Battery pack and powered device

Abstract

The application provides a battery pack and a power consumption device. The battery pack comprises: a plurality of battery monomers; a plurality of buss bars; and a separation plate arranged on the top of the plurality of battery monomers, comprising a plurality of pole mounting slots with downward notches corresponding to the pole columns of the plurality of battery monomers, a slot hole is arranged on the bottom wall of each pole mounting slot, each pole column is arranged in the corresponding pole mounting slot, the notch edge of the pole mounting slot is arranged inside the top surface edge of the battery monomer where the corresponding pole column is arranged, the slot hole is arranged on the top of the corresponding pole column, the edge of the slot hole is arranged inside the top surface edge of the corresponding pole column, the plurality of buss bars are arranged on the top of the separation plate, and each buss bar is welded with the pole column connected therewith through the slot hole. The pole column is matched with the shape of the corresponding pole mounting slot; and / or the top surface of the pole column is attached to the lower surface of the bottom wall of the corresponding pole mounting slot; and / or the lower surface outside the notch of the pole mounting slot of the separation plate is attached to the top surface of the battery monomer. The power consumption device comprises the battery pack.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery pack and a power consumption device. BACKGROUND

[0002] In the prior art, during the welding of the busbar and the pole, the welding slag generated during the welding of the busbar and the pole will fall into the adjacent battery monomers, which may pierce the blue film between the battery monomers. If the blue film is pierced, the insulation and voltage resistance of the battery monomer will fail, and in severe cases, double-point insulation failure will occur, which may further cause safety risks.

[0003] The above statements are only used to provide background technical information related to the present application, and do not necessarily constitute the prior art. SUMMARY

[0004] The purpose of the present application is to provide a battery pack and a power consumption device, and to provide a safer battery pack.

[0005] The first aspect of the present application provides a battery pack, comprising: a plurality of battery monomers, the battery monomers comprising poles; a plurality of busbars, each busbar electrically connecting the plurality of battery monomers by connecting with the poles; and a separation plate arranged on the top of the plurality of battery monomers, comprising a plurality of pole mounting slots with downward grooves corresponding to each of the poles of the plurality of battery monomers, a slot hole being arranged on the bottom wall of each of the pole mounting slots, each of the poles being located in the corresponding pole mounting slot, the groove edge of the pole mounting slot being located inside the top surface edge of the battery monomer where the corresponding pole is located, the slot hole being located on the top of the corresponding pole, the edge of the slot hole being located inside the top surface edge of the corresponding pole, the plurality of busbars being arranged on the top of the separation plate, and each busbar being welded with the pole connected thereto through the slot hole. Wherein, the pole and the corresponding pole mounting slot are in shape cooperation; and / or the top surface of the pole is in contact with the lower surface of the bottom wall of the corresponding pole mounting slot; and / or the lower surface of the groove outside of the pole mounting slot of the separation plate is in contact with the top surface of the battery monomer.

[0006] In the battery pack of the embodiments of the present application, the isolation plate includes a plurality of pole post installation slots with notches downward corresponding to the pole posts of the plurality of battery monomers, a slot hole is arranged on the bottom wall of each pole post installation slot, each pole post is located in the corresponding pole post installation slot, the notch edge of the pole post installation slot is located inside the top surface edge of the battery monomer where the corresponding pole post is located, the slot hole is located on the top of the corresponding pole post, and the edge of the slot hole is located inside the top surface edge of the corresponding pole post in the isolation plate. When each tab is welded with the pole post connected thereto through the slot hole, the particulate matter generated can generally be limited in the slot hole and the top of the corresponding pole post. Even if a small amount of particulate matter enters the pole post installation slot through the gap between the slot hole and the pole post, it will also be limited in the pole post installation slot and on the top surface of the battery monomer, and will not basically enter the gap between the adjacent battery monomers, thereby facilitating the prevention of the particulate matter from entering the gap between the adjacent battery monomers, reducing the possibility of the particulate matter piercing the blue film between the battery monomers, and thereby reducing the safety risk caused by the piercing of the blue film.

[0007] The pole post and the pole post installation slot are matched in shape, which facilitates the minimization or elimination of the gap between the pole post and the pole post installation slot, prevents the particulate matter from entering the gap between the adjacent battery monomers through the gap between the pole post and the pole post installation slot, thereby reducing the possibility of the particulate matter piercing the blue film between the battery monomers, and further reducing the safety risk caused by the piercing of the blue film.

[0008] The top surface of the pole post and the bottom wall lower surface of the corresponding pole post installation slot are fitted, which facilitates the minimization or elimination of the gap between the top surface of the pole post and the bottom wall lower surface of the corresponding pole post installation slot, prevents the particulate matter from entering the gap between the adjacent battery monomers through the gap between the top surface of the pole post and the bottom wall lower surface of the corresponding pole post installation slot, thereby reducing the possibility of the particulate matter piercing the blue film between the battery monomers, and further reducing the safety risk caused by the piercing of the blue film.

[0009] The lower surface outside the notch of the pole post installation slot of the isolation plate and the top surface of the battery monomer are fitted, which facilitates the minimization or elimination of the gap between the lower surface outside the notch of the pole post installation slot of the isolation plate and the top surface of the battery monomer, prevents the particulate matter from entering the gap between the adjacent battery monomers through the gap between the lower surface outside the notch of the pole post installation slot of the isolation plate and the top surface of the battery monomer, thereby reducing the possibility of the particulate matter piercing the blue film between the battery monomers, and further reducing the safety risk caused by the piercing of the blue film.

[0010] In the battery pack in some embodiments, the isolation plate includes a plurality of tab installation slots corresponding one-to-one to the plurality of tabs, and each tab is installed in the corresponding tab installation slot.

[0011] The tab is installed in the tab installation slot, which is conducive to reducing the possibility of welding slag generated when one tab is welded with the corresponding pole post falling into the remaining slot holes, thereby facilitating the reduction of the possibility of particulate matter entering the gap between adjacent battery monomers to pierce the blue film between the battery monomers, and also facilitating the rapid positioning of the tab and the installation of the tab into the isolation plate.

[0012] In the battery pack in some embodiments, the tab includes a tab body and a protrusion protruding downward relative to the tab body, the tab body is located on the upper surface of the bottom wall of the pole post installation slot, and the protrusion is configured to extend into the slot hole and be welded with the pole post.

[0013] By connecting the protrusion with the pole post, it is conducive to the welding of the pole post and the tab, and also conducive to limiting the particulate matter generated by welding in the slot hole and on the top surface of the pole post, thereby preventing the particulate matter from entering the gap between adjacent battery monomers, thereby reducing the possibility of the particulate matter piercing the blue film between the battery monomers, and further reducing the safety risk caused by the piercing of the blue film.

[0014] In the battery pack in some embodiments, the protrusion is shaped to fit the slot hole; and / or the bottom surface of the protrusion is in contact with the top surface of the pole post; and / or the lower surface of the tab outside the protrusion is in contact with the upper surface of the bottom wall of the pole post installation slot.

[0015] The shape of the protrusion and the slot hole facilitates the accurate positioning of the tab and the corresponding pole post, so that the welding position between the tab and the pole post is accurate, which further facilitates the limitation of the particulate matter generated by welding in the slot hole and on the top surface of the pole post, effectively preventing the particulate matter from entering the gap between adjacent battery monomers, thereby reducing the possibility of the particulate matter piercing the blue film between the battery monomers, and further reducing the safety risk caused by the piercing of the blue film.

[0016] The bottom surface of the protrusion in contact with the top surface of the pole post facilitates the smooth completion of the welding of the tab and the pole post, reduces the welding time, and reduces the generation of welding particulate matter during welding, thereby facilitating the reduction of the possibility of particulate matter entering the gap between adjacent battery monomers to pierce the blue film between the battery monomers, and further reducing the safety risk caused by the piercing of the blue film.

[0017] The lower surface of the tab outside the protrusion is in contact with the upper surface of the bottom wall of the pole post installation slot, which facilitates the reduction of particulate matter entering the slot hole from the gap between the lower surface of the tab outside the protrusion and the upper surface of the bottom wall of the pole post installation slot during welding, thereby facilitating the reduction of the possibility of particulate matter entering the gap between adjacent battery monomers to pierce the blue film between the battery monomers, and further reducing the safety risk caused by the piercing of the blue film.

[0018] In the battery pack in some embodiments, the upper side of the protrusion forms a downwardly recessed recess.

[0019] The upper side of the protrusion forms a concave part concave downward, which is beneficial to limit the particles generated during welding of the tab and the corresponding pole column in the slot hole and on the top surface of the pole column, effectively prevent the particles from entering the gap between adjacent battery monomers, thereby reducing the possibility of particles piercing the blue film between the battery monomers, and further reducing the safety risk caused by the piercing of the blue film.

[0020] In the battery pack in some embodiments, the plurality of tabs includes: a first tab including two tab bodies arranged side by side in the front-rear direction, one protrusion provided on each tab body, and the first tab configured to connect two pole columns on the same side in the left-right direction of two battery monomers adjacent in the front-rear direction; and / or a second tab including two tab bodies arranged in the left-right direction and staggered in the front-rear direction, a bending part connecting the two tab bodies, and one protrusion provided on each tab body, and the second tab configured to connect two pole columns on opposite sides in the left-right direction of two battery monomers adjacent in the front-rear direction; and / or a third tab including one tab body and a first output pole connected to the tab body, one protrusion provided on the tab body, and the third tab configured to connect one pole column of the battery monomer adjacent to the circuit board and a first electrode connecting end of two electrode connecting ends of the circuit board; and / or a fourth tab including one tab body and a second output pole connected to the tab body, one protrusion provided on the tab body, and the fourth tab configured to connect one pole column of the battery monomer away from the circuit board and a second electrode connecting end of the two electrode connecting ends of the circuit board.

[0021] The first tab is used to connect the pole columns of two adjacent battery monomers in the front-rear direction. The second tab is used to connect the pole columns of two adjacent battery monomers in the left-right direction. The third tab is used to connect the battery monomer mounted on the rear side of the inner box body and the circuit board. The fourth tab is used to connect the battery monomer mounted on the front side of the inner box body and the circuit board. By providing different forms of tabs, it is beneficial to achieve the required electrical connection between the plurality of battery monomers and the circuit board, for example, by connecting an even number of battery monomers in series through a plurality of first tabs and one second tab, and then electrically connecting the even number of battery monomers and the two electrode connecting ends of the circuit board through the third tab and the fourth tab, respectively.

[0022] In the battery pack in some embodiments, the battery pack further comprises: a box body comprising a square outer box body and a square inner box body, a front side of the outer box body being open to form an inner box body mounting port, a rear wall of the outer box body being provided with an output port, the inner box body being pullably mounted in the outer box body along a front-rear direction from the inner box body mounting port, an upper side of the inner box body being open to form a battery mounting port, a plurality of battery monomers being mounted in the inner box body through the battery mounting port; a circuit board being electrically connected with the pole and being mounted between the rear wall of the outer box body and the rear wall of the inner box body; and an output terminal being mounted between the rear side of the circuit board and the rear wall of the outer box body and comprising an output pole interface, the output pole interface being electrically connected with the pole through the circuit board, and an output end of the output pole interface being exposed outside the side of the box body through the output port on the box body.

[0023] In the battery pack of the embodiments, the circuit board and the output terminal are both mounted on the side of the battery pack, the output end of the output pole interface of the output terminal is exposed outside the side of the box body through the output port on the box body, which is conducive to saving the space in the height direction of the battery pack, thereby saving the space in the height direction of the electric equipment such as an electric vehicle as a whole, and partially releasing the space in the height direction of the electric equipment occupied by the battery pack, thereby facilitating the reasonable arrangement of the related components around the battery pack in the electric equipment.

[0024] In the battery pack in some embodiments, the top wall, the bottom wall, the left side wall and the right side wall of the outer box body are closed; and / or the bottom wall, the front wall, the rear wall, the left side wall and the right side wall of the inner box body are closed.

[0025] By setting the outer box body to have the top wall, the bottom wall, the left side wall and the right side wall closed; and / or setting the inner box body to have the bottom wall, the front wall, the rear wall, the left side wall and the right side wall closed, the sealing performance of the box body is enhanced, and the overall strength and the anti-vibration capability of the box body are also improved.

[0026] In the battery pack in some embodiments, the circuit board is fixedly connected to the rear wall of the inner box body; and / or the rear wall of the inner box body is provided with a circuit board limiting structure configured to limit the relative position of the circuit board and the inner box body in at least one direction; and / or the output terminal is fixedly connected to the circuit board; and / or the output terminal is fixedly connected to the outer box body; and / or the outer box body comprises an output terminal mounting groove provided inside the rear wall of the outer box body and in communication with the output port, the output terminal being embedded in the output terminal mounting groove; and / or the output end of the output terminal extends to the outside of the rear of the outer box body from the output port; and / or the front end of the inner box body further comprises an ear plate.

[0027] The circuit board is fixedly connected to the rear side wall of the inner box body, which is beneficial to reduce the possibility of relative displacement of the circuit board due to vibration and the like with the inner box body, to form stable electrical connection between the circuit board and the battery monomer, and to facilitate continuous and stable operation of the battery pack.

[0028] The rear side wall of the inner box body is provided with a circuit board limiting structure, which limits and constrains the circuit board relative to the inner box body in at least one direction, which is beneficial to quickly position the relative position of the circuit board and the inner box body, thereby facilitating quick assembly of the circuit board, the inner box body and the battery monomer, and reducing the risk of misalignment of the circuit board and the inner box body, and maintaining stable electrical connection between the circuit board and the pole of the battery monomer, thereby facilitating continuous and stable operation of the battery pack.

[0029] The output terminal is fixedly connected to the circuit board, which is beneficial to maintain stable electrical connection between the output terminal and the pole of the battery monomer through the circuit board, thereby facilitating continuous and stable operation of the battery pack.

[0030] The output terminal is fixedly connected to the outer box body, which enhances the structural strength of the output terminal, reduces loosening of the output terminal due to vibration and external force, and facilitates continuous and stable power supply of the battery pack to the electrical device electrically connected to the output pole interface thereof.

[0031] The outer box body is provided with an output terminal mounting groove in communication with the output terminal opening, and the output terminal is embedded in the output terminal mounting groove, which is beneficial to quickly position and install the output terminal relative to the outer box body, and also beneficial to reduce the space occupied by the output terminal in the front-rear direction, thereby reducing the overall occupied space of the battery pack.

[0032] The output terminal extends from the output terminal opening to the rear outside of the outer box body, which is beneficial to quickly and accurately and stably electrically connect the battery pack and the electrical device supplied thereby, and to continuously and stably supply power of the battery pack to the electrical device electrically connected to the output pole interface thereof.

[0033] The front end outside of the inner box body is provided with an ear plate, which is beneficial to pull the inner box body in the outer box body forward and backward, thereby facilitating assembly and maintenance of the battery pack.

[0034] In some embodiments, the battery pack, the top end of the circuit board is provided with two electrode connecting ends extending forward on the left and right sides, respectively, the two electrode connecting ends are electrically connected with the positive pole and the negative pole of the pole column through the bar; and / or the circuit board limiting structure includes a positioning boss arranged at the bottom of the rear side wall of the inner box body, and the circuit board is arranged on the positioning boss; and / or the output terminal is fixedly connected to the outer box body and the circuit board through the same set of bolts extending into the outer box body from the outside of the outer box body; and / or the output terminal further includes a base plate, the output pole interface is connected to the rear side of the base plate, and the base plate is embedded in the output terminal mounting groove and matched with the shape of the output terminal mounting groove; and / or the output pole interface is matched with the shape of the output terminal opening; and / or the ear plate is provided with a through hole, and / or the plate surface of the ear plate is perpendicular to the up-down direction.

[0035] The top end of the circuit board is provided with two electrode connecting ends extending forward on the left and right sides, respectively, and the two electrode connecting ends are electrically connected with the positive pole and the negative pole of the pole column, which is beneficial to set sufficient safety distance between the positive pole and the negative pole of the battery pack, reduce the risk of short circuit of the positive pole and the negative pole caused by impact, vibration and the like, and improve the safety performance of the battery pack during operation.

[0036] The circuit board limiting structure includes a positioning boss arranged at the bottom of the rear side wall of the inner box body, and the positioning boss supports the circuit board, which is beneficial to quickly position and install the circuit board, reduce the possibility of relative movement between the circuit board and the inner box body in the up-down direction during operation of the battery pack, and stably electrically connect the circuit board with the battery cell. The positioning boss is also beneficial to protect the circuit board during assembly of the battery pack, preventing damage caused by collision between the circuit board and the outer box body.

[0037] The output terminal, the outer box body and the circuit board are fixedly connected through the same set of bolts, which is beneficial to improve the connection stability of the circuit board and the output terminal relative to the inner box body and the outer box body, realize more stable electrical connection of the circuit board, the output terminal and the battery cell, and facilitate continuous and stable operation of the battery pack.

[0038] The base plate is embedded in the output terminal mounting groove and matched with the shape of the output terminal mounting groove, which is beneficial to quickly and accurately position and match the output terminal with the outer box body, facilitate installation of the output terminal on the outer box body, and facilitate quick and accurate positioning and matching of the output pole interface with the output terminal opening.

[0039] The ear plate is provided with a through hole and / or the plate surface of the ear plate is perpendicular to the up-down direction, which is convenient for the operator to pull out the inner box body.

[0040] In the battery pack in some embodiments, the inner side of the outer box body is provided with a first guide structure, and the outer side of the inner box body is provided with a second guide structure, the second guide structure cooperating with the first guide structure to limit the movement of the inner box body relative to the outer box body in the front-rear direction.

[0041] By providing the first guide structure and the second guide structure to guide the movement of the inner box body relative to the outer box body in the front-rear direction, it is beneficial to quickly and accurately assemble or disassemble the inner box body from the outer box body, and it is also beneficial to reduce the lateral deviation of the inner box body relative to the outer box body due to vibration and impact, thereby further improving the overall structural strength of the box body.

[0042] In the battery pack in some embodiments, the outer box body forms a first mounting stopper at the mounting port of the inner box body, and the front end of the inner box body forms a second mounting stopper cooperating with the first mounting stopper; and / or the connection between the outer box body and the inner box body is sealingly connected by welding.

[0043] The first mounting stopper and the second mounting stopper cooperate, which is beneficial to enhance the overall structural strength of the box body and improve the sealing performance of the outer box body and the inner box body after mounting.

[0044] The connection between the outer box body and the inner box body is sealingly connected by welding, which is low in cost and good in sealing effect, and is also beneficial to further enhance the overall structural strength of the box body.

[0045] Another aspect of the present application provides a power consuming device, which comprises the battery pack as described above, and the battery pack is used to provide power for the power consuming device.

[0046] The power consuming device of the embodiments of the present application has the advantages of the battery pack of the embodiments of the present application.

[0047] The detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings will make other features and advantages of the present application clear. BRIEF DESCRIPTION OF DRAWINGS

[0048] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0049] Figure 1 The structure schematic diagram of the power consuming device of some embodiments of the present application.

[0050] Figure 2 The structure schematic diagram of the battery pack of some embodiments of the present application.

[0051] Figure 3 The structure schematic diagram of the battery pack of some embodiments of the present application. Figure 2A schematic view of a cross-sectional structure of the battery pack of the embodiment shown.

[0052] Figure 4 For Figure 2 A schematic view of an exploded structure of the battery pack in the embodiment shown.

[0053] Figure 5 For Figure 2 A schematic view of a partial structure of the battery pack in the embodiment shown.

[0054] Figure 6 For Figure 2 A schematic view of a structure of the battery cell in the battery pack of the embodiment shown.

[0055] Figure 7 For Figure 2 A schematic view of a structure of the outer case of the case in the battery pack of the embodiment shown.

[0056] Figure 8 For Figure 2 A schematic view of a structure of the inner case of the case in the battery pack of the embodiment shown.

[0057] Figure 9 For Figure 2 A schematic view of a structure of the output terminal in the battery pack of the embodiment shown.

[0058] Figure 10 For Figure 2 A schematic view of a structure of the circuit board in the battery pack of the embodiment shown.

[0059] Figure 11 For Figure 2 A schematic view of a structure of the isolation plate in the battery pack of the embodiment shown.

[0060] Figure 12 For Figure 2 A schematic view of a structure of the first gasket in the battery pack of the embodiment shown.

[0061] Figure 13 For Figure 2 A schematic view of a structure of the second gasket in the battery pack of the embodiment shown.

[0062] Figure 14 For Figure 2 A schematic view of a structure of the third gasket in the battery pack of the embodiment shown.

[0063] Figure 15 For Figure 2 A schematic view of a structure of the fourth gasket in the battery pack of the embodiment shown.

[0064] Figure 16 For Figure 2 A schematic view of a structure of the insulation plate in the battery pack of the embodiment shown.

[0065] Figure 17 For Figure 2 Structural schematic diagram of the buffer pad in the battery pack of the embodiment.

[0066] Figures 1 to 17 In the drawings, the reference signs represent respectively:

[0067] B, battery pack;

[0068] D, electrical equipment;

[0069] 10, battery cell; 11, pole; 111, positive pole; 112, negative pole;

[0070] 20, box body; 21, outer box body; 211, inner box body mounting port; 212, output end opening; 213, output terminal mounting groove; 214, guide groove; 22, inner box body; 221, battery mounting port; 222, positioning boss; 223, ear plate; 224, guide rail;

[0071] 30, output terminal; 31, base plate; 32, output pole interface; 321, output end;

[0072] 40, circuit board; 41, electrode connection end; 411, first electrode connection end; 412, second electrode connection end;

[0073] 50, isolation plate; 51, pole mounting groove; 511, slot hole; 52, gasket mounting groove;

[0074] 60, gasket; 601, first gasket; 602, second gasket; 603, third gasket; 604, fourth gasket; 61, protruding part; 62, bent part; 63, first output pole; 64, second output pole; 65, recessed part; 66, gasket body;

[0075] 70, insulation plate; 71, main plate body; 72, wing plate;

[0076] 80, buffer pad. DETAILED DESCRIPTION

[0077] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The following description of at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0078] The relative disposition of the components, numerical expressions, and numerical values set forth in these examples do not limit the scope of the present application unless otherwise specifically indicated. Also, it is to be understood that the dimensions of the various parts shown in the drawings are by no means limiting, and that the techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the specification where appropriate. In all of the examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Thus, other examples of the exemplary embodiments can have different values. It should be noted that like reference numerals and letters refer to like items in the several views of the drawings, and thus, once an item is defined in one view, it need not be discussed further in subsequent views.

[0079] In the description of the present application, it is necessary to understand that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be directly connected, or indirectly connected through intermediate medium. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0080] In the description of the present application, it should be understood that the use of the terms "first", "second", and the like to describe components should be understood merely to distinguish the corresponding components, and the above terms have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application.

[0081] In the description of the present application, it should be understood that the orientation words such as "horizontal", "up", "down", "front", "back", "left", "right", and the like indicate the orientation or positional relationship shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and in the absence of contrary statements, these orientation words do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inner" and "outer" refer to the inner and outer relative to the contour of the components themselves.

[0082] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0083] During the formation of the present application, the inventors found that the isolation plate of the battery pack in the related art is provided with a through hole corresponding to the shape and position of the pole of the battery cell, and the size of the through hole is larger than the pole. The isolation plate is installed on the upper part of the battery cell, the pole protrudes from the corresponding through hole, and then the pole is welded with the tab to form an electrical connection between the battery cells. Since there is a gap between the edge of the pole and the edge of the through hole, the welding slag generated during the welding of the tab and the pole can fall into the gap between the battery cells through the gap between the pole and the through hole, which may pierce the blue film between the battery cells, and the punctured blue film may cause the insulation voltage failure of the battery cell, and in severe cases, it may cause double-point insulation failure, which may further cause safety risks.

[0084] Based on this, the present application provides a battery pack, the isolation plate of the battery pack includes a plurality of pole mounting slots with downward notches corresponding to the poles of a plurality of battery cells, a slot hole is provided on the bottom wall of each pole mounting slot, each pole is located in the corresponding pole mounting slot, the notch edge of the pole mounting slot is located inside the top surface edge of the battery cell where the corresponding pole is located, the slot hole is located on the top of the corresponding pole, and the edge of the slot hole is located inside the top surface edge of the corresponding pole. When each tab is welded with the pole connected thereto through the slot hole, the generated particulate matter can generally be limited in the slot hole and the top of the corresponding pole. Even if a small amount of particulate matter enters the pole mounting slot through the gap between the slot hole and the pole, it will also be limited in the pole mounting slot and on the top surface of the battery cell, and will not basically enter the gap between the adjacent battery cells, thereby facilitating the prevention of particulate matter such as welding slag from entering the gap between the adjacent battery cells.

[0085] Further, the present application also provides a power consuming device comprising the battery pack.

[0086] The battery pack is configured to provide electrical energy to the power consuming device. The power consuming device can be, but is not limited to, a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric vehicle, a ship, a spacecraft, an electric toy, and an electric tool, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle, a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, and an electric plane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, for example, a power drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer.

[0087] The battery pack refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. The battery pack generally includes a box for packaging one or more battery cells. The box can avoid the influence of liquid or other foreign matters on the charging or discharging of the battery cell.

[0088] A battery cell refers to the smallest unit that constitutes a battery. In the present application, the battery cell can include a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the present application embodiment is not limited thereto. The battery cell can be in the shape of a flat body, a cuboid, or other shapes, and the present application embodiment is not limited thereto. The battery cell is generally packaged as a square battery cell and a soft-pack battery cell, and the present application embodiment is not limited thereto.

[0089] In the description of the present application, "front" and "rear" correspond to the left and right sides of Figure 5 respectively. "Up" and "down" correspond to the upper and lower sides of Figure 5 respectively, and also correspond to the up and down directions when the battery pack is installed and used. "Left" and "right" are the left and right directions when viewed from "front" to "rear". "Left" and "right" correspond to the rear side and the front side of Figure 5 respectively.

[0090] As shown in Figures 2 to 17 , the present application embodiment provides a battery pack B, which includes a plurality of battery cells 10, a plurality of busbars 60, and a separation plate 50. The battery cell 10 includes a pole 11. Each busbar 60 is electrically connected to the plurality of battery cells 10 by connecting to the pole 11. The separation plate 50 is disposed on the top of the plurality of battery cells 10 and includes a plurality of pole mounting grooves 51 with downwardly opening notches corresponding to each pole 11 of the plurality of battery cells 10. A groove hole 511 is provided on the bottom wall of each pole mounting groove 51. Each pole 11 is located in the corresponding pole mounting groove 51. The notch edge of the pole mounting groove 51 is located inside the top surface edge of the battery cell 10 where the corresponding pole 11 is located. The groove hole 511 is located on the top of the corresponding pole 11, and the edge of the groove hole 511 is located inside the top surface edge of the corresponding pole 11. The plurality of busbars 60 are disposed on the top of the separation plate 50, and each busbar 60 is welded to the pole 11 connected thereto through the groove hole 511. Among them, the pole 11 is matched in shape with the corresponding pole mounting groove 51; and / or the top surface of the pole 11 is in contact with the lower surface of the bottom wall of the corresponding pole mounting groove 51; and / or the lower surface outside the notch of the pole mounting groove 51 of the separation plate 50 is in contact with the top surface of the battery cell 10.

[0091] In the battery pack B of the embodiments of the present application, the isolation plate 50 includes a plurality of pole post mounting slots 51 with notched-down slots corresponding to the pole posts 11 of the plurality of battery monomers 10, a slot hole 511 is arranged on the bottom wall of each pole post mounting slot 51, each pole post 11 is located in the corresponding pole post mounting slot 51, the notched edge of the pole post mounting slot 51 is located inside the top surface edge of the battery monomer 10 where the corresponding pole post 11 is located, the slot hole 511 is located on the top of the corresponding pole post 11, the edge of the slot hole 511 is located inside the top surface edge of the corresponding pole post 11, when each tab 60 is welded with the pole post 11 connected thereto through the slot hole 511, the particulate matter generated can generally be limited in the slot hole 511 and the top of the corresponding pole post 11, even if a small amount of particulate matter enters the pole post mounting slot 51 through the gap between the slot hole 511 and the pole post 11, it will also be limited in the pole post mounting slot 51 and on the top surface of the battery monomer 10, and basically will not enter the gap between the adjacent battery monomers 10, thereby facilitating the prevention of particulate matter from entering the gap between the adjacent battery monomers 10, reducing the possibility of particulate matter piercing the blue film between the battery monomers 10, thereby reducing the safety risk caused by the piercing of the blue film.

[0092] The pole post 11 is matched with the pole post mounting slot 51, which facilitates minimizing or eliminating the gap between the pole post 11 and the pole post mounting slot 51, preventing particulate matter from entering the gap between the adjacent battery monomers 10 through the gap between the pole post 11 and the pole post mounting slot 51, thereby reducing the possibility of particulate matter piercing the blue film between the battery monomers 10, and further reducing the safety risk caused by the piercing of the blue film.

[0093] The top surface of the pole post 11 is in contact with the lower surface of the bottom wall of the corresponding pole post mounting slot 51, which facilitates minimizing or eliminating the gap between the top surface of the pole post 11 and the lower surface of the bottom wall of the corresponding pole post mounting slot 51, preventing particulate matter from entering the gap between the adjacent battery monomers 10 through the gap between the top surface of the pole post 11 and the lower surface of the bottom wall of the corresponding pole post mounting slot 51, thereby reducing the possibility of particulate matter piercing the blue film between the battery monomers 10, and further reducing the safety risk caused by the piercing of the blue film.

[0094] The lower surface of the notched outside of the pole post mounting slot 51 of the isolation plate 50 is in contact with the top surface of the battery monomer 10, which facilitates minimizing or eliminating the gap between the lower surface of the notched outside of the pole post mounting slot 51 of the isolation plate 50 and the top surface of the battery monomer 10, preventing particulate matter from entering the gap between the adjacent battery monomers 10 through the gap between the lower surface of the notched outside of the pole post mounting slot 51 of the isolation plate 50 and the top surface of the battery monomer 10, thereby reducing the possibility of particulate matter piercing the blue film between the battery monomers 10, and further reducing the safety risk caused by the piercing of the blue film.

[0095] The shapes of the battery cell 10, the pole 11, the pole mounting groove 51 and the slot hole 511 are not intended to be limited as long as the relevant requirements of the present application are met. For example, in the embodiment shown, the battery cell 10 is square, in an embodiment not shown, the battery cell 10 can also be of other shapes, for example, the battery cell 10 can be cylindrical. For another example, Figures 1 to 17 in the embodiment shown, the pole 11 of the battery cell 10 is square, in an embodiment not shown, the pole 11 can also be of other shapes, for example, cylindrical. For another example, Figures 1 to 17 in the embodiment shown, the pole 11 of the battery cell 10 is square, in an embodiment not shown, the pole 11 can also be of other shapes, for example, cylindrical. For another example, Figures 1 to 17 in the embodiment shown, the pole 11 of the battery cell 10 is square, in an embodiment not shown, the pole 11 can also be of other shapes, for example, cylindrical. For another example,

[0096] In some embodiments, as shown in Figure 5 the spacer plate 50 includes a plurality of gasket mounting grooves 52 corresponding to the plurality of gaskets 60, each gasket 60 is mounted in the corresponding gasket mounting groove 52.

[0097] The gasket 60 is mounted in the gasket mounting groove 52, which is beneficial to insulate between adjacent gaskets 60, and at the same time, it is beneficial to reduce the possibility of welding slag generated when one gasket 60 is welded with the corresponding pole 11 falling into the remaining slot holes 511, thereby reducing the possibility of particulate matter entering the gap between adjacent battery cells 10 and piercing the blue film between the battery cells 10. It is also beneficial to quickly position the gasket 60 and facilitate the installation of the gasket 60 into the spacer plate 50.

[0098] In some embodiments, as shown in Figures 12 to 15 the gasket 60 includes a gasket body 66 and a protrusion 61 protruding downward relative to the gasket body 66, the gasket body 66 is located on the upper side of the top surface of the bottom wall of the pole mounting groove 51, and the protrusion 61 is configured to extend into the slot hole 511 and be welded with the pole 11.

[0099] By connecting the protrusion 61 with the pole 11, it is beneficial to weld the pole 11 with the gasket 60, and it is also beneficial to limit the particulate matter generated by welding to the slot hole 511 and the top surface of the pole 11, which is beneficial to prevent the particulate matter from entering the gap between adjacent battery cells, thereby reducing the possibility of the particulate matter piercing the blue film between the battery cells, and further reducing the safety risk caused by the piercing of the blue film.

[0100] In some embodiments, as shown in Figure 2 and Figures 12 to 15 the protrusion 61 cooperates with the shape of the slot hole 511; and / or the bottom surface of the protrusion 61 is attached to the top surface of the pole 11; and / or the lower surface of the gasket body 66 on the outside of the protrusion 61 is attached to the upper surface of the bottom wall of the pole mounting groove 51.

[0101] The protrusion 61 and the slot hole 511 are shaped to facilitate accurate positioning of the tab 60 and the corresponding pole 11, to accurately position the welding between the tab 60 and the pole 11, and to further facilitate limiting the welding particles to the slot hole 511 and the top surface of the pole 11, effectively preventing the particles from entering the gap between the adjacent battery monomers 10, thereby reducing the possibility of the particles piercing the blue film between the battery monomers 10, and further reducing the safety risk caused by the piercing of the blue film.

[0102] The bottom surface of the protrusion 61 and the top surface of the pole 11 are fitted to facilitate the smooth completion of the welding of the tab 60 and the pole 11, reduce the welding time, and reduce the generation of welding particles during welding, thereby facilitating the reduction of the possibility of particles entering the gap between the adjacent battery monomers 10 and piercing the blue film between the battery monomers, and further reducing the safety risk caused by the piercing of the blue film.

[0103] The lower surface of the tab body 66 outside the protrusion 61 is fitted to the upper surface of the bottom wall of the pole mounting groove 51, which facilitates the reduction of particles entering the slot hole 511 from the gap between the lower surface of the tab body 66 outside the protrusion 61 and the upper surface of the bottom wall of the pole mounting groove 51 during welding, thereby facilitating the reduction of the possibility of particles entering the gap between the adjacent battery monomers 10 and piercing the blue film between the battery monomers 10, and further reducing the safety risk caused by the piercing of the blue film.

[0104] In some embodiments, the upper side of the protrusion 61 forms a downwardly recessed recess 65.

[0105] The upper side of the protrusion 61 forms a downwardly recessed recess 65, which facilitates the limitation of welding particles to the slot hole 511 and the top surface of the pole 11 during the welding of the tab 60 and the corresponding pole 11, effectively preventing the particles from entering the gap between the adjacent battery monomers 10, thereby reducing the possibility of the particles piercing the blue film between the battery monomers 10, and further reducing the safety risk caused by the piercing of the blue film.

[0106] The recess 65 is formed in the form of a blind hole. The tab 60 is fixedly connected to the corresponding pole 11 by laser welding, ultrasonic welding or other welding methods from one side of the blind hole. The side of the protrusion 61 away from the corresponding pole 11 forms a blind hole and is fixedly connected to the corresponding pole 11 by laser welding or ultrasonic welding. Laser welding or ultrasonic welding can achieve welding connection between the protrusion 61 and the pole 11 at the end of the blind hole, and the welding slag generated between the protrusion 61 and the pole 11 is less, thereby facilitating the reduction of the possibility of particles entering the gap between the adjacent battery monomers 10 and piercing the blue film between the battery monomers 10, and further reducing the safety risk caused by the piercing of the blue film.

[0107] In some embodiments, the plurality of tabs 60 includes: a first tab 601 configured to connect two pole posts 11 on the same side in the left-right direction of two battery cells 10 adjacent in the front-rear direction, the first tab 601 including two tab bodies 66 arranged in the front-rear direction and side by side in the left-right direction, and a protrusion 61 arranged on each tab body 66; and / or a second tab 602 configured to connect two pole posts 11 on the opposite sides in the left-right direction of two battery cells 10 adjacent in the front-rear direction, the second tab 602 including two tab bodies 66 arranged in the left-right direction and staggered in the front-rear direction, and a protrusion 61 arranged on each tab body 66; and / or a third tab 603 configured to connect one pole post 11 of a battery cell 10 adjacent to the circuit board 40 and a first electrode connecting end 411 of the two electrode connecting ends 41 of the circuit board 40, the third tab 603 including one tab body 66 and a first output pole 63 connected to the tab body 66, and a protrusion 61 arranged on the tab body 66; and / or a fourth tab 604 configured to connect one pole post 11 of a battery cell 10 away from the circuit board 40 and a second electrode connecting end 412 of the two electrode connecting ends 41 of the circuit board 40, the fourth tab 604 including one tab body 66 and a second output pole 64 connected to the tab body 66, and a protrusion 61 arranged on the tab body 66.

[0108] The first tab 601 is used to connect the pole posts 11 of two adjacent battery cells 10 in the front-rear direction. The second tab 602 is used to connect the pole posts 11 of two adjacent battery cells 10 in the left-right direction. The third tab 603 is used to connect, for example, a battery cell 10 mounted on the rear side of the inner box 22 and the circuit board 40. The fourth tab 604 is used to connect, for example, a battery cell 10 mounted on the front side of the inner box 22 and the circuit board 40. By providing tabs 60 of different forms, it is facilitated to achieve the required electrical connection between the plurality of battery cells 10 and the circuit board 40, for example, connecting an even number of battery cells 10 in series by a plurality of first tabs 601 and one second tab 602, and then electrically connecting the even number of battery cells 10 and the two electrode connecting ends 41 of the circuit board 40 by the third tab 603 and the fourth tab 604, respectively.

[0109] In some embodiments, as Figures 2 to 4As shown, battery pack B also includes a housing 20, a circuit board 40, and an output terminal 30. The housing 20 includes a square outer housing 21 and a square inner housing 22. The front of the outer housing 21 is open to form an inner housing mounting opening 211. An output terminal opening 212 is provided on the rear side wall of the outer housing 21. The inner housing 22 is removably installed into the outer housing 21 through the inner housing mounting opening 211 in a front-to-back direction. The upper side of the inner housing 22 is open to form a battery mounting opening 221, through which multiple battery cells 10 are installed into the inner housing 22. The circuit board 40 is electrically connected to the terminal post 11 and is installed between the rear side wall of the outer housing 21 and the rear side wall of the inner housing 22. The output terminal 30 is installed between the rear side of the circuit board 40 and the rear side wall of the outer housing 21. The output terminal 30 includes an output electrode interface 32, which is electrically connected to the electrode post 11 via a circuit board 40, and the output end 321 of the output electrode interface 32 is exposed to the outside of the side of the housing 20 through the output end opening 212 on the housing 20.

[0110] Since both the circuit board 40 and the output terminal 30 are installed at the rear of the battery pack B, the output end 321 of the output terminal 30's output terminal interface 32 is exposed to the rear outer side of the housing 20 through the output end opening 212 on the housing 20. This saves space in the height direction of the battery pack B, thereby saving space in the height direction of electrical equipment such as electric vehicles. It can partially free up the height direction space occupied by the battery pack B in the electrical equipment, thus facilitating the rational arrangement of related components around the battery pack B in the electrical equipment. Dividing the housing 20 into an outer housing 21 and a pull-out inner housing 22 optimizes the structural strength of the battery pack B, enhances its resistance to compression, vibration, and impact, and helps prevent the battery pack B from being damaged by strong vibrations, thereby reducing the safety risks of the battery pack B. After the inner housing 22 is disassembled from the outer housing 21, it can be pulled out from the outer housing 21, facilitating the inspection and replacement of battery cells 10 or other components, thus reducing the maintenance difficulty and cost of the battery pack B. The rear sidewall of the inner casing 22 physically isolates the circuit board 40 from the battery cell 10, reducing interference and influence between them. The output terminal 30 is installed between the rear side of the circuit board 40 and the rear sidewall of the outer casing 21, which helps prevent damage to the circuit board 40 and the output terminal 30 during battery pack B assembly and provides protection for the circuit board 40 and the output terminal 30 after battery pack B is assembled.

[0111] In some embodiments, such as Figures 2 to 5 , Figure 7 and Figure 8 As shown, the top wall, bottom wall, left side wall and right side wall of the outer casing 21 are closed; and / or the bottom wall, front side wall, rear side wall, left side wall and right side wall of the inner casing 22 are closed.

[0112] By setting the outer enclosure 21 to be enclosed by the top wall, bottom wall, left side wall and right side wall; and / or setting the inner enclosure 22 to be enclosed by the bottom wall, front side wall, rear side wall, left side wall and right side wall, it is beneficial to enhance the sealing performance of the enclosure 20, and also to increase the overall strength and vibration resistance of the enclosure 20.

[0113] In some embodiments, such as Figures 2 to 5 , Figure 7 and Figure 8 As shown, the circuit board 40 is fixedly connected to the rear side wall of the inner housing 22; and / or the rear side wall of the inner housing 22 is provided with a circuit board limiting structure, which is configured to limit the relative position of the circuit board 40 and the inner housing 22 in at least one direction; and / or the output terminal 30 is fixedly connected to the circuit board 40; and / or the output terminal 30 is fixedly connected to the outer housing 21; and / or the outer housing 21 includes an output terminal mounting groove 213, which is located on the inner side of the rear side wall of the outer housing 21 and communicates with the output end opening 212, and the output terminal 30 is embedded in the output terminal mounting groove 213; and / or the output end 321 extends from the output end opening 212 to the rear outer side of the outer housing 21; and / or the front outer side of the inner housing 22 also includes an ear plate 223.

[0114] The circuit board 40 is fixedly connected to the rear side wall of the inner box 22, which helps to reduce the possibility of relative displacement between the circuit board 40 and the inner box 22 due to vibration, and helps the circuit board 40 to form a stable electrical connection with the battery cell 10, thereby facilitating the continuous and stable operation of the battery pack B.

[0115] The rear side wall of the inner casing 22 is provided with a circuit board limiting structure. The circuit board limiting structure limits and constrains the circuit board 40 relative to the inner casing 22 in at least one direction, which is conducive to quickly positioning the relative position of the circuit board 40 and the inner casing 22. This facilitates the rapid assembly of the circuit board 40, the inner casing 22, and the battery cell 10, and also helps to reduce the risk of misalignment between the circuit board 40 and the inner casing 22. It also helps to maintain a stable electrical connection between the circuit board 40 and the terminal post 11 of the battery cell 10, thereby facilitating the continuous and stable operation of the battery pack B.

[0116] The output terminal 30 is fixedly connected to the circuit board 40, which facilitates the stable electrical connection between the output terminal 30 and the terminal post 11 of the battery cell 10 through the circuit board 40, thereby facilitating the continuous and stable operation of the battery pack B.

[0117] The output terminal 30 is fixedly connected to the outer casing 21, which enhances the structural strength of the output terminal 30, helps to reduce the loosening of the output terminal 30 due to vibration and external force, and facilitates the continuous and stable supply of power from the battery pack B to the electrical device electrically connected to its output terminal interface 32.

[0118] The outer box body 21 is provided with an output terminal mounting groove 213 in communication with the output opening 212, and the output terminal 30 is embedded in the output terminal mounting groove 213, which facilitates quick positioning and installation of the output terminal 30 relative to the outer box body 21, and also facilitates reduction of the space occupied by the output terminal 30 in the front-rear direction, thereby facilitating reduction of the overall occupied space of the battery pack B.

[0119] The output end 321 extends from the output opening 212 to the outside of the rear of the outer box body 21, which facilitates quick, accurate and stable electrical connection of the battery pack B to the electrical device supplied by the battery pack B, and facilitates continuous and stable power supply of the battery pack B to the electrical device electrically connected to the output pole interface 32 of the battery pack B.

[0120] The front end of the inner box body 22 is provided with an ear plate 223, which facilitates pulling of the inner box body 22 in the outer box body 21 in the front-rear direction, thereby facilitating assembly and maintenance of the battery pack B.

[0121] In some embodiments, as shown in Figures 2 to 10 the top end of the circuit board 40 is provided with two electrode connecting ends 41 extending forward on both sides, respectively, and the two electrode connecting ends 41 are electrically connected to the positive pole column 111 and the negative pole column 112 in the pole column 11 through the tab 60, respectively; and / or the circuit board limiting structure includes a positioning boss 222 provided at the bottom of the rear side wall of the inner box body 22, and the circuit board 40 is arranged on the positioning boss 222; and / or the output terminal 30 is fixedly connected to the outer box body 21 and the circuit board 40 through the same set of bolts extending into the outer box body 21 from the outside of the outer box body 21; and / or the output terminal 30 further includes a base plate 31, and the output pole interface 32 is connected to the rear side of the base plate 31, and the base plate 31 is embedded in the output terminal mounting groove 213 and cooperates with the shape of the output terminal mounting groove 213; and / or the output pole interface 32 cooperates with the shape of the output opening 212; and / or the ear plate 223 is provided with a through hole, and / or the plate surface of the ear plate 223 is perpendicular to the up-down direction.

[0122] The top end of the circuit board 40 is provided with two electrode connecting ends 41 extending forward on both sides, respectively, and the two electrode connecting ends 41 are electrically connected to the positive pole column 111 and the negative pole column 112 in the pole column 11, respectively, which facilitates setting of a sufficient safety distance between the positive pole and the negative pole of the battery pack B, reduces the risk of short circuit of the positive pole and the negative pole due to impact, vibration and the like, and facilitates improvement of the safety performance of the battery pack B during operation.

[0123] The circuit board limiting structure comprises a positioning boss 222 arranged at the bottom of the rear side wall of the inner box body 22, which supports the circuit board 40, facilitates quick positioning and installation of the circuit board 40, reduces the possibility of relative movement of the circuit board 40 and the inner box body 22 in the up-down direction during operation of the battery pack B, and facilitates stable electrical connection between the circuit board 40 and the battery cell 10. Arranging the positioning boss 222 also facilitates protection of the circuit board 40 during assembly of the battery pack B, preventing damage to the circuit board 40 due to bumping with the outer box body 21.

[0124] The output terminal 30, the outer box body 21 and the circuit board 40 are fixedly connected by the same set of bolts, which facilitates improvement of the connection stability of the circuit board 40 and the output terminal 30 relative to the inner box body 22 and the outer box body 21, enables more stable electrical connection of the circuit board 40, the output terminal 30 and the battery cell 10, and facilitates continuous and stable operation of the battery pack B.

[0125] The substrate 31 is embedded in the output terminal mounting groove 213 and cooperates with the shape of the output terminal mounting groove 213, which facilitates quick and accurate positioning and cooperation of the output terminal 30 and the outer box body 21, facilitates installation of the output terminal 30 on the outer box body 21, and also facilitates quick and accurate positioning and cooperation of the output terminal 30 and the output terminal opening 212.

[0126] The ear plate 223 is provided with a through hole and / or the plate surface of the ear plate 223 is perpendicular to the up-down direction, which facilitates pulling out of the inner box body 22 by an operator.

[0127] In some embodiments, as shown in Figure 4 , Figure 7 and Figure 8 , a first guide structure is arranged on the inner side of the outer box body 21. A second guide structure is arranged on the outer side of the inner box body 22. The second guide structure cooperates with the first guide structure to limit movement of the inner box body 22 relative to the outer box body 21 in the front-rear direction.

[0128] The first guide structure and the second guide structure provide guidance in the front-rear direction for movement of the inner box body 22 relative to the outer box body 21, which facilitates quick and accurate installation of the inner box body 22 in the outer box body 21 or removal of the inner box body 22 from the outer box body 21, and also facilitates reduction of left-right direction deviation of the inner box body 22 relative to the outer box body 21 due to vibration and impact, and facilitates further improvement of the overall structural strength of the box body 20.

[0129] In some embodiments, as shown in Figure 4 , Figure 7 and Figure 8As shown, one of the first guide structure and the second guide structure comprises a guide groove 214 arranged along the front-rear direction, and the other of the first guide structure and the second guide structure comprises a guide rail 224 in sliding fit with the guide groove 214; and / or one of the first guide structure and the second guide structure is arranged on the inner side of the bottom wall of the outer box body 21, and the other of the first guide structure and the second guide structure is arranged on the outer side of the bottom wall of the inner box body 22.

[0130] The guide groove 214 and the guide rail 224 form a sliding pair, which facilitates the more stable movement of the inner box body 22 relative to the outer box body 21 along the front-rear direction, facilitates the stable installation of the inner box body 22 in the outer box body 21 or the removal of the inner box body 22 from the outer box body 21, and also facilitates the more effective restriction of the lateral displacement of the inner box body 22 relative to the outer box body 21 due to vibration or impact, thereby further improving the overall structural strength of the box body 20.

[0131] One of the first guide structure and the second guide structure is arranged on the inner side of the bottom wall of the outer box body 21, and the other of the first guide structure and the second guide structure is arranged on the outer side of the bottom wall of the inner box body 22, which facilitates the stable fit of the first guide structure and the second guide structure during the movement of the inner box body 22 relative to the outer box body 21, and facilitates the quick assembly of the inner box body 22 and the outer box body 21.

[0132] In some embodiments, as shown in Figure 4 , Figure 7 and Figure 8 , the outer box body 21 forms a first installation stopper at the inner box body installation opening 211, and the front end of the inner box body 22 forms a second installation stopper in fit with the first installation stopper; and / or the connection between the outer box body 21 and the inner box body 22 is sealingly connected by welding.

[0133] The fit of the first installation stopper and the second installation stopper facilitates the enhancement of the overall structural strength of the box body 20, and also facilitates the improvement of the sealing performance of the outer box body 21 and the inner box body 22 after installation.

[0134] The sealing connection of the connection between the outer box body 21 and the inner box body 22 by welding has low cost and good sealing effect, and also facilitates the further enhancement of the overall structural strength of the box body 20.

[0135] In some embodiments, as shown in Figure 3 , Figure 4 and Figure 16 , the battery pack B further comprises an insulating plate 70, which is located between the battery monomer 10 and the inner box body 22.

[0136] The arrangement of the insulating plate 70 separates the battery monomer 10 and the inner box body 22, which facilitates the reduction of the possibility of electric leakage through the inner box body 22.

[0137] In some embodiments, as shown in Figure 3 ,Figure 4 and Figure 17 As shown, battery pack B also includes a buffer pad 80, which is disposed between the battery cell 10 and the insulating plate 70.

[0138] The buffer pad 80 is provided to reduce the impact of vibration on the battery cell 10 and to reduce bumps during installation of the battery cell 10.

[0139] In some embodiments, such as Figure 3 , Figure 4 and Figure 16 As shown, the horizontal cross-section of the insulating plate 70 is U-shaped, including a main body 71 and two wing plates 72 connected to the left and right ends of the main body 71 respectively. The main body 71 is located between the battery cell 10 and the inner box 22. The buffer pad 80 is disposed between the battery cell 10 and the main body 71, and the two wing plates 72 are disposed between the battery cell 10 and the inner box 22 respectively.

[0140] The horizontal cross-section of the insulating plate 70 is U-shaped, which helps to better isolate the battery cell 10 and the inner casing 22, and helps to more effectively reduce the possibility of leakage through the inner casing 22.

[0141] This application embodiment also provides an electrical device D, such as... Figure 1 As shown, the electrical device D includes a battery pack B according to an embodiment of this application, which is used to provide power to the electrical device D.

[0142] The electrical device D in this application embodiment has the advantages of the battery pack B in this application embodiment.

[0143] The following is combined Figures 1 to 17 The structure of the battery pack B and the electrical device D of some embodiments of this application will be described in more detail.

[0144] like Figure 1 As shown, electrical equipment D includes battery pack B, which provides power to electrical equipment D. Electrical equipment D is a vehicle, and battery pack B is the vehicle's low-voltage battery pack, which is used for low-voltage power supply, vehicle starting, regenerative braking, automatic start-stop, etc.

[0145] like Figures 2 to 5 As shown, battery pack B includes multiple battery cells 10, housing 20, output terminals 30, circuit board 40, isolation plate 50, multiple battery pads 60, insulation plate 70, and buffer pad 80.

[0146] like Figure 4 and Figure 6 As shown, each battery cell 10 includes two terminals 11, namely a positive terminal 111 and a negative terminal 112. Multiple battery cells 10 are arranged in a row along the front-to-back direction.

[0147] As shown in Figures 3 to 5 , Figure 7 and Figure 8 , the box 20 includes an outer box 21 and an inner box 22. The top wall, bottom wall, left side wall and right side wall of the outer box 21 are closed. The front side of the outer box 21 is open to form an inner box mounting port 211. The rear side wall of the outer box 21 is provided with an output terminal opening 212. The inner box 22 is pullably mounted in the outer box 21 along the front-rear direction from the inner box mounting port 211, so that the inner box 22 and the outer box 21 form a drawer-type combined structure. The bottom wall, front side wall, rear side wall, left side wall and right side wall of the inner box 22 are closed. The upper side of the inner box 22 is open to form a battery mounting port 221. A plurality of battery monomers 10 are mounted in the inner box 22 through the battery mounting port 221. The outer box 21 includes one guide groove 214 provided on the inner side of the bottom wall of the outer box 21 extending along the front-rear direction, and the inner box 22 includes one guide rail 224 provided on the outer side of the bottom wall of the inner box 22 extending along the front-rear direction, and the guide groove 214 and the guide rail 224 are slidingly matched. The inner box 22 further includes a positioning boss 222 provided at the bottom of the rear side wall and an ear plate 223 provided on the outer side of the front end, the plate surface of the ear plate 223 being perpendicular to the up-down direction, and the ear plate 223 being provided with a through hole.

[0148] The circuit board 40 is mounted between the rear side wall of the outer box 21 and the rear side wall of the inner box 22. The circuit board 40 is arranged on the positioning boss 222 and fixedly connected to the rear side wall of the inner box 22 at both ends by screws. The output terminal 30 is mounted between the rear side of the circuit board 40 and the rear side wall of the outer box 21. And the output terminal 30 is fixedly connected to the outer box 21 and the circuit board 40 by the same set of bolts extending into the outer box 21 from the outside of the outer box 21.

[0149] The output terminal 30 includes a base plate 31 and an output pole interface 32. The output pole interface includes an output terminal 321. The base plate 31 is embedded in the output terminal mounting groove 213 formed in the inner surface of the rear side wall of the outer box 21 and is matched in shape with the output terminal mounting groove 213. The base plate 31 and the output terminal mounting groove 213 can be clearance fit or transition fit. The output pole interface 32 is matched in shape with the output terminal opening 212, and the output terminal 321 extends out of the output terminal opening 212 to the outside of the rear of the outer box 21. The output pole interface 32 and the output terminal opening 212 can be clearance fit or transition fit.

[0150] The circuit board 40 includes two electrode connecting ends 41, which are respectively a first electrode connecting end 411 and a second electrode connecting end 412 protruding forward on the left and right sides of the circuit board 40, and the first electrode connecting end 411 and the second electrode connecting end 412 are respectively electrically connected to the positive pole 111 and the negative pole 112 of each battery monomer 10 through a plurality of tabs 60. The output terminal 30 is electrically connected to the positive pole 111 and the negative pole 112 of each battery monomer 10 through the circuit board 40.

[0151] The isolation plate 50 is arranged on the top of the plurality of battery monomers 10. As shown in Figures 3 to 5 and Figure 11 , the isolation plate 50 includes a plurality of pole mounting grooves 51 corresponding to each pole 11 of the plurality of battery monomers 10, and a slot hole 511 is arranged on the bottom wall of each pole mounting groove 51. Each pole 11 is matched with the corresponding pole mounting groove 51 in shape, and the top surface of the pole 11 is matched with the bottom wall lower surface of the corresponding pole mounting groove 51. The pole 11 and the corresponding pole mounting groove 51 can be clearance fit or transition fit. The slot edge of the pole mounting groove 51 is located inside the top edge of the battery monomer 10 where the corresponding pole 11 is located. The slot hole 511 is located on the top of the corresponding pole 11. The edge of the slot hole 511 is located inside the top edge of the corresponding pole 11. The lower surface of the slot outside of the pole mounting groove 51 of the isolation plate 50 is matched with the top surface of the battery monomer 10.

[0152] As shown in Figure 3 , Figure 5 , Figures 12 to 15 , the plurality of tabs 60 are arranged on the top of the isolation plate 50. The isolation plate 50 includes a plurality of tab mounting grooves 52 corresponding to the plurality of tabs 60 one by one, and each tab 60 is mounted in the corresponding tab mounting groove 52.

[0153] Each tab 60 includes a tab body 66 and a protruding portion 61 protruding downward relative to the tab body 66. The tab body 66 is located on the upper surface of the bottom wall of the pole mounting groove 51, and the protruding portion 61 is configured to extend into the corresponding slot hole 511 and be welded with the corresponding pole 11. The protruding portion 61 is matched with the slot hole 511 in shape. The protruding portion 61 and the slot hole 511 can be clearance fit or transition fit. The bottom surface of the protruding portion 61 is matched with the top surface of the pole 11. The lower surface of the tab body 66 outside the protruding portion 61 is matched with the upper surface of the bottom wall of the pole mounting groove 51. The end of the protruding portion 61 away from the pole 11 is formed as a recessed portion 65 recessed downward. The recessed portion 65 is formed in the form of a blind hole. The protruding portion 61 of the tab 60 is configured to be fixedly connected with the corresponding pole 11 through laser welding from one side of the blind hole.

[0154] The plurality of tabs 60 includes a plurality of first tabs 601, a second tab 602, a third tab 603, and a fourth tab 604.

[0155] The first tab 601 includes two tab bodies 66 arranged side by side in the front-rear direction. A protrusion 61 is provided on each tab body 66. Each first tab 601 is configured to connect two pole pieces 11 on the same side in the left-right direction of two battery cells 10 adjacent in the front-rear direction.

[0156] The second tab 602 includes two tab bodies 66 arranged in the left-right direction and staggered in the front-rear direction, and a bent portion 62 connecting the two tab bodies 66. A protrusion 61 is provided on each tab body 66. The second tab 602 is configured to connect two pole pieces 11 on opposite sides in the left-right direction of two battery cells 10 adjacent in the front-rear direction among the plurality of battery cells 10.

[0157] The third tab 603 includes a tab body 66 and a first output pole 63 connected to the tab body 66. A protrusion 61 is provided on the tab body 66. The third tab 603 is configured to connect a pole piece 11 (positive pole piece 111) on the left side of a battery cell 10 near the rear side of the inner case 22 and a first electrode connecting end 411 of the circuit board 40.

[0158] The fourth tab 604 includes a protrusion 61 and a second output pole 64. The fourth tab 604 is configured to connect a pole piece 11 (negative pole piece 112) on the right side of a battery cell 10 near the rear side of the inner case 22 and a second electrode connecting end 412 of the circuit board 40.

[0159] Two insulating plates 70 and two buffer pads 80 are provided correspondingly and respectively on the front and rear sides of the plurality of battery cells 10. The insulating plate 70 has a U-shaped horizontal cross-section, including a main plate body 71 and two wing plates 72 respectively connected to the left and right ends of the main plate body 71. The main plate body 71 is located between the battery cell 10 and the inner case 22. The buffer pad 80 is provided between the battery cell 10 and the main plate body 71. The two wing plates 72 are respectively provided between the battery cell 10 and the inner case 22.

[0160] The outer case 21 forms a first mounting stopper at the inner case mounting port 211, and the front end of the inner case 22 forms a second mounting stopper matched with the first mounting stopper. The inner case 22 is assembled with the plurality of battery cells 10, the plurality of tabs 60, the circuit board 40, etc., and the output terminal 30 is matched with the outer case 21. Then, the inner case 22 is pushed into the outer case 21 from the inner case mounting port 211 of the outer case 21 until the first mounting stopper and the second mounting stopper are matched. A set of bolts is used to connect the outer case 21, the output terminal 30, and the circuit board 40 from the outside of the rear side wall of the outer case 21. Finally, the connection between the outer case 21 and the inner case 22 on the front side is sealed and connected together by welding.

[0161] It should be noted that the above-mentioned embodiments are only used to illustrate but not to limit the technical solutions of the present application. Although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or equivalent replacements can be made to some technical features, and all of these should be covered in the technical solutions of the present application.

Claims

1. A battery pack (B) characterized by, The battery pack (B) comprises: a plurality of battery cells (10), each of which comprises a pole (11); a plurality of busbars (60), each of which is connected to the pole (11) to electrically connect the plurality of battery cells (10); and a separation plate (50) disposed on top of the plurality of battery cells (10) and comprising a plurality of pole mounting slots (51) with downward openings corresponding to the poles (11) of the plurality of battery cells (10), each of the pole mounting slots (51) being provided with a slot hole (511) on the bottom wall thereof, each of the poles (11) being located in the corresponding pole mounting slot (51), the opening edge of the pole mounting slot (51) being located inside the top surface edge of the battery cell (10) in which the corresponding pole (11) is located, the slot hole (511) being located on top of the corresponding pole (11), the edge of the slot hole (511) being located inside the top surface edge of the corresponding pole (11), and the plurality of busbars (60) being disposed on top of the separation plate (50), each of the busbars (60) being welded to the pole (11) connected thereto through the slot hole (511); wherein the pole (11) is matched in shape with the corresponding pole mounting slot (51); and / or the top surface of the pole (11) is flush with the lower surface of the bottom wall of the corresponding pole mounting slot (51); and / or the lower surface of the opening side of the pole mounting slot (51) of the separation plate (50) is flush with the top surface of the battery cell (10).

2. The battery pack (B) according to claim 1, characterized in that The separation plate (50) comprises a plurality of busbar mounting slots (52) corresponding one-to-one to the plurality of busbars (60), and each of the busbars (60) is mounted in the corresponding busbar mounting slot (52).

3. The battery pack (B) according to any one of claims 1 or 2, characterized in that, The busbar (60) comprises a bar body (66) and a protruding portion (61) protruding downward relative to the bar body (66), the bar body (66) being located on the upper surface of the bottom wall of the pole mounting slot (51), and the protruding portion (61) being configured to extend into the slot hole (511) and be welded to the pole (11).

4. The battery pack (B) according to claim 3, wherein the protruding portion (61) is matched in shape with the slot hole (511); and / or the bottom surface of the protruding portion (61) is flush with the top surface of the pole (11); and / or the lower surface of the bar body (66) on the outside of the protruding portion (61) is flush with the upper surface of the bottom wall of the pole mounting slot (51).

5. The battery pack (B) according to claim 3, characterized in that The upper side of the protruding portion (61) forms a concave portion (65) concave downward.

6. The battery pack (B) according to claim 3, characterized in that The plurality of busbars (60) comprises: a first busbar (601) comprising two bar bodies (66) arranged side by side in the front-rear direction, one protruding portion (61) being arranged on each of the bar bodies (66), and the first busbar (601) being configured to connect two poles (11) located on the same side in the left-right direction of two battery cells (10) adjacent in the front-rear direction; and / or a second busbar (602) comprising two of the sheet bodies (66) arranged along the left-right direction and staggered along the front-rear direction and a bent portion (62) connecting the two sheet bodies (66), one of the protrusions (61) is arranged on each of the sheet bodies (66), the second busbar (602) is configured to connect two of the poles (11) of two of the battery monomers (10) adjacent along the front-rear direction and respectively located on two sides along the left-right direction; and / or a third busbar (603) comprising one of the sheet bodies (66) and a first output pole (63) connected with the sheet body (66), one of the protrusions (61) is arranged on the sheet body (66), the third busbar (603) is configured to connect one of the poles (11) of the battery monomer (10) adjacent to the circuit board (40) and a first of the electrode connecting ends (411) of the two electrode connecting ends (41) of the circuit board (40); and / or a fourth busbar (604) comprising one of the sheet bodies (66) and a second output pole (64) connected with the sheet body (66), one of the protrusions (61) is arranged on the sheet body (66), the fourth busbar (604) is configured to connect one of the poles (11) of the battery monomer (10) away from the circuit board (40) and a second of the electrode connecting ends (412) of the two electrode connecting ends (41) of the circuit board (40).

7. The battery pack (B) according to any one of claims 1 or 2, characterized in that, Further comprising: a box body (20) comprising a square outer box body (21) and a square inner box body (22), a front side of the outer box body (21) is open to form an inner box body mounting port (211), a rear side wall of the outer box body (21) is provided with an output end opening (212), the inner box body (22) is pullably mounted in the outer box body (21) from the inner box body mounting port (211) along the front-rear direction, an upper side of the inner box body (22) is open to form a battery mounting port (221), a plurality of the battery monomers (10) are mounted in the inner box body (22) through the battery mounting port (221); a circuit board (40) electrically connected with the poles (11) and mounted between a rear side wall of the outer box body (21) and a rear side wall of the inner box body (22); and an output terminal (30) mounted between a rear side of the circuit board (40) and the rear side wall of the outer box body (21) and comprising an output pole interface (32), the output pole interface (32) is electrically connected with the poles (11) through the circuit board (40), and an output end (321) of the output pole interface (32) is exposed outside a side of the box body (20) through the output end opening (212) on the box body (20).

8. The battery pack (B) according to claim 7, characterized in that, the top wall, the bottom wall, the left side wall and the right side wall of the outer box body (21) are closed; and / or the bottom wall, the front side wall, the rear side wall, the left side wall and the right side wall of the inner box body (22) are closed.

9. The battery pack (B) according to claim 7, characterized in that, the circuit board (40) is fixedly connected to the rear side wall of the inner box body (22); and / or The rear side wall of the inner box body (22) is provided with a circuit board limiting structure configured to limit the relative position of the circuit board (40) and the inner box body (22) in at least one direction; and / or The output terminal (30) is fixedly connected to the circuit board (40); and / or The output terminal (30) is fixedly connected to the outer box body (21); and / or The outer box body (21) comprises an output terminal mounting groove (213) provided on the inner side of the rear side wall of the outer box body (21) and communicating with the output terminal opening (212), and the output terminal (30) is embedded in the output terminal mounting groove (213); and / or The output end (321) extends out of the output terminal opening (212) to the outside of the rear of the outer box body (21); and / or The front end of the inner box body (22) further comprises an ear plate (223).

10. The battery pack (B) according to claim 9, characterized in that, The top end of the circuit board (40) is provided with two electrode connecting ends (41) extending forward on the left and right sides, respectively, and the two electrode connecting ends (41) are electrically connected to the positive electrode pole (111) and the negative electrode pole (112) in the pole (11) through the gasket (60); and / or The circuit board limiting structure comprises a positioning boss (222) provided on the bottom of the rear side wall of the inner box body (22), and the circuit board (40) is arranged on the positioning boss (222); and / or The output terminal (30) is fixedly connected to the outer box body (21) and the circuit board (40) by the same set of bolts extending into the outer box body (21) from the outside of the outer box body (21); and / or The output terminal (30) further comprises a base plate (31), and the output pole interface (32) is connected to the rear side of the base plate (31), the base plate (31) is embedded in the output terminal mounting groove (213) and cooperates with the shape of the output terminal mounting groove (213); and / or The output pole interface (32) cooperates with the shape of the output terminal opening (212); and / or The ear plate (223) is provided with a through hole, and / or the plate surface of the ear plate (223) is perpendicular to the up-down direction.

11. The battery pack (B) according to claim 7, characterized in that, The inner side of the outer box body (21) is provided with a first guide structure, and the outer side of the inner box body (22) is provided with a second guide structure, and the second guide structure cooperates with the first guide structure to limit the movement of the inner box body (22) relative to the outer box body (21) in the front-rear direction.

12. The battery pack (B) according to claim 7, characterized in that, The outer box body (21) forms a first mounting stop at the inner box body mounting opening (211), and the front end of the inner box body (22) forms a second mounting stop cooperating with the first mounting stop; and / or The connection between the outer box body (21) and the inner box body (22) is sealingly connected by welding.

13. An electrically powered device (D), characterized in that The battery pack (B) according to any one of claims 1 to 12 is used to provide power for the electrical device (D).

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