pad (101), and the pad (101) is provided between adjacent battery cell (102) groups; And / or, the cell assembly (1) further includes an isolation pad (104), wherein in a cell (102) group, an isolation pad (104) is provided between the tabs (1021) of two cells (102).

10. A terminal device, characterized in that, include: The fuselage has mounting positions; The battery according to any one of claims 1 to 9 is disposed in the mounting position and connected to the body.

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