Collection line circuit board, battery and electric equipment

Abstract

The utility model provides an acquisition line circuit board, a battery and electric equipment. The battery comprises a plurality of battery cells which are electrically connected; the acquisition line circuit board comprises a body, the body is provided with a plurality of acquisition points used for acquiring working parameters of the plurality of battery monomers, the acquisition points are electrically connected with the battery monomers, and the plurality of acquisition points are arranged at intervals; the body is at least provided with two opening grooves, and the opening directions of the opening grooves form an included angle. By applying the technical scheme of the invention, the problem of how to improve the working reliability of the acquisition line circuit board in the battery can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a collecting wire circuit board, a battery, and an electrical device. Background Art

[0002] In power batteries, a collecting wire circuit board is provided to collect relevant operating parameters of battery cells in a battery pack to monitor the operating status of the battery cells. After the battery cells undergo charge and discharge cycles, the battery cells expand. The expansion of the battery cells will cause relative displacement with the collecting wire circuit board, thereby causing a pulling situation on the collecting wire circuit board, reducing the reliability of the operation of the collecting wire circuit board. Summary of the Utility Model

[0003] The present application provides a collecting wire circuit board, a battery, and an electrical device to solve the problem of how to improve the working reliability of the collecting wire circuit board in the battery.

[0004] The present application further provides a battery, including: a plurality of battery cells electrically connected; a collecting wire circuit board, the collecting wire circuit board including a body, the body being provided with a plurality of collecting points for collecting the operating parameters of the plurality of battery cells, the collecting points being electrically connected to the battery cells, and the plurality of collecting points being arranged at intervals; and at least two opening grooves with an included angle in the opening directions are formed on the body.

[0005] On the one hand, by providing opening grooves on the body of the collecting wire circuit board in the present application, a weak area that is easy to deform can be formed on the body, and the conduction of the acting force can be blocked or reduced at the opening position, so that during the deformation process of the battery cells, the deformation ability of the body at the opening groove position is greater than that of other positions, and deformation can occur when the acting force of the deformation of the battery cells is transmitted to the body, thereby adapting to the relative change in the position of the collecting points caused by the expansion of the battery, and further being beneficial to reducing the pulling force on the collecting points, so as to improve the stability of the connection between the collecting wire circuit board and the battery cells, and then being beneficial to improving the stability and reliability of the battery operation.

[0006] On the other hand, by providing at least two opening grooves with an included angle in the opening directions in the present application, the acting force can be reduced from at least two directions, and the deformation ability of the body in at least two directions can be ensured, which can further improve the stability of the collecting wire circuit board, so as to further improve the stability and reliability of the battery.

[0007] In some embodiments, the open slot includes a first open slot and a second open slot with their opening directions forming an angle; the body includes two first extension parts spaced apart in a first direction and a connecting part connecting the two first extension parts. Each first extension part extends along a second direction, and a plurality of the acquisition points are spacedly arranged on each first extension part; the first open slot is jointly formed between the two first extension parts and the connecting part, and the second open slot is formed in at least one of the first extension parts, and the first direction and the second direction are arranged at an angle.

[0008] In the embodiments of the present application, by setting the open slot as the first open slot and the second open slot, and the first open slot is jointly formed by two first extension parts and a connecting part, it is beneficial to adapt to the spaced arrangement of the positive and negative electrode posts in the same battery cell; by providing at least one second open slot on the first extension part, it is beneficial to form a weak area on the first extension part to adapt to the position change of the electrode post relative to the acquisition point during the expansion and contraction of the battery cell; reduce the pulling force at the acquisition point, so as to improve the stability of the connection between the acquisition line circuit board and the battery cell, thereby being beneficial to improving the stability and reliability of the battery operation.

[0009] In some embodiments, the opening of the first open slot faces the second direction, and the opening of the second open slot faces the first direction.

[0010] In the embodiments of the present application, by setting the opening of the first open slot to face the second direction and the opening direction of the second open slot to face the first direction, wherein, when the first direction is perpendicular to the second direction, the direction of the second open slot is perpendicular to the direction of the expansion deformation of the battery cell, and the notch of the second open slot is more conducive to deforming in the second direction to better adapt to the deformation of the battery cell, which is beneficial to improving the stability of the connection between the acquisition line circuit board and the battery cell.

[0011] In some embodiments, each first extension part is provided with at least one second open slot.

[0012] In the embodiments of the present application, by corresponding the setting of the second open slot to the number of the first extension parts, it is beneficial to improve the adaptability of each first extension part to the deformation of the battery cell and reduce the risk of breakage at the connection between the battery cell and the acquisition line circuit board.

[0013] In some embodiments, the open slot further includes a third open slot, the third open slot is formed in at least one of the two first extension parts, and the opening direction of the third open slot forms an angle with the opening direction of at least one of the first open slot and the second open slot.

[0014] In the embodiments of the present application, by providing a third opening groove on the first extension portion, it is beneficial to improve the deformation ability of the first extension portion, and the opening direction of the third opening groove is arranged at an angle with the opening direction of at least one of the first opening groove and the second opening groove, which is beneficial to enhancing the deformation ability of the body in the battery cell arrangement direction, so as to improve the adaptability of the body and reduce the risk of breakage at the connection between the battery cell and the body.

[0015] In some embodiments, the opening of the first opening groove faces the second direction, and the opening of the second opening groove faces the first direction; the opening of the third opening groove faces the third direction; wherein, the third direction is the opposite direction of the first direction.

[0016] In the embodiments of the present application, by providing two opening grooves with opposite directions on the first extension portion, it is beneficial to improve the uniformity of deformation of the body in the second direction, thereby improving the uniform stress of the body in the second direction, reducing the risk of local breakage of the body, or reducing the risk of breakage at the connection between the body and the battery cell at a local position.

[0017] In some embodiments, each of the first extension portions is provided with at least one of the second opening grooves and at least one of the third opening grooves.

[0018] In the embodiments of the present application, by providing two opening grooves with opposite directions on each first extension portion, it is beneficial to further improve the uniformity of deformation of the body in the second direction, thereby improving the uniform stress of the body in the second direction, reducing the risk of local breakage of the body, or reducing the risk of breakage at the connection between the body and the battery cell at a local position.

[0019] In some embodiments, each of the first extension portions is provided with a plurality of second opening grooves arranged at intervals and a plurality of third opening grooves arranged at intervals; and the opening of the second opening groove faces the first direction; the opening of the third opening groove faces the third direction; the third direction is the opposite direction of the first direction, so that at least a part of each first extension portion has a meandering curved structure.

[0020] In the embodiments of the present application, by setting the body as a curved structure, even when the total length of the abnormal acquisition line circuit board, it can still meet the adaptability performance of the deformation of the body and the battery cell, which is beneficial to reducing the material cost of the acquisition line circuit board and improving the material utilization rate.

[0021] In some embodiments, along the first direction, the second opening groove and the third opening groove are arranged in a staggered manner; and / or, along the second direction, the second opening groove and the third opening groove are arranged in a staggered manner.

[0022] In the present application, by staggering the positions of the second opening groove and the third opening groove in the second direction or the third direction, on the basis of improving the deformation ability of the body, it is also beneficial to reduce the range of the weak area of the body jointly affected by the second opening groove and the third opening groove, so as to enhance the structural strength of the entire acquisition line circuit board and reduce the risk of breakage of the acquisition line circuit board.

[0023] In some embodiments, the opening groove includes a fourth opening groove and a fifth opening groove with an included angle in the opening direction; the body includes a second extension portion extending in the second direction, and a plurality of the acquisition points are spaced apart on both sides of the second extension portion in the width direction, and the fourth opening groove and the fifth opening groove are respectively opened on both sides of the body along the width direction and / or the thickness direction.

[0024] In the embodiments of the present application, by arranging the fourth opening groove and the fifth opening groove, it is beneficial to improve the deformation ability of the body and reduce the risk of breakage of the acquisition line circuit board.

[0025] In some embodiments, the opening directions of the fourth opening groove and the fifth opening groove are opposite to each other, so that at least part of the body is in a meandering shape.

[0026] In the embodiments of the present application, by setting the opening directions of the fourth opening groove and the fifth opening groove in different directions, it is beneficial to further improve the uniformity of deformation of the body in the second direction, thereby improving the uniform stress of the body in the second direction, reducing the risk of local breakage of the body, or reducing the risk of breakage at the connection between the body and the battery cell at a local position.

[0027] In some embodiments, along the width direction of the body, the fourth opening groove and the fifth opening groove are staggeredly arranged; and / or, along the length direction of the body, the fourth opening groove and the fifth opening groove are staggeredly arranged; and / or, along the thickness direction of the body, the fourth opening groove and the fifth opening groove are staggeredly arranged.

[0028] In the embodiments of the present application, by staggering the positions of the fourth opening groove and the fifth opening groove in the length direction or the width direction of the body, on the basis of improving the deformation ability of the body, it is also beneficial to reduce the range of the weak area of the body jointly affected by the fourth opening groove and the fifth opening groove, so as to enhance the structural strength of the entire acquisition line circuit board and reduce the risk of breakage of the acquisition line circuit board.

[0029] In some embodiments, the opening groove is U-shaped or V-shaped; and / or, the depths of the opening grooves are the same or different.

[0030] In the embodiments of the present application, by setting the opening groove in a U-shaped structure, it is beneficial to reduce the risk of stress concentration at the opening groove, so as to reduce the risk of breakage of the body.

[0031] In some embodiments, all of the opening grooves are located in the same plane; and / or, the body has a flat sheet-like structure; and / or, the length direction of the body is the stacking direction of the plurality of battery cells.

[0032] The embodiments of the present application are beneficial to meeting the adaptability of the body and the battery cell deformation without increasing the total length of the acquisition line circuit board, beneficial to reducing the material cost of the acquisition line circuit board, and improving the material utilization rate.

[0033] In some embodiments, the plurality of opening grooves are arranged at intervals along the length direction of the body; and along the length direction of the body, at least one acquisition point is provided between any two adjacent opening grooves of the body. By staggeredly arranging the opening grooves and the acquisition points and spacing the opening grooves and the acquisition points in the embodiments of the present application, the deformation ability of the body can be improved, and the interference of the opening grooves on the work of the acquisition points can be reduced.

[0034] In some embodiments, a connector is further included, and the connector is connected to one end of the body; the opening groove is formed at one end of the body away from the connector.

[0035] By arranging the opening groove at one end of the body away from the connector in the embodiments of the present application, it is beneficial to meet the structural strength of the body near the connector position and to adapt to the deformation at the position where the cumulative deformation of the battery cell is large.

[0036] In some embodiments, the maximum distance from the first opening groove away from the connector to the last opening groove closest to the connector is a first distance, and the length of the body is a second distance, and the first distance is greater than or equal to one-half of the second distance.

[0037] By limiting the ratio of the length of the opening groove layout to the total length of the body in the present application, it is beneficial to improve the structural strength of the acquisition line circuit board on the basis of improving the expansion ability of the acquisition line circuit board to adapt to the battery cell, and reduce the risk of the acquisition line circuit board breaking.

[0038] In some embodiments, a connector is further included, and the connector is connected to one end of the body; a fixing through hole is formed at one end of the body away from the connector.

[0039] By arranging the fixing through hole at a position away from the connector in the embodiments of the present application, the body has a fixed relationship with the connector at one end of the connector, and the fixing through hole is beneficial to improving the stability of the body at the position away from the connector end.

[0040] In some embodiments, the battery further includes: an explosion-proof valve, arranged on one side of the battery cell close to the body; an avoidance through hole is formed in the body for avoiding the explosion-proof valve.

[0041] In the embodiments of the present application, by providing an avoidance through-hole at a position corresponding to the explosion-proof valve on the body, it is beneficial to reduce the interference of the body on the pressure relief process of the explosion-proof valve, improve the efficiency of the pressure relief of the explosion-proof valve, and also beneficial to reduce the risk of damage to the body caused by excessive temperature during the pressure relief process of the explosion-proof valve.

[0042] In some embodiments, a plurality of the battery cells are electrically connected through a plurality of bus bars, and each of the acquisition points is electrically connected to the corresponding bus bar through an acquisition nickel sheet.

[0043] In the embodiments of the present application, the acquisition point and the bus bar are connected through an acquisition nickel sheet, which is beneficial to improve the stability and reliability of the connection. In some embodiments, the number of the battery cells is plural, the number of the avoidance through-holes is one or more, and when the number of the avoidance through-holes is plural, each of the avoidance through-holes corresponds to at least one explosion-proof valve of the battery cells.

[0044] In the embodiments of the present application, by correspondingly setting the number of the avoidance through-holes and the number of the explosion-proof valves, it is beneficial to reduce the interference of the body on the pressure relief of the explosion-proof valve and improve the efficiency of the pressure relief of the explosion-proof valve.

[0045] In some embodiments, it further includes a temperature collector disposed on the body to collect the temperature of the battery cells.

[0046] In the embodiments of the present application, by providing a temperature collector, it is beneficial to obtain the temperature of the battery cells in real time to improve the performance of the battery cells during operation.

[0047] In some embodiments, the temperature collector is set to at least two, and at least two of the temperature collectors are arranged at intervals on the body.

[0048] In the embodiments of the present application, by providing a plurality of temperature collectors, it is beneficial to improve the accuracy of the temperature sampling of the battery cells.

[0049] The embodiments of the present application further provide a collection line circuit board, including: a body provided with a plurality of acquisition points for acquiring the operating parameters of the battery cells, and the plurality of acquisition points are arranged at intervals; and at least two opening grooves with an included angle in the opening directions are formed on the body.

[0050] In the embodiments of the present application, by providing an opening groove on the body of the acquisition line circuit board, a weak area that is easy to deform can be formed on the body, and the conduction of the acting force can be blocked or reduced at the opening position, so that during the deformation of the battery cell, the deformation ability of the body at the opening groove position is greater than that at other positions. When the acting force of the deformation is transmitted from the battery cell to the body, deformation occurs, thereby realizing the relative change of the position of the acquisition point, which is beneficial to reducing the pulling force at the acquisition point, improving the stability of the connection between the acquisition line circuit board and the battery cell, and then being beneficial to enhancing the working stability and reliability of the electrical equipment.

[0051] In some embodiments, the opening groove includes a first opening groove and a second opening groove with an included angle in the opening direction; the body includes two first extension parts spaced in a first direction and a connecting part connecting the two first extension parts. Each first extension part extends along a second direction, and a plurality of the acquisition points are spacedly arranged on each first extension part; the first opening groove is jointly formed between the two first extension parts and the connecting part, and the second opening groove is provided on at least one of the two first extension parts, and the first direction and the second direction are arranged at an included angle.

[0052] In the embodiments of the present application, by setting the opening groove as the first opening groove and the second opening groove, and the first opening groove is jointly formed by the two first extension parts and the connecting part, it is beneficial to adapt to the spaced arrangement of the positive and negative electrode posts in the same battery cell; by providing at least one second opening groove on the first extension part, it is beneficial to form a weak area on the first extension part to adapt to the position change of the electrode post relative to the acquisition point during the expansion and contraction of the battery cell; reducing the pulling force at the acquisition point to improve the stability of the connection between the acquisition line circuit board and the battery cell, thereby being beneficial to enhancing the working stability and reliability of the battery.

[0053] In some embodiments, the opening groove further includes a third opening groove, the third opening groove is provided on at least one of the two first extension parts, and the opening direction of the third opening groove forms an included angle with the opening direction of at least one of the first opening groove and the second opening groove.

[0054] In the embodiments of the present application, by providing the third opening groove on the first extension part, it is beneficial to improve the deformation ability of the first extension part, and the opening direction of the third opening groove forms an included angle with the opening direction of at least one of the first opening groove and the second opening groove, which is beneficial to enhancing the deformation ability of the body in the arrangement direction of the battery cells, improving the adaptability of the body, and reducing the risk of fracture at the connection between the battery cell and the body.

[0055] In some embodiments, the opening groove includes a fourth opening groove and a fifth opening groove with their opening directions forming an included angle; the body includes a second extension portion extending in the second direction, and a plurality of the collection points are arranged at intervals on both sides of the second extension portion in the width direction, and the fourth opening groove and the fifth opening groove are respectively formed on both sides of the body along the width direction and / or the thickness direction.

[0056] By arranging the fourth opening groove and the fifth opening groove in the embodiments of the present application, it is beneficial to improve the deformation ability of the body and reduce the risk of the collection line circuit board breaking.

[0057] In some embodiments, the opening groove is U-shaped or V-shaped; and / or, the depths of the opening grooves are the same or different.

[0058] By setting the opening groove in a U-shaped structure in the embodiments of the present application, it is beneficial to reduce the risk of stress concentration at the opening groove, so as to reduce the risk of the body breaking.

[0059] The embodiments of the present application also provide an electrical device, including the battery or the collection line circuit board as described above.

[0060] By providing an opening groove on the body of the collection line circuit board in the electrical device in the embodiments of the present application, a weak area that is easy to deform can be formed on the body, and the conduction of the acting force can be blocked or reduced at the opening position, so that during the deformation of the battery cell, the deformation ability of the body at the opening groove position is greater than that at other positions. When the acting force of the deformation of the battery cell is transmitted to the body, deformation occurs, so as to realize the relative change of the position of the collection point, which is beneficial to reducing the pulling force on the collection point, improving the connection stability between the collection line circuit board and the battery cell, and then being beneficial to improving the working stability and reliability of the electrical device.

[0061] On the other hand, by providing at least two opening grooves with their opening directions forming an included angle, the acting force can be reduced from at least two directions, and the deformation ability of the body in at least two directions can be ensured, which can further improve the stability of the collection line circuit board, so as to further improve the stability and reliability of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0063] Figure 1 It is a schematic structural diagram of an electrical device disclosed in the first embodiment of the present application;

[0064] Figure 2 It is a schematic structural diagram of the acquisition line circuit board disclosed in the first embodiment of the present application;

[0065] Figure 3 It is a schematic structural diagram of the battery disclosed in the first embodiment of the present application;

[0066] Figure 4 is Figure 2 The enlarged view of part A in

[0067] Figure 5 is Figure 3 The enlarged view of part B in

[0068] Figure 6 It is a schematic structural diagram of the acquisition line circuit board disclosed in the second embodiment of the present application;

[0069] Figure 7 It is a schematic structural diagram of the acquisition line circuit board disclosed in the third embodiment of the present application.

[0070] In the drawings, the drawings are not drawn to actual scale.

[0071] Marking description:

[0072] 1. Body; 11. Acquisition point; 12. Opening groove; 121. First opening groove; 122. Second opening groove; 123. Third opening groove; 124. Fourth opening groove; 125. Fifth opening groove; 126. Sixth opening groove; 127. Seventh opening groove; 13. First extension part; 14. Connection part; 15. Second extension part; 2. Battery cell; 3. Connector; 4. Fixed through hole; 5. Avoidance through hole; 6. Explosion-proof valve; 7. Temperature collector; 8. Metal part; 9. Barium piece; 200. Battery; 300. Controller; 400. Motor; 1000. Vehicle. Detailed implementation manners

[0073] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0074] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0075] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity, specific order, or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality" is more than two, unless otherwise specifically defined.

[0076] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0077] In the description of the embodiments of the present application, the term "and / or" is merely an associative relationship describing associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally represents an "or" relationship between the associated objects before and after.

[0078] In the description of the embodiments of the present application, the term "a plurality" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0079] In the description of the embodiments of the present application, technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the embodiments of the present application.

[0080] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0081] At present, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power stations, but also widely used in electric transportation such as electric bicycles, electric motorcycles, and electric vehicles, as well as in multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of power batteries, the market demand is also continuously increasing.

[0082] In this application, the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, etc., and the embodiments of this application do not limit this. The battery cell can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, and the embodiments of this application do not limit this either. Generally, the battery cells are divided into three types according to the encapsulation method: cylindrical battery cells, square battery cells, and soft-pack battery cells, and the embodiments of this application do not limit this either.

[0083] The battery mentioned in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide a higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack, etc. Generally, the battery includes a box body for encapsulating one or more battery cells. The box body can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells.

[0084] The battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode plate, a negative electrode plate, and a separator. The battery cell mainly works by the movement of metal ions between the positive electrode plate and the negative electrode plate. The positive electrode plate includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The current collector without the coated positive electrode active material layer protrudes from the current collector with the coated positive electrode active material layer. The current collector without the coated positive electrode active material layer serves as the positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, etc. The negative electrode plate includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The current collector without the coated negative electrode active material layer protrudes from the current collector with the coated negative electrode active material layer. The current collector without the coated negative electrode active material layer serves as the negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that a large current can pass through without fusing, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc.

[0085] The battery cell further includes a housing and an end cap. The housing can protect the electrode assembly from the outside to prevent external foreign objects from affecting the charging or discharging of the electrode assembly. The end cap and the housing together define a receiving space for accommodating the electrode assembly, the electrolyte, and other components.

[0086] In the prior art, during the charging and discharging process of the battery cell, the electrode assembly of the battery cell will continuously expand and contract. The acquisition line circuit board in the battery is used to connect the battery cell to acquire the operating parameters of the battery cell. The above operating parameters include but are not limited to the voltage, current, temperature, etc. of the battery cell. During the expansion and contraction of the battery cell, a relative displacement will occur at the position where the battery cell is connected to the acquisition line circuit board, thereby affecting the connection stability between the battery cell and the acquisition line circuit board. Through the deformation of the battery cell in the stacking direction, it is easy to cause the situation of breakage at the connection position between the battery cell and the acquisition line circuit board, thereby affecting the working performance of the battery cell.

[0087] In order to improve the stability of the battery operation, the present application provides a battery, which includes a plurality of battery cells and an acquisition line circuit board. The acquisition line circuit board includes a body, and the body is provided with a plurality of acquisition points for acquiring the operating parameters of the battery cells. The acquisition points are electrically connected to the battery cells, and the plurality of acquisition points are arranged at intervals. At least two opening grooves with an included angle in the opening direction are provided on the body. In the embodiment of the present application, by providing the opening grooves on the body of the acquisition line circuit board, a weak area that is easy to deform can be formed on the body, and the conduction of the acting force can be blocked or reduced at the opening position, so that during the deformation of the battery cell, the deformation ability of the body at the opening groove position is greater than that of other positions. When the acting force of the deformation of the battery cell is transmitted to the body, deformation occurs, so as to realize the relative change of the position of the acquisition point, which is beneficial to reducing the pulling force on the acquisition point, thereby improving the connection firmness between the acquisition line circuit board and the battery cell, and then being beneficial to improving the stability and reliability of the operation of the electrical equipment. By providing at least two opening grooves with an included angle in the opening direction, the acting force can be reduced from at least two directions, and the deformation ability of the body in at least two directions can be ensured, which can further improve the firmness of the acquisition line circuit board, so as to further improve the stability and reliability of the battery.

[0088] The battery disclosed in the embodiment of the present application can be but is not limited to being used in electrical equipment such as vehicles, ships, or aircraft. The power system of the electrical equipment can be composed of the battery disclosed in the present application.

[0089] The embodiments of the present application provide an electrical device using a battery as a power source. The electrical device can be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, an electric toy, an electric tool, a battery car, an electric vehicle, a ship, a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric aircraft toy, etc., and the spacecraft can include an airplane, a rocket, a space shuttle, a spaceship, etc.

[0090] For the convenience of description, the following embodiments will take a vehicle 1000, which is an electrical device in an embodiment of the present application, as an example for illustration.

[0091] Please refer to Figure 1 , Figure 1 , which is a schematic structural diagram of the vehicle 1000 provided by some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 200 is disposed inside the vehicle 1000, and the battery 200 can be disposed at the bottom, the head or the tail of the vehicle 1000. The battery 200 can be used to supply power to the vehicle 1000. For example, the battery 200 can be used as the operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 300 and a motor 400. The controller 300 is used to control the battery 200 to supply power to the motor 400, for example, for the working power requirements during the start, navigation and driving of the vehicle 1000.

[0092] In some embodiments of the present application, the battery 200 can not only be used as the operating power source of the vehicle 1000, but also as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0093] In some embodiments, the battery 200 can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0094] In some embodiments, the battery 200 includes a box body and battery cells, and the battery cells are accommodated in the box body. Among them, the box body is used to provide an accommodation space for the battery cells, and the box body can adopt various structures.

[0095] In the battery 200, there can be multiple battery cells. The multiple battery cells can be connected in series, in parallel, or in a hybrid connection. A hybrid connection means that among the multiple battery cells, there are both series and parallel connections. The multiple battery cells can be directly connected in series, in parallel, or in a hybrid connection together, and then the whole formed by the multiple battery cells is accommodated in a box. Of course, the battery can also be that multiple battery cells are first connected in series, in parallel, or in a hybrid connection to form a battery module, and then multiple battery modules are connected in series, in parallel, or in a hybrid connection to form a whole and are accommodated in a box. The battery can also include other structures. For example, the battery can also include a busbar component for realizing the electrical connection between multiple battery cells.

[0096] Among them, each battery cell can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but it is not limited thereto. The battery cell can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc.

[0097] An embodiment of the present application provides a battery, as Figure 2 and Figure 3 shown. The battery includes multiple battery cells 2 and a collection line circuit board. The collection line circuit board is used to be electrically connected to the battery cells to collect the operating parameters of the battery cells 2. Among them, the operating parameters include but are not limited to parameter data such as the voltage, current, and temperature of the battery cells 2. In the embodiment of the present application, the operating parameters of the battery cells 2 are collected through the collection line circuit board, so as to be able to timely obtain the operating state of the battery cells, and further better adjust the operation of the battery cells to improve the working efficiency of the battery cells.

[0098] It should be noted that the collection line circuit board in the embodiment of the present application includes but is not limited to a flexible printed circuit board (FPC, Flexible Printed Circuit), and can also adopt circuit boards of types such as flexible flat cables (FFC, Flexible Flat Cable) and flexible die-cut circuit boards (FDC, Flexible Display Circuit). The embodiment of the present application takes the collection line circuit board as a flexible printed circuit board as an example for description.

[0099] As Figure 2 and Figure 3 shown, the collection line circuit board includes a body 1. Among them, on the body 1, the circuit shape and connection method for collecting the operating parameters of the battery cells can be made through processes such as printing and etching. The body 1 is provided with multiple collection points 11 for collecting the operating parameters of the battery cells 2. That is to say, on the body 1, at least exposed collection points 11 are formed at the ends of the circuit. The collection points 11 are used to be electrically connected to the battery cells 2 to obtain the operating parameters of the battery cells 2.

[0100] It should be noted that the embodiment of the present application does not limit the electrical connection form between the battery cells 2 and the collection points 11. For example, referring toFigure 5 As shown, the battery cell 2 and the acquisition point 11 can be fixed and conduct electricity by welding with a metal part 8. The above-mentioned metal part 8 includes but is not limited to aluminum wire, copper wire, etc. Of course, in other embodiments, the electrical connection method is not limited to welding with a metal part, and other forms such as crimping and plugging can also be used to achieve electrical connection. The connection method between the battery cell 2 and the acquisition point 11 in the embodiments of the present application will not limit the function of the battery.

[0101] As Figure 3 described, in the embodiments of the present application, the battery cell 2 can be set to one or multiple. When multiple battery cells 2 are provided, the multiple battery cells 2 are stacked along a set direction. The embodiments of the present application do not limit the stacking direction of the battery cell 2. For example, the stacking direction of the multiple battery cells 2 can be the thickness direction of the battery cell 2, or the height direction or length direction of the battery cell. Figure 3 The embodiments shown are described by taking the stacking of battery cells 2 in the thickness direction as an example. Figure 3 As shown, the direction indicated by the N2 direction is the thickness direction of the battery cell 2. The multiple battery cells 2 are stacked in the thickness direction to increase the energy density of the battery. The acquisition line circuit board can be arranged on the same side of the multiple battery cells 2 in the height direction, or on the same side of the multiple battery cells 2 in the length direction, or on the same side in other directions. The position where the acquisition line circuit board is arranged is related to the position where the pole columns are arranged in the battery cell 2. The embodiments of the present application are described by taking the pole columns of the battery cell being arranged at the top of the battery cell 2 as an example, but the present application does not limit the embodiments where the pole columns are arranged at other positions of the battery cell.

[0102] As Figure 3 shown, the multiple acquisition points 11 are arranged at intervals; among them, the interval means that the distance between the acquisition points 11 is greater than a set value. The distance between adjacent acquisition points 11 can be set according to the distance between the pole columns of adjacent battery cells 2. In some embodiments, setting the distance between adjacent acquisition points 11 to the distance between the upper pole columns of adjacent battery cells 2 is beneficial to improving the stability of the connection between the pole columns on the battery cell and the acquisition point, making the distances between the pole columns of each battery cell 2 and the acquisition point equal, and reducing the risk of local pulling.

[0103] As Figure 2As shown in the figure, at least two opening grooves 12 with an included angle in their opening directions are formed on the body 1. Herein, the opening groove 12 refers to a groove formed at the edge of the body 1; at least two opening grooves 12 means that the number of opening grooves 12 provided on the body 1 includes two or more. It should be noted that the embodiments of the present application do not limit the forming method of the opening groove 12. For example, the opening groove 12 can be formed by cutting the body 1 with a regular shape, and the opening groove 12 can also be formed by bending the body 1 with a regular edge. No matter which forming method is adopted, as long as an embodiment can form the opening groove 12 on the body 1 is within the protection scope of the present application.

[0104] It should be noted that the direction of the bottom of the opening groove 12 towards the opening is defined as the extending direction of the opening groove 12. In the embodiments of the present application, the extending direction of the opening groove 12 is defined as a vector direction. Among them, the fact that the opening directions of at least two opening grooves 12 on the body 1 form an included angle means that the opening directions of at least two opening grooves 12 on the body 1 are not in the same vector direction. For example, when two opening grooves 12 are provided on the body 1, the opening directions of the two opening grooves 12 can be two opposite vector directions on the same straight line direction, or the opening directions of the two opening grooves 12 can be located in two different straight line directions. Of course, in the case where more than two opening grooves 12 are provided on the body 1, the setting direction of the opening grooves 12 at least satisfies the case of setting two opening grooves 12. Among them, the included angle between the opening directions of at least two opening grooves is greater than or equal to 0 and less than or equal to 180 degrees.

[0105] The embodiments of the present application provide a battery, which includes a plurality of battery cells and a collecting wire circuit board. The collecting wire circuit board includes a body, and the body is provided with a plurality of collecting points for collecting the working parameters of the battery cells. The collecting points are electrically connected to the battery cells, and the plurality of collecting points are arranged at intervals. At least two opening grooves with an included angle in their opening directions are formed on the body. By providing the opening grooves on the body of the collecting wire circuit board in the present application, a weak area that is easy to deform can be formed on the body, and the conduction of the acting force can be blocked or reduced at the opening position, so that during the deformation of the battery cell, the deformation ability of the body at the opening groove position is greater than that of other positions, so that when the battery cell transfers the acting force of the deformation to the body, deformation can occur, thereby adapting to the relative change of the position of the collecting point caused by the expansion of the battery, and further being beneficial to reducing the pulling force on the collecting point, so as to improve the connection stability between the collecting wire circuit board and the battery cell, and then being beneficial to improving the stability and reliability of the battery operation; by providing at least two opening grooves with an included angle in their opening directions in the present application, the acting force can be reduced from at least two directions, and the deformation ability of the body in at least two directions can be ensured, which can further improve the stability of the collecting wire circuit board, so as to further improve the stability and reliability of the battery.

[0106] In some embodiments, such asFigure 2 As shown, the open slot 12 includes a first open slot 121 and a second open slot 122 with their opening directions forming an angle; the body 1 includes two first extension parts 13 and a connecting part 14. The two first extension parts 13 are arranged at intervals in the first direction N1, and the connecting part 14 connects the two first extension parts 13 to connect the two first extension parts 13 into one body. It should be noted that in the embodiment of the present application, by arranging the acquisition line circuit board with two first extension parts spaced in the first direction and adopting the structure of connecting the two first extension parts with a connecting part, it is beneficial to adapt to the situation of arranging multiple rows of battery monomers, for example Figure 3 As shown, multiple rows of battery monomers 2 are arranged in sequence in the first direction N1, and multiple battery monomers 2 in each row of battery monomers 2 are arranged in sequence in the second direction N2. By arranging two first extension parts 13, circuits can be arranged on each first extension part 13 to adapt to the acquisition of working parameters on different rows of battery monomers 2. Of course, in other embodiments, the battery monomers 2 can be arranged in more than two rows, and correspondingly, more than two first extension parts 13 can be arranged on the body 1, and multiple first extension parts 13 can be electrically connected through the connecting part 14, so as to realize the aggregation of the circuit.

[0107] As Figure 3 shown, each of the first extension parts 13 extends along the second direction N2. It should be noted that the second direction N2 can be the arrangement direction of multiple battery monomers 2 in each row of battery monomers 2. By setting the extension direction of the first extension part 13 as the arrangement direction of multiple battery monomers 2, it is beneficial to improve the space utilization rate of battery assembly and also beneficial to improve the connection stability between the battery monomers and the acquisition line circuit board.

[0108] As Figure 2 shown, a plurality of the acquisition points 11 are arranged at intervals on each of the first extension parts 13; the interval direction of the plurality of acquisition points 11 is the same as the arrangement direction of the plurality of battery monomers 2. A first open slot 121 is jointly formed between the two first extension parts 13 and the connecting part 14. The bottom of the first open slot 121 is formed by at least part of the edge of the connecting part 14, and the opening of the second open slot 122 is formed at the positions where the two first extension parts 13 are far away from the connecting part 14 in the second direction N2. Therefore, the opening direction of the first open slot 121 extends along the second direction N2.

[0109] As Figure 2As shown, at least one second opening groove 122 is provided on at least one first extension 13, and the first direction and the second direction are arranged at an angle. Herein, the second opening groove 122 is provided as at least one, that is to say, the second opening groove 122 can be provided as one, two, three or more, and at least one first extension 13 is provided with the second opening groove 122. At least part of the edge of the first extension 13 is recessed inward to form the second opening groove 122. The embodiment of the present application does not limit the opening direction of the second opening groove 122. The opening direction of the second opening groove 122 can be the first direction N1 or the third direction N3. The third direction N3 is a vector direction and is opposite to the first direction N1. Of course, the opening direction of the second opening groove 122 can also be any direction that does not coincide with the second direction N2.

[0110] In the embodiment of the present application, by providing the opening grooves as the first opening groove and the second opening groove, the first opening groove is jointly formed by two first extensions and a connecting portion, which is beneficial to adapting to the spaced arrangement of the positive and negative electrode posts in the same battery cell; by providing at least one second opening groove on at least the first extension, it is beneficial to form a weak area on the first extension to adapt to the position change of the pole post relative to the acquisition point during the expansion and contraction of the battery cell; reduce the pulling force on the acquisition point, so as to improve the stability of the connection between the acquisition line circuit board and the battery cell, thereby being beneficial to improving the stability and reliability of the battery operation.

[0111] In some embodiments, as Figure 2 shown, the opening of the first opening groove 121 faces the second direction, and the opening of the second opening groove 122 faces the first direction N1. Of course, in other embodiments, the opening direction of the second opening groove 122 can be the third direction N3 opposite to the first direction N1. In the embodiment of the present application, by making the opening of the first opening groove 121 face the second direction and the opening direction of the second opening groove face the first direction, wherein, when the first direction is perpendicular to the second direction, the direction of the second opening groove is perpendicular to the direction of the expansion and deformation of the battery cell, and the notch of the second opening groove is more conducive to deforming in the second direction to better adapt to the deformation of the battery cell, which is beneficial to improving the stability of the connection between the acquisition line circuit board and the battery cell.

[0112] In some embodiments, each of the first extensions 13 is provided with at least one of the second opening grooves 122. That is to say, when at least two first extensions 13 are provided on the body 1, each first extension 13 is provided with at least one second opening groove 122, and the number of the second opening grooves 122 provided can be set according to the number of the first extensions 13 provided.

[0113] By making the number of the second opening grooves 122 correspond to the number of the first extension parts 13, it is beneficial to improve the adaptability of each first extension part 13 to the deformation of the battery cell, and reduce the risk of breakage at the connection between the battery cell and the acquisition line circuit board.

[0114] In some embodiments, the opening groove 12 further includes a third opening groove 123, the third opening groove 123 is formed in at least one of the two first extension parts 13, and the opening direction of the third opening groove 123 forms an included angle with the opening direction of at least one of the first opening groove 121 and the second opening groove 122.

[0115] It should be noted that the opening direction of the third opening groove 123 may form an included angle with the opening direction of the first opening groove 121, and the third opening groove 123 may also form an included angle with the opening of the second opening groove 122. Among them, the explanation of the included angle setting is the same as that in the foregoing embodiments, that is to say, the opening direction of the third opening groove 123 may be opposite to the opening direction of the first opening groove 121, and may be set at an angle greater than 0 with the opening of the first opening groove 121. The opening direction of the third opening groove 123 and the opening direction of the second opening groove 122 may be opposite, or may be set at an angle greater than 0 with the opening direction of the second opening groove 122. That is to say, from the perspective of vectors, the opening direction of the third opening groove 123 is different from the directions of both the first opening groove 121 and the second opening groove 122.

[0116] In the embodiment of the present application, by providing a third opening groove on the first extension part 13, it is beneficial to improve the deformation ability of the first extension part 13, and the opening direction of the third opening groove forms an included angle with the opening direction of at least one of the first opening groove and the second opening groove, which is beneficial to enhancing the deformation ability of the body in the battery cell arrangement direction, so as to improve the adaptability of the body and reduce the risk of breakage at the connection between the battery cell and the body.

[0117] In some embodiments, as Figure 2 and Figure 3 shown, the opening of the first opening groove 121 faces the second direction N2, and the opening of the second opening groove 122 faces the first direction N1; the opening of the third opening groove 123 faces the third direction N3; wherein, the third direction is the reverse direction of the first direction. That is to say, the first direction and the third direction in the embodiment of the present application are two opposite vector directions. In some embodiments, both the first direction and the third direction are perpendicular to the second direction.

[0118] In the embodiment of the present application, by providing two opening grooves with opposite directions on the first extension part, it is beneficial to improve the uniformity of the deformation of the body in the second direction, thereby improving the uniform force of the body in the second direction and reducing the risk of local breakage of the body or reducing the risk of breakage at the connection between the body and the battery cell at a local position.

[0119] In some embodiments, as Figure 2 and Figure 3 shown, each first extension portion 13 is provided with at least one second opening groove 122 and at least one third opening groove 123. In the embodiments of the present application, by providing two opening grooves with opposite opening directions on each first extension portion 13, it is beneficial to further improve the uniformity of the deformation of the body in the second direction, thereby improving the force uniformity of the body in the second direction, reducing the risk of local fracture of the body, or reducing the risk of fracture at the connection between the body and the battery cell at a local position.

[0120] In some embodiments, as Figure 2 and Figure 3 shown, each first extension portion 13 is provided with a plurality of second opening grooves 122 arranged at intervals and a plurality of third opening grooves 123 arranged at intervals; wherein, the plurality means two or more, that is to say, the number of the second opening grooves 122 and the third opening grooves 123 provided in each first extension portion 13 is two or more.

[0121] It should be noted that the embodiments of the present application do not limit the layout manner of the second opening groove 122 and the third opening groove 123 on each first extension portion 13. In some embodiments, the second opening groove 122 and the third opening groove 123 are arranged alternately in the second direction N2. For example, one third opening groove 123 is arranged between every two second opening grooves 122, and one second opening groove 122 is arranged between every two third opening grooves 123. By arranging the second opening groove 122 and the third opening groove 123 on the same first extension portion 13 alternately, it is beneficial to improve the force uniformity of the body in the second direction N2, thereby reducing the risk of fracture at the connection between the local part of the body and the battery cell.

[0122] In the embodiments of the present application, the opening of the second opening groove 122 faces the first direction N1; the opening of the third opening groove 123 faces the third direction N3; the third direction N3 is the opposite direction of the first direction N1, so that at least a part of each first extension portion 13 has a meandering curved structure. The meandering curved structure means that the second opening groove 122 and the third opening groove 123 are arranged alternately, so as to form a concave-convex curved shape at the edge of the body. In the embodiments of the present application, by setting the body as a curved structure, without increasing the total length of the acquisition line circuit board, the adaptability of the body to the deformation of the battery cell can still be satisfied, which is beneficial to reducing the material cost of the acquisition line circuit board and improving the material utilization rate.

[0123] In some embodiments, as Figure 2 and Figure 3As shown, along the first direction N1, the second opening groove 122 and the third opening groove 123 are arranged in a staggered manner; and / or, along the second direction N2, the second opening groove 122 and the third opening groove 123 are arranged in a staggered manner. Specifically, in some embodiments, the second opening groove 122 and the third opening groove 123 are arranged in a staggered manner in the first direction N1, that is, the projections of the second opening groove 122 and the third opening groove 123 in the first direction do not overlap. In some embodiments, the second opening groove 122 and the third opening groove 123 are arranged in a staggered manner in the second direction N2, that is, the projections of the second opening groove and the third opening groove 123 in the second direction N2 do not overlap. By staggering the positions of the second opening groove 122 and the third opening groove 123 in the second direction or the third direction, on the basis of improving the deformation ability of the body, it is also beneficial to reduce the range of the weak area of the body jointly affected by the second opening groove and the third opening groove, so as to improve the structural strength of the entire acquisition line circuit board and reduce the risk of the acquisition line circuit board breaking.

[0124] In some embodiments, such as Figure 2 and Figure 3 As shown, the opening groove 12 further includes a sixth opening groove 126 and a seventh opening groove 127 with an included angle in the opening direction. The sixth opening groove 126 and the seventh opening groove 127 are respectively opened on both sides of the body 1 along the width direction. In the embodiment of the present application, in addition to setting the first opening groove 121, the second opening groove 122 and the third opening groove 123, the sixth opening groove 126 and the seventh opening groove 127 can also be set. The depths of the sixth opening groove 126 and the seventh opening groove 127 can be different from the depths of the second opening groove 122 and the third opening groove 123, and the positions of the sixth opening groove 126 and the seventh opening groove 127 in the second direction are different from the positions of the second opening groove 122 and the third opening groove 123. For example, the sixth opening groove 126 and the seventh opening groove 127 can be set at one end of the first extension portion 13 away from the connecting portion 14. By staggering the sixth opening groove 126 and the seventh opening groove 127 from the second opening groove and the third opening groove in the second direction and setting different depths, the positions of the sixth opening groove 126 and the seventh opening groove 127 can be staggered from the positions of the battery cells. By arranging opening grooves with different specifications, it is beneficial to improve the deformation ability of the body and reduce the risk of the acquisition line circuit board breaking.

[0125] In some embodiments, such as Figure 6 As shown, the opening groove includes a fourth opening groove 124 and a fifth opening groove 125 with an included angle in the opening direction. The body includes a second extension portion 15 extending along the second direction N2. The second extension portion 15 is in the width direction ( Figure 6On both sides in the directions of N1 and N2, a plurality of acquisition points 11 are arranged at intervals, and the fourth opening groove 124 and the fifth opening groove 125 are respectively opened on both sides of the body 1 in the width direction. It should be noted that the body in the embodiment of the present application is set as the second extension part 15 extending integrally. The difference between this body and the previous embodiment is that the body in the embodiment of the present application does not have two spaced first extension parts. The embodiment of the present application is set to have a structure without a first opening groove.

[0126] In some embodiments, such as Figure 7 shown, the opening grooves include a fourth opening groove 124 and a fifth opening groove 125 with an included angle in the opening direction. The fourth opening groove 124 and the fifth opening groove 125 are respectively opened on both sides of the body 1 in the thickness direction (refer to Figure 7 the N4 direction shown). By setting the body as a curved structure in the thickness direction in the embodiment of the present application, the adaptability of the body to the deformation of the battery cell can be satisfied, which is beneficial to reducing the material cost of the acquisition line circuit board and improving the material utilization rate. In some embodiments, along the thickness direction of the body 1, the fourth opening groove 124 and the fifth opening groove 125 are arranged in a staggered manner. In some embodiments, such as Figure 6 shown, the opening directions of the fourth opening groove 124 and the fifth opening groove 125 are opposite, so that at least part of the body is in a meandering shape. By setting the openings of the fourth opening groove 124 and the fifth opening groove 125 in different directions in the embodiment of the present application, it is beneficial to further improve the uniformity of the deformation of the body in the second direction, thereby improving the force uniformity of the body in the second direction, reducing the risk of local fracture of the body, or reducing the risk of fracture at the connection between the body and the battery cell at a local position.

[0127] In some embodiments, in combination with Figure 6As shown, along the width direction of the body, the fourth opening groove 124 and the fifth opening groove 125 are arranged in a staggered manner; and / or, along the length direction of the body, the fourth opening groove 124 and the fifth opening groove 125 are arranged in a staggered manner. Specifically, in some embodiments, the fourth opening groove 124 and the fifth opening groove 125 are arranged in a staggered manner in the width direction of the body, that is to say, the projections of the fourth opening groove 124 and the fifth opening groove 125 in the width direction of the body do not overlap. In some embodiments, the fourth opening groove 124 and the fifth opening groove 125 are arranged in a staggered manner in the length direction of the body, that is to say, the projections of the fourth opening groove 124 and the fifth opening groove 125 in the length direction of the body do not overlap. By staggering the positions of the fourth opening groove 124 and the fifth opening groove 125 in the length direction or the width direction of the body, on the basis of improving the deformation ability of the body, it is also beneficial to reduce the range of the weak area of the body jointly affected by the fourth opening groove 124 and the fifth opening groove 125, so as to improve the structural strength of the entire acquisition line circuit board and reduce the risk of fracture of the acquisition line circuit board. In some embodiments, in combination with Figures 2 - 4 As shown, the opening groove 12 is U-shaped or V-shaped; and / or, the depths of the opening grooves 12 are the same or different.

[0128] It should be noted that the U-shape means that the opening groove is a symmetric opening groove, and the edge of the body at the opening groove is smoothly arranged. The V-shape means that the opening groove is a symmetric structure, and the edge of the body at the opening groove is formed by connecting two inclined straight edges. In some embodiments, by setting the opening groove 12 in a U-shaped structure, it is beneficial to reduce the risk of stress concentration at the opening groove, so as to reduce the risk of fracture of the body.

[0129] It should be noted that the depth of the opening groove 12 refers to the distance from the bottom of the opening groove to the opening position. For example, when the second opening groove 122 extends along the second direction N2, the depth of the second opening groove 122 is the dimension of the second opening groove 122 in the second direction N2. The depths of different opening grooves may not be the same. For example, the depth of the first opening groove 121 is greater than the depth of the second opening groove 122 or the third opening groove 123, and the depth of the second opening groove 122 is less than the width of the first extension 13. In some embodiments, the depth of the second opening groove 122 is less than or equal to one-half of the width of the first extension 13, and the depth of the third opening groove 123 is less than or equal to one-half of the width of the first extension 13. By setting the depth of the second opening groove or the third opening groove to be less than or equal to one-half of the width of the first extension, it is beneficial to improve the structural strength of the body and reduce the risk of fracture caused by local stress concentration of the body.

[0130] In some embodiments, such as Figures 1 - 6As shown, all the open slots are located in the same plane. Compared with the embodiment where all the open slots are not in the same plane, by arranging the open slots in the same plane, it is beneficial to meet the adaptability of the deformation of the body and the battery cell without increasing the total length of the acquisition line circuit board, which is beneficial to reducing the material cost of the acquisition line circuit board and improving the material utilization rate.

[0131] In some embodiments, as Figures 1 - 6 shown, the body has a flat sheet-like structure; that is to say, there is generally no bending in the thickness direction of the body, and the extending directions of the open slots are all parallel to the extending direction of the body. It is beneficial to meet the adaptability of the deformation of the body and the battery cell without increasing the total length of the acquisition line circuit board, which is beneficial to reducing the material cost of the acquisition line circuit board and improving the material utilization rate.

[0132] In some embodiments, the length direction of the body is the stacking direction of multiple battery cells. Among them, the stacking direction of the battery cells can be understood as the large surface direction of the battery cells. The large surface refers to the surface with a larger area among the side surfaces of the battery cells. During the cyclic expansion process of the battery cells, the direction of the expansion force is in the opposite direction of the two large surfaces of the battery cells. That is to say, in the embodiments of the present application, the length direction of the body is consistent with the expansion direction of the battery cells, which is beneficial to making the deformable direction of the body consistent with the expansion direction of the battery cells, and is beneficial to reducing the risk of misalignment between the body and the battery cells, thereby reducing the risk of connection breakage and failure between the body and the battery cells.

[0133] In some embodiments, multiple open slots are arranged at intervals along the length direction of the body; and along the length direction of the body, at least one acquisition point is provided between any two adjacent open slots of the body.

[0134] In the embodiments of the present application, by arranging the open slots and the acquisition points in a staggered manner and spacing the open slots and the acquisition points, it can not only improve the deformation ability of the body but also reduce the interference of the open slots on the work of the acquisition points.

[0135] In some embodiments, as Figure 2 and Figure 3 shown, the battery further includes a connector 3, and the connector 3 is connected to one end of the body 1; the connector 3 is used to connect the body 1. Among them, the connector 3 is electrically connected to the circuit arranged in the body 1 to obtain the working parameters of the battery cells collected by each acquisition point. And transmit the working parameters of the battery cells to the controller.

[0136] The open slot 12 is opened at the end of the body 1 away from the connector 3. As Figure 2As shown, when the second opening groove 122 or the third opening groove 123 is provided in multiple numbers, the position where the second opening groove 122 or the third opening groove 123 is provided may be related to the position where the connector is provided. For example, the second opening groove 122 or the third opening groove 123 is provided at a position on the body far from the connector 3. In the battery, the connector 3 can be fixed to a part of the end plate or the box body in the battery. That is to say, the degree of deformation of the body near the connector position is small, and the battery cell at the position far from the connector has a large cumulative deformation amount. Therefore, the degree of deformation of the body at the position far from the connector is large.

[0137] In this application, by arranging the opening groove 12 at one end of the body 1 far from the connector 3, it is beneficial to meet the structural strength of the body near the connector position and can also adapt to the deformation at the position where the cumulative deformation of the battery cell is large.

[0138] In some embodiments, as Figure 2 shown, the maximum distance from the first opening groove 12 far from the connector 3 to the last opening groove 12 closest to the connector 3 is the first distance L1, and the length of the body 1 is the second distance L2. The first distance L1 is greater than or equal to one-half of the second distance L2.

[0139] Among them, the length range where the opening groove 12 is arranged on the body 1 accounts for more than one-half of the total length of the body 1. Figure 2 The length of the body 1 in [description] is the maximum dimension of the body 1 in the second direction N2.

[0140] By limiting the ratio of the length where the opening groove is arranged to the total length of the body in this application, it is beneficial to improve the structural strength of the acquisition line circuit board on the basis of improving the ability of the acquisition line circuit board to adapt to the expansion of the battery cell and reduce the risk of the acquisition line circuit board breaking.

[0141] In some embodiments, as Figure 2 shown, the battery further includes a connector 3, and the connector 3 is connected to one end of the body 1; a fixing through hole 4 is opened at one end of the body 1 far from the connector 3. The fixing through hole 4 is used to fix the acquisition line circuit board to other positions in the end plate or the box body in the battery, so as to improve the stability of the position setting of the acquisition line circuit board and reduce the risk of the acquisition line circuit board shaking. By arranging the fixing through hole 4 at a position far from the connector 3 in this application, one end of the body at the connector has a fixed relationship with the connector, and the fixing through hole 4 is beneficial to improve the stability of the position of the body at the end far from the connector.

[0142] In some embodiments, as Figure 3As shown, the battery further includes an explosion-proof valve 6, and the explosion-proof valve 6 is disposed on the side of the battery cell 2 close to the body 1. It should be noted that in the embodiments of the present application, the position where the explosion-proof valve 6 is disposed is not limited to the side close to the body 1 or the side away from the body 1. In some embodiments, when the explosion-proof valve 6 is disposed on the side close to the body 1, an avoidance through-hole 5 may be provided on the body 1, and the avoidance through-hole 5 is used to avoid the explosion-proof valve 6 of the battery cell. That is to say, when the internal pressure value of the battery cell 2 is greater than the set value, the battery cell 2 will break through the explosion-proof valve 6 and relieve pressure through the explosion-proof valve 6. By providing the avoidance through-hole 5 at the position corresponding to the explosion-proof valve 6 on the body 1, it is beneficial to reduce the interference of the body 1 on the pressure relief process of the explosion-proof valve 6, improve the pressure relief efficiency of the explosion-proof valve 6, and also be beneficial to reducing the risk of damage to the body 1 caused by excessive temperature during the pressure relief process of the explosion-proof valve.

[0143] In some embodiments, as Figure 3 shown, the number of battery cells 2 is multiple, the number of avoidance through-holes 5 is one or more, and when the number of avoidance through-holes 5 is multiple, each avoidance through-hole 5 corresponds to at least one explosion-proof valve 6 of a battery cell. In the embodiments of the present application, by setting the avoidance through-holes 5 to be multiple and each avoidance through-hole 5 corresponding to one explosion-proof valve 6, it is beneficial to reduce the interference of the body on the explosion-proof valve as much as possible and improve the pressure relief efficiency of the explosion-proof valve.

[0144] In some embodiments, in combination with Figure 5 shown, multiple battery cells 2 are electrically connected through multiple bus bars 9, and each acquisition point 11 is electrically connected to the corresponding bus bar 9 through an acquisition nickel sheet. In the embodiments of the present application, the acquisition point and the bus bar are connected through an acquisition nickel sheet, which is beneficial to improving the stability and reliability of the connection. The nickel sheet has good electrical conductivity and thermal conductivity, can effectively transfer current and heat, and ensure that there is no overheating phenomenon at the connection. The nickel sheet has good corrosion resistance, can resist oxidation and corrosion, and maintain a good connection state. It is beneficial to extend the service life of the connection, reduce the frequency of maintenance and replacement. The nickel sheet connection can also reduce the resistance of the connection and improve the transmission efficiency of the circuit.

[0145] In some embodiments, as Figure 2 and Figure 3 shown, the battery further includes a temperature collector 7, and the temperature collector 7 is disposed on the body. The temperature collector 7 is used to collect the temperature of the battery cell 2. In the embodiments of the present application, the specific position where the temperature collector 7 is disposed is not limited, and the specific position of the temperature collector can be set according to different simulation results in the actual product.

[0146] In some embodiments, as Figure 2 and Figure 3As shown, at least two temperature collectors 7 are provided, and the at least two temperature collectors 7 are arranged at intervals on the body 1. The at least two temperature collectors 7 mean that the number of temperature collectors 7 provided can be two or more. For example, it can be set to three, four, five, etc., and the positions of the multiple temperature collectors can be different. For example, the multiple temperature collectors 7 are arranged at intervals in the length direction of the body, which is beneficial to obtaining the temperatures of the battery cells at multiple positions inside the battery by using multiple temperature collectors. Among them, the temperature collector 7 can be connected to the Deba piece in the battery cell to collect the temperature of the Deba piece.

[0147] In some embodiments, as Figure 2 shown, at least one temperature collector 7 is arranged in the middle of the body 1 in the length direction, and at least one temperature collector 7 is arranged at the end of the body 1 in the length direction. By arranging the two temperature collectors 7 at intervals at the end and the middle of the battery cell arrangement, it is beneficial to improve the data accuracy of temperature collection, thereby improving the stability of battery operation.

[0148] The embodiment of the present utility model also provides a collecting wire circuit board, as Figure 2 shown, the collecting wire circuit board includes a body, and the body is provided with a plurality of collecting points for collecting the working parameters of the battery cells, and the plurality of collecting points are arranged at intervals; and at least two opening grooves with an included angle in the opening direction are formed on the body. In the embodiment of the present application, by providing the opening grooves on the body of the collecting wire circuit board, a weak area that is easy to deform can be formed on the body, and the transmission of the acting force can be blocked or reduced at the opening position, so that during the deformation of the battery cell, the deformation ability of the body at the opening groove position is greater than that of other positions, so that deformation can occur when the acting force of the battery cell deformation is transmitted to the body, thereby adapting to the relative change of the position of the collecting points caused by the battery expansion, and further being beneficial to reducing the pulling force on the collecting points, so as to improve the connection stability between the collecting wire circuit board and the battery cell, and then being beneficial to improving the stability and reliability of battery operation;

[0149] On the other hand, by providing at least two opening grooves with an included angle in the opening direction in the present application, the acting force can be reduced from at least two directions, and the deformation ability of the body in at least two directions can be ensured, which can further improve the stability of the collecting wire circuit board, so as to further improve the stability and reliability of the battery.

[0150] In some embodiments, the opening groove includes a first opening groove and a second opening groove with an included angle in the opening direction;

[0151] The body includes two first extension parts spaced in a first direction, and a connecting part connecting the two first extension parts. Each first extension part extends along a second direction, and a plurality of collecting points are arranged at intervals on each first extension part;

[0152] A first opening groove is jointly formed between the two first extension parts and the connecting part. At least one of the first extension parts is provided with a second opening groove, and the first direction and the second direction are arranged at an angle.

[0153] In some embodiments, the opening groove further includes a third opening groove, which is provided in at least one of the two first extension parts, and the opening direction of the third opening groove is arranged at an angle with the opening direction of at least one of the first opening groove and the second opening groove.

[0154] In some embodiments, the opening groove includes a fourth opening groove and a fifth opening groove with their opening directions at an angle;

[0155] The main body includes a second extension part extending in the second direction. A plurality of acquisition points are spaced apart on both sides of the second extension part in the width direction. The fourth opening groove and the fifth opening groove are respectively provided on both sides of the main body in the width direction and / or the thickness direction.

[0156] In some embodiments, the opening groove is U-shaped or V-shaped; and / or, the depths of the opening grooves are the same or different.

[0157] The embodiment of the present utility model further provides an electrical device, including the battery according to any one of the above embodiments or the acquisition line circuit board according to any one of the above embodiments. In the embodiment of the present application, at least two opening grooves with their opening directions at an angle are provided on the main body of the acquisition line circuit board in the electrical device, so as to form a weak area on the main body. During the deformation process of the battery cell, the deformation ability of the weak area is greater than that of the non-weak area. When the battery cell transfers the acting force of deformation to the main body, the weak area of the main body is more likely to deform, thereby realizing the relative change of the positions of the acquisition points to adapt to the expansion and contraction of the battery cell, which is beneficial to reducing the pulling force at the acquisition points, improving the connection stability between the acquisition line circuit board and the battery cell, and thus improving the working stability and reliability of the electrical device.

[0158] Except for the embodiments of the above claims, specific embodiments involving more specific features or combinations thereof may be preferred and may be shown in the drawings.

[0159] Although the present application has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized in that: include: A plurality of electrically connected battery cells; The collection line circuit board comprises a main body, the main body is provided with a plurality of collection points for collecting the working parameters of the plurality of battery cells, the collection points are electrically connected to the battery cells, and the plurality of collection points are arranged at intervals; and the main body is provided with at least two opening grooves with openings facing at an angle.

2. The battery according to claim 1, characterized in that The opening slot includes a first opening slot and a second opening slot with openings at an angle; The body comprises two first extension parts spaced apart in a first direction, and a connecting part connecting the two first extension parts, each of the first extension parts extends along the second direction, and a plurality of the collection points are spaced apart on each of the first extension parts; The first opening groove is formed between the two first extension parts and the connecting part, the second opening groove is formed on at least one of the first extension parts, and the first direction and the second direction are arranged at an angle.

3. The battery according to claim 2, characterized in that The opening of the first opening slot faces the second direction, and the opening of the second opening slot faces the first direction.

4. The battery according to claim 2, characterized in that Each of the first extension portions is provided with at least one second opening groove.

5. The battery according to claim 2, characterized in that The opening slot also includes a third opening slot, which is opened in at least one of the two first extension portions, and the opening direction of the third opening slot is set at an angle to the opening direction of at least one of the first opening slot and the second opening slot.

6. The battery according to claim 5, characterized in that The opening of the first opening slot faces the second direction, the opening of the second opening slot faces the first direction; the opening of the third opening slot faces the third direction; The third direction is the opposite direction of the first direction.

7. The battery according to claim 5, characterized in that Each of the first extension portions is provided with at least one of the second opening slots and at least one of the third opening slots.

8. The battery according to claim 7, characterized in that Each of the first extension portions is provided with a plurality of the second opening slots arranged at intervals and a plurality of the third opening slots arranged at intervals; The opening of the second opening slot faces the first direction; the opening of the third opening slot faces the third direction; The third direction is the opposite direction of the first direction, so that at least a portion of each of the first extension portions is in a meandering structure.

9. The battery according to claim 5, characterized in that Along the first direction, the second opening slot and the third opening slot are staggered; and / or, along the second direction, the second opening slot and the third opening slot are staggered.

10. The battery according to claim 1, characterized in that The opening slots include a fourth opening slot and a fifth opening slot whose opening directions are at an angle; The body comprises a second extension portion extending along a second direction, the second extension portion is provided with a plurality of collection points at intervals on both sides in a width direction, and the fourth opening slot and the fifth opening slot are respectively provided on both sides of the body along the width direction and / or thickness direction.

11. The battery according to claim 10, characterized in that The fourth opening slot and the fifth opening slot have openings in opposite directions, so that at least a portion of the body is in a meandering shape.

12. The battery according to claim 10, characterized in that The fourth opening groove and the fifth opening groove are staggered along the width direction of the main body; and / or, the fourth opening groove and the fifth opening groove are staggered along the length direction of the main body; and / or, the fourth opening groove and the fifth opening groove are staggered along the thickness direction of the main body.

13. The battery according to any one of claims 1 to 12, characterized in that The opening grooves are U-shaped or V-shaped; and / or the depths of the opening grooves are the same or different.

14. The battery according to any one of claims 1 to 12, characterized in that All of the opening grooves are located in the same plane; and / or the body is a flat sheet structure; and / or the length direction of the body is the stacking direction of the plurality of battery cells.

15. The battery according to any one of claims 1 to 12, characterized in that A plurality of the opening grooves are arranged at intervals along the length direction of the body; And along the length direction of the main body, the main body is provided with at least one collection point between any two adjacent opening grooves.

16. The battery according to any one of claims 1 to 12, characterized in that Also included is a connector, the connector being connected to one end of the body; The opening slot is disposed at an end of the body away from the connector.

17. The battery according to claim 16, characterized in that The longest distance from the first opening slot farthest from the connector to the last opening slot closest to the connector is a first distance, the length of the body is a second distance, and the first distance is greater than or equal to half of the second distance.

18. The battery according to any one of claims 1 to 12, characterized in that Also included is a connector, the connector being connected to one end of the body; A fixing through hole is formed at one end of the body away from the connector.

19. The battery according to any one of claims 1 to 12, characterized in that The battery also includes: An explosion-proof valve, arranged on a side of the battery cell close to the body; The body is provided with an avoidance through hole, and the avoidance through hole is used to avoid the explosion-proof valve.

20. The battery according to claim 19, characterized in that The number of the battery cells is multiple, the number of the avoidance through holes is one or more, and when the number of the avoidance through holes is multiple, each of the avoidance through holes corresponds to at least one explosion-proof valve of the battery cell.

21. The battery according to any one of claims 1 to 12, characterized in that The plurality of battery cells are electrically connected via a plurality of nickel plates, and each of the collection points is electrically connected to the corresponding nickel plate via a collection nickel plate.

22. The battery according to any one of claims 1 to 12, characterized in that It also includes a temperature collector, which is arranged on the main body to collect the temperature of the battery cell.

23. The battery according to claim 22, characterized in that The number of the temperature collectors is at least two, and the at least two temperature collectors are spaced apart on the body.

24. A collection line circuit board, characterized in that: include: The main body is provided with a plurality of collection points for collecting the working parameters of the battery cells, and the plurality of collection points are arranged at intervals; and the main body is provided with at least two opening grooves with openings facing at an angle.

25. The acquisition line circuit board according to claim 24, characterized in that: The opening slot includes a first opening slot and a second opening slot with openings at an angle; The body comprises two first extension parts spaced apart in a first direction, and a connecting part connecting the two first extension parts, each of the first extension parts extends along the second direction, and a plurality of the collection points are spaced apart on each of the first extension parts; The first opening groove is formed between the two first extension parts and the connecting part, the second opening groove is formed on at least one of the first extension parts, and the first direction and the second direction are arranged at an angle.

26. The acquisition line circuit board according to claim 25, characterized in that: The opening slot also includes a third opening slot, which is opened in at least one of the two first extension portions, and the opening direction of the third opening slot is set at an angle to the opening direction of at least one of the first opening slot and the second opening slot.

27. The acquisition line circuit board according to claim 24, characterized in that: The opening slots include a fourth opening slot and a fifth opening slot whose opening directions are at an angle; The body comprises a second extension portion extending along a second direction, the second extension portion is provided with a plurality of collection points at intervals on both sides in a width direction, and the fourth opening slot and the fifth opening slot are respectively provided on both sides of the body along the width direction and / or thickness direction.

28. The acquisition line circuit board according to any one of claims 24 to 27, characterized in that: The opening grooves are U-shaped or V-shaped; and / or the depths of the opening grooves are the same or different.

29. An electrical equipment, characterized in that: It comprises the battery according to any one of claims 1 to 23 or the collection line circuit board according to any one of claims 24 to 28.

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