Battery components, battery packs and vehicles

Abstract

The present disclosure provides a battery assembly, a battery pack, and a vehicle, belonging to the field of battery technology. The battery assembly includes a battery array and a voltage collection assembly disposed on one side thereof. The battery array includes at least one first battery, the first battery including a first electrode and a second electrode, the distance between the first electrode and the voltage collection assembly being greater than the distance between the second electrode and the voltage collection assembly, the first electrode of the first battery being electrically connected to the housing of the first battery so that the potential of the first electrode and the housing of the first battery are equal; the voltage collection assembly includes a first collection terminal, the first collection terminal being connected to the housing of the first battery and being used to collect the potential of the first electrode through the housing of the first battery; and a second collection terminal, the second collection terminal being connected to the second electrode and being used to collect the potential of the second electrode. The present disclosure can effectively reduce the difficulty of voltage collection by the voltage collection assembly and facilitate voltage collection.

Description

Technical Field

[0001] This disclosure relates to the field of battery technology, and more particularly to a battery component, battery pack, and vehicle. Background Technology

[0002] This year, the country's vigorous promotion of the development of new energy vehicles has greatly boosted the development of power batteries. With continuously increasing demand, higher requirements are being placed on the energy density of battery packs.

[0003] Currently, voltage acquisition for battery modules uses flexible printed circuits (FPCs). Typically, the FPC is placed between the upper surface of multiple batteries and the module cover, and the voltage is acquired by spanning both sides of the entire module, which is inconvenient for voltage acquisition.

[0004] The information disclosed in the background section is only for enhancing the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this disclosure is to provide a battery component, battery pack, and vehicle that reduces the difficulty of voltage acquisition components and facilitates voltage acquisition.

[0006] To achieve the above-mentioned objectives, the present disclosure adopts the following technical solution:

[0007] According to a first aspect of this disclosure, a battery assembly is provided, comprising:

[0008] Battery array and voltage acquisition component disposed on one side of the battery array;

[0009] The battery bank includes,

[0010] At least one first battery, the first battery including a first electrode and a second electrode, the distance between the first electrode and the voltage acquisition component is greater than the distance between the second electrode and the voltage acquisition component, the first electrode of the first battery is electrically connected to the casing of the first battery so that the potentials of the first electrode and the casing of the first battery are equal;

[0011] The voltage acquisition component includes,

[0012] The first acquisition end is connected to the casing of the first battery and is used to acquire the potential of the first electrode through the casing of the first battery.

[0013] The second acquisition terminal is connected to the second electrode and is used to acquire the potential of the second electrode.

[0014] According to a second aspect of this disclosure, a battery pack is provided, including the battery assembly described in the first aspect.

[0015] According to a third aspect of this disclosure, a vehicle is provided, including the battery pack described in the second aspect.

[0016] The battery assembly disclosed herein connects the first electrode of the first battery to its casing, such that the potential of the casing is equal to the potential of the first electrode. Based on this, the voltage acquisition component can directly acquire the potential of the first electrode through the casing, eliminating the need to traverse the entire battery array to acquire the potential of the other electrode. This battery assembly effectively reduces the difficulty of voltage acquisition and facilitates voltage acquisition. Attached Figure Description

[0017] The above and other features and advantages of this disclosure will become more apparent from a detailed description of exemplary embodiments thereof with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the battery assembly structure in an exemplary embodiment of this disclosure;

[0019] Figure 2 This is a schematic diagram of battery module voltage acquisition in an exemplary embodiment of this disclosure;

[0020] Figure 3 This is a schematic diagram of battery module voltage acquisition in another exemplary embodiment of this disclosure;

[0021] Figure 4 This is a schematic diagram of battery module voltage acquisition in yet another exemplary embodiment of this disclosure;

[0022] Figure 5 This is a schematic diagram of battery module voltage acquisition in yet another exemplary embodiment of this disclosure;

[0023] Figure 6 This is a schematic diagram showing the connection between the third or fourth electrode and the housing in an exemplary embodiment of this disclosure;

[0024] Figure 7 This is a schematic diagram showing the connection between the third or fourth electrode and the housing in another exemplary embodiment of this disclosure;

[0025] Figure 8 This is a schematic diagram showing the connection between the third or fourth electrode and the housing in yet another exemplary embodiment of this disclosure;

[0026] Figure 9 This is a circuit analysis diagram of a first or second battery connected to a resistor in an exemplary embodiment of this disclosure;

[0027] Figure 10This is a circuit analysis diagram of an exemplary embodiment of the present disclosure in which a first battery or a second battery is connected to an insulating pad;

[0028] Figure 11 This is a schematic diagram of the first battery structure in an exemplary embodiment of this disclosure;

[0029] Figure 12 This is a schematic diagram of the second battery structure in an exemplary embodiment of this disclosure;

[0030] Figure 13 This is a schematic planar view of the first battery in an exemplary embodiment of this disclosure;

[0031] Figure 14 This is a schematic diagram of the second battery planar representation in an exemplary embodiment of this disclosure;

[0032] Figure 15 This is a schematic diagram of the structure of the busbar connecting to the battery in an exemplary embodiment of this disclosure;

[0033] Figure 16 This is a schematic diagram of the structure of the busbar connecting to the battery in another exemplary embodiment of this disclosure;

[0034] Figure 17 This is a schematic diagram of the connecting piece connection structure in an exemplary embodiment of this disclosure;

[0035] Figure 18 This is a schematic diagram of the connection structure between the first acquisition terminal and the second acquisition terminal in an exemplary embodiment of this disclosure;

[0036] Figure 19 This is a schematic diagram of the structure of the first voltage acquisition component and the second voltage acquisition component in an exemplary embodiment of this disclosure.

[0037] The annotations for the main components in the diagram are explained below:

[0038] 100 - Battery array; 110 - First battery; 111 - First electrode; 112 - Second electrode; 113 - First surface; 13a - First region; 13b - Second region; 13c - Third region; 13d - Fourth region; 114 - Second surface; 120 - Second battery; 121 - Third electrode; 122 - Fourth electrode; 123 - Third surface; 23a - Fifth region; 23b - Sixth region; 23c - Seventh region; 23d - Eighth region; 124 - Fourth surface; 200 - Voltage acquisition component; 210 - First acquisition terminal; 220 - Second acquisition terminal 230 - First voltage acquisition component; 231 - First flexible circuit board; 232 - First low-voltage connector; 240 - Second voltage acquisition component; 241 - Second flexible circuit board; 242 - Second low-voltage connector; 300 - Fuse structure; 400 - Resistor; 500 - Insulating pad; 600 - Busbar; 610 - First busbar; 611 - First segment; 612 - Second segment; 620 - Second busbar; 621 - Third segment; 622 - Fourth segment; 700 - Connecting piece; 710 - Insulating component; 810 - First fixing frame; 820 - Second fixing frame. Detailed Implementation

[0039] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are set forth to give a full understanding of embodiments of this disclosure.

[0040] For clarity, the thickness of regions and layers may be exaggerated in the figures. The same reference numerals in the figures denote the same or similar structures, and therefore their detailed descriptions will be omitted.

[0041] The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of the specific details described, or other methods, components, materials, etc., can be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring the main technical concept of this disclosure.

[0042] When a structure is "on" other structures, it may mean that the structure is integrally formed on other structures, or that the structure is "directly" set on other structures, or that the structure is "indirectly" set on other structures through another structure.

[0043] The terms “a,” “one,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and that other elements / components / etc. may exist in addition to those listed. The terms “first” and “second” are used only as markers and are not a limitation on the number of objects.

[0044] like Figure 1 , Figure 2 As shown, this embodiment of the present disclosure provides a battery assembly, including a battery array 100 and a voltage acquisition component 200 disposed on one side of the battery array 100. The battery array 100 includes at least one first battery 110. The first battery 110 includes a first electrode 111 and a second electrode 112. The distance between the first electrode 111 and the voltage acquisition component 200 is greater than the distance between the second electrode 112 and the voltage acquisition component 200. The first electrode 111 of the first battery 110 is electrically connected to the casing of the first battery 110, so that the potentials of the first electrode 111 and the casing of the first battery 110 are equal. The voltage acquisition component 200 includes a first acquisition terminal 210 and a second acquisition terminal 220. The first acquisition terminal 210 is connected to the casing of the first battery 110 and is used to acquire the potential of the first electrode 111 through the casing of the first battery 110. The second acquisition terminal 220 is connected to the second electrode 112 and is used to acquire the potential of the second electrode 112.

[0045] The battery assembly disclosed herein includes a battery array 100 and a voltage acquisition component 200 disposed on one side of the battery array 100. The battery array 100 includes at least one first battery 110. The distance between the first electrode 111 of the first battery 110 and the voltage acquisition component 200 is greater than the distance between the second electrode 112 of the first battery 110 and the voltage acquisition component 200. In this disclosure, the first electrode 111 of the first battery 110 is connected to the casing of the first battery 110, such that the potential of the casing of the first battery 110 is equal to the potential of the first electrode 111. Based on this, the voltage acquisition component 200 can directly acquire the potential of the first electrode 111 through the casing, without needing to traverse the entire battery array 100 to acquire the potential of the electrode on the other side. This battery assembly effectively reduces the difficulty of voltage acquisition by the voltage acquisition component 200, facilitating voltage acquisition.

[0046] The components of the battery assembly provided in this disclosure embodiment will now be described in detail with reference to the accompanying drawings.

[0047] like Figure 2As shown, the battery assembly includes a battery array 100 and a voltage acquisition component 200 disposed on one side of the battery array 100. The battery array 100 includes at least one first battery 110. The first battery 110 can be an aluminum-cased battery, an iron-cased battery, or a copper-cased battery, etc. The first battery 110 includes a first electrode 111 and a second electrode 112. The distance between the first electrode 111 and the voltage acquisition component 200 is greater than the distance between the second electrode 112 and the voltage acquisition component 200. The first electrode 111 of the first battery 110 is electrically connected to the casing of the first battery 110 so that the potentials of the first electrode 111 and the casing of the first battery 110 are equal. For a single first battery 110, one of the first electrode 111 and the second electrode 112 is a positive electrode and the other is a negative electrode. It should be noted that the electrical connection in this disclosure refers to a connection form in which the circuit between the various components is achieved through wires or metal conductive parts, etc. The first electrode 111 of the first battery 110 is electrically connected to the casing of the first battery 110, that is, the first electrode 111 is connected to the casing through a metal conductive component, so that the potential of the first electrode 11 is equal to the potential of the casing.

[0048] like Figure 2 As shown, in some embodiments, the battery array 100 includes a first battery 220, in Figure 2 In the first battery 110, the first acquisition terminal 210 of the voltage acquisition component 200 is connected to the casing of the first battery 110 and is used to acquire the potential of the first electrode 111, specifically the acquired potential is v0. The second acquisition terminal 220 of the voltage acquisition component 200 is connected to the second electrode 112 of the first battery 110 and is used to acquire the potential of the second electrode 112, specifically the acquired potential is v1. Therefore, the voltage of the first battery 110 is v0-v1.

[0049] like Figures 3 to 5 As shown, in some embodiments of this disclosure, the battery array 100 further includes at least one second battery 120, which is electrically connected to the first battery 110. The second battery 120 and the second battery 110 are electrically connected, meaning they are connected in series or parallel via wires or metal conductive components (such as busbars). Preferably, when the second battery 120 and the first battery 110 are electrically connected, the third electrode 121 and the first electrode 111 are connected using a metal conductive component. In this connection method, the connection distance between the third electrode 121 and the second electrode 111 is shorter, making the connection more convenient.

[0050] In a specific embodiment, the second battery 120 includes a third electrode 121 and a fourth electrode 122. The distance between the third electrode 121 and the voltage acquisition component 200 is greater than the distance between the fourth electrode 122 and the voltage acquisition component 200. The second acquisition terminal 120 is connected to the fourth electrode 122 to acquire the potential of the fourth electrode 122. For a single second battery 120, one of the third electrode 121 and the fourth electrode 122 is a positive electrode, and the other is a negative electrode. In this embodiment, the second acquisition terminal 120 of the voltage acquisition component 200 is connected to either the second electrode 112 or the fourth electrode 122 to acquire the potential of either the second electrode 112 or the fourth electrode 122. Specifically, there are multiple second acquisition terminals 120. When it is necessary to acquire the potential of the second electrode 112, the second acquisition terminal 120 is connected to the second electrode 112; when it is necessary to acquire the potential of the fourth electrode 122, the second acquisition terminal 120 is connected to the fourth electrode 122.

[0051] like Figure 3 As shown, in one embodiment, a first battery 110 and a plurality of second batteries 120 are connected in parallel to form a battery array 100. Taking an aluminum-cased battery as an example, the casings of the first battery 110 and the second battery 120 are made of aluminum. In this case, the first electrode 111 and the third electrode 121 are both positive electrodes, and the second electrode 112 and the fourth electrode 122 are both negative electrodes. The potentials of the first electrode 111 of the first battery 110 and the third electrodes 121 of the plurality of second batteries 120 are equal, and the potentials of the second electrode 112 of the first battery 110 and the fourth electrodes 122 of the plurality of second batteries 120 are equal. The positive electrode of the first battery 110 is electrically connected to the casing of the first battery 110, such that the potential of the casing of the first battery 110 is equal to the potential of the casing of the first electrode 111. The first acquisition terminal 210 of the voltage acquisition component 200 is connected to the casing of the first battery 110, and the second acquisition terminal 220 is connected to the second electrode 112 or the fourth electrode 122. At this time, the first acquisition terminal 210 acquires the potential of the first electrode 111 and the third electrode 121 (positive electrode) as v0, and the second acquisition terminal 220 acquires the potential of the second electrode 112 and the fourth electrode 122 (negative electrode) as v1. Then, the voltage of the first battery 110 and the second battery 120 is v0-v1.

[0052] like Figure 4As shown, in another embodiment, the first battery 110 and the second battery 120 are connected in series to form a battery array 100. There can be multiple first batteries 110 and second batteries 120, which are spaced apart. Again, taking an aluminum-cased battery as an example, in this case, the first electrode 111 of each first battery 110 and the fourth electrode 122 of each second battery 120 are both positive electrodes, and the second electrode 112 of each first battery 110 and the third electrode 121 of each second battery 120 are both negative electrodes. The first electrode 111 of the first battery 110 and the third electrode 121 of the second battery 120 are electrically connected, and the potentials of adjacent first electrodes 111 of the first battery 110 and third electrodes 121 of the second battery 120 are equal. The first acquisition terminal 210 of the voltage acquisition component 200 is connected to the casing of the first battery 110, and the second acquisition terminal 220 is connected to either the second electrode 112 or the fourth electrode 122. Taking the first battery 110 on the left in the diagram as an example, the first acquisition terminal 210 acquires the potential of the first electrode 111 (positive electrode) of this battery, v1, through the casing. The second acquisition terminal 220 acquires the potential of the second electrode 112 (negative electrode) of this battery, v0. Therefore, the voltage of the first battery 110 is v1 - v0. Taking the first battery 120 as an example, the potential of the third electrode 121 (negative electrode) of this battery is equal to that of the first electrode 111 (positive electrode) of the first battery 110, specifically v1, acquired by the first acquisition terminal 210. The potential of the fourth electrode 122 (negative electrode) of this battery 120 is acquired by the second acquisition terminal 220, specifically v2. Therefore, the voltage of the first battery 120 is v2 - v1. And so on, the voltages of the other batteries can be obtained.

[0053] like Figure 5As shown, in another embodiment, the first battery 110 and the second battery 120 are connected in series and in parallel to form a battery array 100. In the figure, two second batteries 120 are connected in parallel and then in series with one first battery 110. Taking an aluminum-cased battery as an example, the first electrode 111 of the first battery 110 is the positive electrode, and the second electrode 112 is the negative electrode. The third electrode 121 of the second battery 120 is the negative electrode, and the fourth electrode 122 is the positive electrode. Taking the first first battery 110 on the left in the figure as an example, the first acquisition terminal 210 acquires the potential v1 of the first electrode 111 (positive electrode) of the first battery 110 through the casing, and the second acquisition terminal 220 acquires the potential v0 of the second electrode 112 (negative electrode) of the battery. Therefore, the voltage of the first battery 110 is v1-v0. Taking the first second battery 120 as an example, the potential of its third electrode 121 (negative electrode) is equal to that of the first electrode 111 (positive electrode) of the first battery 110, specifically v1 obtained through the first acquisition terminal 210. The potential of the fourth electrode 122 (negative electrode) of the second battery 120 is obtained through the second acquisition terminal 220, specifically v2. Therefore, the voltage of the first second battery 120 is v2-v1. The second second battery 120 is connected in parallel with the first second battery 120, so the voltage of the second second battery 120 is also v2-v1. This process can be repeated to obtain the voltages of the other batteries.

[0054] In some embodiments of this disclosure, the casing of the first battery 110 is an aluminum casing made of aluminum material, and the corresponding electrode connected to the aluminum casing is the positive electrode. Aluminum casings are widely used in power batteries due to their low cost, light weight, and good heat dissipation. In a normal aluminum-cased battery, there is a potential difference between the positive electrode, casing, and negative electrode, which can cause corrosion of the aluminum casing under certain conditions. The octahedral voids in the aluminum lattice are similar in size to those of lithium, making it highly susceptible to forming intermetallic compounds with lithium ions. When the negative electrode post or tab of the battery contacts the aluminum casing, the aluminum casing has a low potential, allowing lithium ions in the electrolyte to embed into the aluminum casing, producing lithium-intercalated aluminum compounds and causing casing corrosion. This disclosure electrically connects the positive electrode of the first battery 110 to the aluminum casing, ensuring that the aluminum casing is at a high potential, preventing lithium ions in the electrolyte from embedding into the aluminum casing, and thus preventing aluminum casing corrosion.

[0055] In some embodiments of this disclosure, when the casing of the first battery 110 is an iron-based or copper-based material, the corresponding electrode connected to the iron-based or copper-based casing is the negative electrode. For iron-based or copper-based batteries, under certain conditions, the iron-based or copper-based casing may undergo electrochemical corrosion due to its high potential. Therefore, this disclosure electrically connects the negative electrode of the first battery 110 to the iron-based or copper-based casing to reduce the potential of the iron-based or copper-based casing and prevent corrosion.

[0056] Based on this, such as Figures 6 to 8As shown, in some embodiments, the third electrode 121 or the fourth electrode 122 of the second battery 120 is electrically connected to the casing of the second battery 120 to prevent corrosion of the battery casing. Accordingly, when the casing of the second battery 120 is an aluminum casing made of aluminum material, the corresponding electrode connected to the aluminum casing is the positive electrode. When the casing of the second battery 120 is an iron casing or a copper casing made of iron-based material or copper-based material, the corresponding electrode connected to the iron casing or copper casing is the negative electrode.

[0057] like Figures 3 to 8 As shown in some embodiments of this disclosure, when the electrodes of the battery are electrically connected to the casing, a fusible link 300 is connected between the electrodes and the casing. Specifically, a fusible link 300 is connected between the first electrode 111 of the first battery 110 and the casing of the first battery 110. When the third electrode 121 of the second battery 120 is electrically connected to the casing of the second battery 120, a fusible link 300 is connected between the third electrode 121 of the second battery 120 and the casing of the second battery 120; when the fourth electrode 122 of the second battery 120 is electrically connected to the casing of the second battery 120, a fusible link 300 is connected between the fourth electrode 122 of the second battery 120 and the casing of the second battery 120. The fusible link 300 acts as a protector to protect the first battery 110 and the second battery 120. When a short circuit occurs in the first battery 110 and / or the second battery 120 and the current exceeds a predetermined value, the fusible link 300 melts its fusible element with the heat it generates, breaking the circuit. The 300-type fuse structure can be a fuse, which can be a screw-type fuse or a fast-acting fuse, etc. The specific selection can be based on the protection characteristics of the load and the magnitude of the short-circuit current.

[0058] like Figure 9 As shown, in some embodiments of this disclosure, a resistor 400 is connected between the terminal of the first electrode 111 of the first battery 110 and the casing of the first battery 110. Specifically, the resistor 400 is disposed at the connection between the terminal of the first electrode 111 and the cover plate of the first battery 110, and the terminal of the first electrode 111 and the cover plate can be electrically connected through the resistor 400. The connection of the resistor 400 between the terminal of the first electrode 111 and the casing of the first battery 110 in this disclosure can effectively reduce the current of the battery during a short circuit and improve battery safety. Taking a lithium aluminum battery as an example, a resistor 400 is connected between the terminal of the first electrode 111 (positive electrode) of the first battery 110 and the casing of the first battery 110.

[0059] In some embodiments, the resistor 400 can be a high-temperature resistant resistor, ensuring its temperature resistance is higher than that of a typical battery under safety testing or short-circuit conditions. The high-temperature resistant resistor is preferably a conductive silicon carbide (SiC) high-temperature resistant resistor. Silicon carbide material has advantages such as stable chemical properties, high thermal conductivity, and low coefficient of thermal expansion. Furthermore, silicon carbide is also a good conductive material. Using silicon carbide as a high-temperature resistant resistor can better meet the requirements of conductivity and high-temperature resistance. Its good thermal conductivity can dissipate excess heat in a timely manner, preventing safety hazards caused by heat accumulation. Its low coefficient of thermal expansion and stable chemical properties ensure that silicon carbide can be used for a long time even under abusive environments. By selecting ceramic materials such as silicon carbide (SiC), the range of resistance values ​​for high-temperature resistant resistors can be expanded, while overcoming the problems of easy aging, structural instability, and poor long-term cycle performance of conductive plastic materials.

[0060] In some embodiments, the resistance range of resistor 400 can be selected according to actual needs. The blocking range of resistor 400 should enable the first electrode 111 of the first battery 110 to conduct to the aluminum casing, ensuring that the potential of the aluminum casing and the first electrode 111 is consistent, effectively preventing corrosion of the aluminum casing, and ensuring that no large current is generated when the battery is short-circuited, so as not to cause arcing. When the current exceeds the safe current, the fuse structure 300 can also melt smoothly, thus comprehensively ensuring the safety performance of the battery.

[0061] Similarly, to prevent corrosion of the casing of the second battery 120 and ensure its safety performance, when the third electrode 121 of the second battery 120 is electrically connected to the casing of the second battery 120, a resistor of 400Ω is connected between the terminal of the third electrode 121 of the second battery 120 and the casing of the second battery 120; when the fourth electrode 122 of the second battery 120 is electrically connected to the casing of the second battery 120, a resistor of 400Ω is connected between the terminal of the fourth electrode 122 of the second battery 120 and the casing of the second battery 120.

[0062] This disclosure achieves electrical conductivity between the battery casing and the corresponding electrode by connecting a resistor of 400Ω between the casing and the corresponding electrode, ensuring that the casing and the electrode have the same potential and effectively preventing corrosion of the casing. On the other hand, it effectively reduces the current when the battery is short-circuited, preventing arcing and further ensuring the safety performance of the battery.

[0063] Continue as Figure 9As shown, taking the series circuit of the first battery 110 and the second battery 120 as an example, the first battery 110 and the second battery 120 are lithium aluminum batteries. When a short circuit occurs in the casing of the first battery 110 and the second battery 120, the fuse structure 300 connecting the casing of the first battery 110 melts, while the fuse structure 300 of the second battery 120 remains intact. At this time, it is equivalent to the resistor 400 connected to the second battery 120 and the fuse structure 300 being connected in parallel and then in series with the resistor 400 of the first battery 110, connecting them to the two ends of the second battery 120. The resistor 400 of the first battery 110 shares a portion of the current, providing protection. The casing potential of the second battery 120 remains equal to V2, effectively preventing corrosion of the battery casing.

[0064] like Figure 10 As shown, in some other embodiments of this disclosure, an insulating pad 500 is connected between the terminal post of the first electrode 111 of the first battery 110 and the casing of the first battery 110. Specifically, the insulating pad 500 is disposed at the connection between the terminal post of the first electrode 111 and the cover plate of the first battery 110. Taking a lithium aluminum battery as an example, the insulating pad 500 is connected between the terminal post of the first electrode 111 (positive electrode) of the first battery 110 and the casing of the first battery 110 to ensure the insulation between the positive electrode terminal post and the casing, effectively preventing the battery from short-circuiting. In some embodiments, the insulating pad 500 can be a high-temperature resistant insulating pad, specifically made of a high-temperature resistant insulating material, such as polyimide, to ensure that its temperature resistance is higher than the temperature of the battery under general safety testing or short-circuit conditions.

[0065] Similarly, to ensure the safety performance of the second battery 120, when the third electrode 121 of the second battery 120 is electrically connected to the casing of the second battery 120, an insulating pad 500 is connected between the terminal of the third electrode 121 of the second battery 120 and the casing of the second battery 120; when the fourth electrode 122 of the second battery 120 is electrically connected to the casing of the second battery 120, an insulating pad 500 is connected between the terminal of the fourth electrode 122 of the second battery 120 and the casing of the second battery 120.

[0066] like Figure 1 , Figures 11 to 14 As shown, in some embodiments of this disclosure, the first battery 110 further includes a first battery body, which includes two opposing first surfaces 113 and four second surfaces 114 disposed around the first surfaces 113. The area of ​​the first surfaces 113 is larger than the area of ​​the second surfaces 114. A first electrode 111 and a second electrode 112 are disposed on the first surfaces 113.

[0067] The second battery 120 also includes a second battery body, which includes two opposing third surfaces 123 and four fourth surfaces 124 arranged around the third surfaces 123. The area of ​​the third surface 123 is larger than the area of ​​the fourth surface 124. The third electrode 121 and the fourth electrode 122 are disposed on the third surface 123.

[0068] The first surface 113 is divided into four regions, namely a first region 13a, a second region 13b, a third region 13c, and a fourth region 13d, which are arranged sequentially along a first direction. The distance between the first region 13a and the voltage acquisition component 200 is greater than the distance between the fourth region 13d and the voltage acquisition component 200. The first direction is parallel to the long side of the first surface 113. The first electrode 111 is disposed in the first region 13a, and the second electrode 112 is disposed in the fourth region 13d.

[0069] The third surface 123 is divided into five regions 23a, 23b, 23c, and 23d along the second direction. The distance between the fifth region 23a and the voltage acquisition component 200 is greater than the distance between the eighth region 23d and the voltage acquisition component 200. The second direction is parallel to the long side of the third surface 123. The third electrode 121 is disposed in the fifth region 23a, and the fourth electrode 122 is disposed in the eighth region 23d.

[0070] like Figure 13 As shown, in a preferred embodiment, the first electrode 111 is disposed at a corner of one of the first surfaces 113 of the first battery 110, and the second electrode 112 is disposed at a corner of the other first surface 113. The first electrode 111 and the second electrode 112 are centrally symmetrical about the center point of the first battery 110. Figure 13 In this case, since the second electrode 112 is disposed on another first surface 113, therefore, in Figure 13 The second electrode 112 cannot be seen from the perspective shown, therefore, the second electrode 112 is represented by a dashed line.

[0071] like Figure 14 As shown, the third electrode 121 is disposed at the corner of one of the third surfaces 123 of the second battery 120, and the fourth electrode 122 is disposed at the corner of the other third surface 123. The third electrode 121 and the fourth electrode 122 are centrally symmetrical about the center point of the second battery 120. Figure 14 In this case, since the fourth electrode 112 is disposed on another third surface 123, therefore, in Figure 14 The fourth electrode 112 cannot be seen from the perspective shown, therefore, the fourth electrode 112 is represented by a dashed line.

[0072] In this type of embodiment, by placing the electrodes at the corners, sufficient support can be provided to the electrodes, which is beneficial for the connection and installation of the electrodes and is less likely to damage the battery.

[0073] like Figure 15 and Figure 16 As shown, in some embodiments of this disclosure, the battery assembly further includes a busbar 600, which is used to realize electrical connection between two adjacent batteries. It should be noted that the two adjacent batteries can be two adjacent first batteries 110, two adjacent second batteries 120, or two adjacent first batteries 110 and second batteries 120. The busbar 600 includes a first busbar 610 and a second busbar 620. The first busbar 610 is bent into a first segment 611 and a second segment 612, and the second busbar 620 is bent into a third segment 621 and a fourth segment 622. The first battery 110 and the second battery 120 are arranged side by side along a direction perpendicular to the first surface 113. Adjacent batteries are electrically connected through the first busbar 610 and the second busbar 620. The first segment 611 is located on one side of the first surface 113 or the third surface 123, the second segment 612 is located on the outside of a second surface 114 or a fourth surface 124, the third segment 621 is located on one side of the first surface 113 or the third surface 123, and the fourth segment 622 is located on the outside of a second surface 114 or a fourth surface 124. The first segment 611 and the third segment 621 are respectively used to connect the electrodes of two adjacent batteries, and the second segment 612 and the fourth segment 622 are connected.

[0074] In some embodiments, the second segment 612 is substantially parallel to a second surface 114 or a fourth surface 124, and the fourth segment 622 is substantially parallel to a second surface 114 or a fourth surface 124. The first busbar 610 and the second busbar 620 are substantially L-shaped. The first busbar 610 and the second busbar 620 are made of a metallic conductive material to achieve electrical connection between the first battery 110 and the second battery 120.

[0075] like Figure 15 As shown, in some embodiments, the first busbar 610 and the second busbar 620 are separate structures, and the second segment 612 and the fourth segment 622 are connected together by welding.

[0076] like Figure 16 As shown, in some other embodiments, the first busbar 610 and the second busbar 620 are integrally formed structures, and the second segment 612 and the fourth segment 622 can be merged into the same segment.

[0077] like Figure 17As shown, in some embodiments of this disclosure, the battery assembly further includes a connecting piece 700. One end of the connecting piece 700 is connected to the busbar 600 for electrical connection with the first electrode 111 of the first battery 110, and the other end of the connecting piece 700 is connected to the casing of the first battery 110 to complete the electrical connection between the first electrode 111 and the casing of the first battery 110; or one end of the connecting piece 700 is connected to the busbar 600 for electrical connection with the third electrode 121 or the fourth electrode 122 of the second battery 120, and the other end of the connecting piece 700 is connected to the casing of the second battery 120 to complete the electrical connection between the third electrode 121 or the fourth electrode 122 and the casing of the second battery 120. The connecting piece 700 is made of a conductive metallic material to achieve electrical connection between the battery casing and the corresponding electrode, so that the potential of the battery casing is equal to the potential of the corresponding electrode. In some embodiments, a fusible structure 300 is disposed on the connecting piece 700.

[0078] In some embodiments of this disclosure, an insulating element 710 is provided on the side of the connecting piece 700 away from the battery column 100. This insulating element 710 can be an insulating layer coated with insulating material on the connecting piece 700, or it can be an insulating block made of insulating material, which is fixed to the connecting piece 700 by adhesive or other means. Specifically, the insulating block can be a rubber block. In practical applications, the battery assembly can be a battery module or a battery pack. The battery module includes structures such as the battery column 100, side plates, and end plates. The side plates and end plates are used to fix the battery column 100. The battery pack includes structures such as the battery column 100 and a battery housing, where the battery housing is used to fix the battery column. Typically, the side plate or battery housing is located on the side away from the battery column 100, such as the busbar 600 and the connecting piece 700. During the shaking of the battery module or battery pack, the connecting piece 700 is prone to friction with the side plate or battery housing, which may cause insulation failure between the connecting piece 700 and the side plate or battery housing. In this embodiment, an insulating member 710 is provided on the side of the connecting piece 700 away from the battery array 100 to ensure insulation between the connecting piece 700 and the side plate or battery box, thus ensuring battery safety. Additionally, when the insulating member 710 is an insulating block, it can apply pressure to the side plate or battery box, increasing the friction between the connecting piece 700 and the side plate or battery box, improving the stability of the connecting piece 700, and preventing it from loosening during shaking of the battery module or battery pack.

[0079] In some embodiments of this disclosure, the length of the first battery 110 and the second battery 120 is 'a', where 400mm ≤ a ≤ 2500mm, the width is 'b', and the height is 'c', where 2c ≤ a ≤ 50c, and / or 0.5b ≤ c ≤ 20b. The first battery 110 and the second battery 120 are arranged side-by-side along the width direction to form a battery array 100, and the voltage acquisition component 200 is disposed on one side of the battery array 100 along its length direction.

[0080] Furthermore, 50mm≤c≤200mm, 10mm≤b≤100mm.

[0081] Preferably, 4c≤a≤25c, and / or 2b≤c≤10b.

[0082] In the above embodiments, the battery has a large ratio of length to height while ensuring sufficient energy density, and further, the battery has a large ratio of height to width.

[0083] In one embodiment, the length of the first battery 110 and the height of the second battery 120 are a and c, respectively, where 4c≤a≤7c. That is, the ratio of the battery length to the height in this embodiment is relatively large, thereby increasing the energy density of the battery and facilitating the subsequent formation of the battery module.

[0084] In one embodiment, the width of the first battery 110 and the second battery 120 is b, where 3b≤c≤7b. The ratio of battery height to width is relatively large, which facilitates formation while ensuring sufficient energy density.

[0085] Optionally, the length of the first battery 110 and the second battery 120 can be 500mm-1500mm, the height can be 80mm-150mm, and the width can be 15mm-25mm.

[0086] like Figure 1 and Figure 18 As shown, the voltage acquisition component 200 includes a flexible printed circuit board (FPC) and a low-voltage connector. A first acquisition terminal 210 and a second acquisition terminal 220 are disposed on the flexible printed circuit board. The first acquisition terminal 210 and the second acquisition terminal 220 are connected to the housing or corresponding electrode via a metal conductive element to acquire the potential of the housing or corresponding electrode. The flexible printed circuit board extends from one side of the plurality of battery cells 100 toward the ends of the plurality of battery cells 100, and the extended end is connected to the low-voltage connector. In some embodiments, for the first acquisition terminal 210, the potential of the housing can be acquired directly through the aforementioned connecting piece 700, without the need for additional metal conductive elements. The second acquisition terminal 220 is connected to the busbar 600 via a metal conductive element to acquire the potential of the second electrode 112 or the fourth electrode.

[0087] like Figure 1 and Figure 19 As shown, in some embodiments of this disclosure, the battery assembly further includes a mounting bracket for fixing the voltage acquisition component 200. The mounting bracket includes a first mounting bracket 810 and a second mounting bracket 820, which are located at opposite ends of the battery arrangement direction of the battery array 100. The voltage acquisition component 200 includes a first voltage acquisition component 230 and a second voltage acquisition component 240. The first voltage acquisition component 230 includes a first flexible circuit board 231 and a first low-voltage connector 232. The first flexible circuit board 231 is bonded to the busbar 600 and extends toward the first mounting bracket 810. The extended end of the first flexible circuit board 231 is connected to the first low-voltage connector 232, which is fixed to the first mounting bracket 810.

[0088] The second voltage acquisition component 240 includes a second flexible circuit board 241 and a second low-voltage connector 242. The second flexible circuit board 241 is arranged side by side along the arrangement direction of the first battery 110 and the second battery 120. The second flexible circuit board 241 is bonded to the busbar 600 and extends toward the second fixing frame 820. The extended end of the second flexible circuit board 241 is connected to the second low-voltage connector 242, and the second low-voltage connector 242 is fixed to the second fixing frame 820.

[0089] In practical applications, the longer the flexible circuit board in the voltage acquisition component 200, the more difficult its molding process and the higher its price. This disclosure uses a first voltage acquisition component 230 and a second voltage acquisition component 240 to acquire voltage from the battery pack 100 in segments, which shortens the length of the flexible circuit board in the voltage acquisition component 200, reduces the manufacturing cost of the flexible circuit board, and improves the voltage acquisition efficiency.

[0090] In some embodiments, the first fixing frame 810 and the second fixing frame 820 can be two end plates in the battery module, with the two end plates located at opposite ends of the battery arrangement direction of the battery column 100. In other embodiments, the first fixing frame 810 and the second fixing frame 820 can be battery housings in the battery pack, specifically crossbeams or longitudinal beams located at opposite ends of the battery arrangement direction of the battery column 100 within the battery housing.

[0091] This disclosure also provides a battery pack including the battery assembly of any of the above embodiments.

[0092] This disclosure also provides a vehicle including the aforementioned battery pack.

[0093] It should be understood that this disclosure is not limited to the detailed structure and arrangement of the components presented in this specification. This disclosure is capable of other embodiments and can be implemented and performed in various ways. The foregoing variations and modifications fall within the scope of this disclosure. It should be understood that this disclosure, as disclosed and defined in this specification, extends to all alternative combinations of two or more individual features mentioned or apparent in the text and / or drawings. All these different combinations constitute multiple alternative aspects of this disclosure. The embodiments described in this specification illustrate the best known mode for implementing this disclosure and will enable those skilled in the art to utilize this disclosure.

Claims

1. A battery assembly, characterized in that, include: Battery array and voltage acquisition component disposed on one side of the battery array; The battery bank includes, At least one first battery, the length of the first battery being 'a', 400mm≤a≤2500mm, the first battery including a first electrode and a second electrode, the distance between the first electrode and the voltage acquisition component being greater than the distance between the second electrode and the voltage acquisition component, the first electrode of the first battery being electrically connected to the casing of the first battery to make the potentials of the first electrode and the casing of the first battery equal, a fusible structure connecting the first electrode of the first battery and the casing of the first battery, the first battery also including a first battery body, the first battery body including two opposing first surfaces and four second surfaces arranged around the first surfaces, the area of ​​the first surface being greater than the area of ​​the second surfaces, the first electrode and the second electrode being disposed on the first surface, wherein the first surface is equally divided along a first direction into a first region, a second region, a third region and a fourth region arranged sequentially, the distance between the first region and the voltage acquisition component being greater than the distance between the fourth region and the voltage acquisition component, the first direction being parallel to the long side of the first surface, the first electrode being disposed in the first region, and the second electrode being disposed in the fourth region; The voltage acquisition component includes, The first acquisition end is connected to the casing of the first battery and is used to acquire the potential of the first electrode through the casing of the first battery. The second acquisition terminal is connected to the second electrode and is used to acquire the potential of the second electrode.

2. The battery assembly according to claim 1, characterized in that, The battery bank also includes: At least one second battery is electrically connected to the first battery. The second battery includes a third electrode and a fourth electrode, and the distance between the third electrode and the voltage acquisition component is greater than the distance between the fourth electrode and the voltage acquisition component. The second acquisition terminal may be connected to the fourth electrode to acquire the potential of the fourth electrode.

3. The battery assembly according to claim 2, characterized in that, The third or fourth electrode of the second battery is electrically connected to the casing of the second battery.

4. The battery assembly according to claim 2 or 3, characterized in that, The casing of the first battery and / or the second battery is an aluminum casing made of aluminum material, and the corresponding electrode connected to the aluminum casing is the positive electrode.

5. The battery assembly according to claim 2 or 3, characterized in that, The casing of the first battery and / or the second battery is an iron casing or a copper casing formed of iron-based material or copper-based material, and the corresponding electrode connected to the iron casing or the copper casing is the negative electrode.

6. The battery assembly according to claim 2 or 3, characterized in that, When the third electrode of the second battery is electrically connected to the casing of the second battery, a fusible structure is provided between the third electrode of the second battery and the casing of the second battery. When the fourth electrode of the second battery is electrically connected to the casing of the second battery, a fusible structure is provided between the fourth electrode of the second battery and the casing of the second battery.

7. The battery assembly according to claim 6, characterized in that, A resistor is connected between the terminal of the first electrode of the first battery and the casing of the first battery; When the third electrode of the second battery is electrically connected to the casing of the second battery, a resistor is connected between the terminal of the third electrode of the second battery and the casing of the second battery. When the fourth electrode of the second battery is electrically connected to the casing of the second battery, a resistor is connected between the terminal of the fourth electrode of the second battery and the casing of the second battery.

8. The battery assembly according to claim 6, characterized in that, An insulating pad is also connected between the first electrode post of the first battery and the casing of the first battery. When the third electrode of the second battery is electrically connected to the casing of the second battery, an insulating pad is connected between the terminal of the third electrode of the second battery and the casing of the second battery. When the fourth electrode of the second battery is electrically connected to the casing of the second battery, an insulating pad is also connected between the terminal of the fourth electrode of the second battery and the casing of the second battery.

9. The battery assembly according to claim 2, characterized in that, The second battery also includes a second battery body, which includes two opposing third surfaces and four fourth surfaces surrounding the third surfaces. The area of ​​the third surfaces is larger than the area of ​​the fourth surfaces, and the third electrode and the fourth electrode are disposed on the third surfaces. The third surface is divided into a fifth region, a sixth region, a seventh region, and an eighth region in sequence along the second direction. The distance between the fifth region and the voltage acquisition component is greater than the distance between the eighth region and the voltage acquisition component. The second direction is parallel to the long side of the third surface. The third electrode is disposed in the fifth region, and the fourth electrode is disposed in the eighth region.

10. The battery assembly according to claim 9, characterized in that, The first electrode is disposed at one corner of the first surface of the first battery, and the second electrode is disposed at the other corner of the first surface. The first electrode and the second electrode are centrally symmetrical about the center point of the first battery. The third electrode is disposed at one corner of the third surface of the second battery, and the fourth electrode is disposed at the other corner of the third surface. The third electrode and the fourth electrode are centrally symmetrical about the center point of the second battery.

11. The battery assembly according to claim 9, characterized in that, The battery assembly also includes: The busbar includes a first busbar and a second busbar, wherein the first busbar is bent into a first segment and a second segment, and the second busbar is bent into a third segment and a fourth segment; The first battery and the second battery are arranged side by side along a direction perpendicular to the first surface. Adjacent batteries are electrically connected through the first busbar and the second busbar. The first segment is located on one side of the first surface or the third surface, the second segment is located on the outside of one of the second surface or the fourth surface, the third segment is located on one side of the first surface or the third surface, and the fourth segment is located on the outside of one of the second surface or the fourth surface. The first segment and the third segment are respectively used to connect the electrodes of two adjacent batteries, and the second segment and the fourth segment are connected.

12. The battery assembly according to claim 11, characterized in that, The battery assembly also includes: A connecting piece, one end of which is connected to the busbar for electrical connection to the first electrode of the first battery, and the other end of which is connected to the casing of the first battery to complete the electrical connection between the first electrode of the first battery and the casing of the first battery; or One end of the connecting piece is connected to the busbar to electrically connect to the third or fourth electrode of the second battery, and the other end of the connecting piece is connected to the casing of the second battery to complete the electrical connection between the third or fourth electrode of the second battery and the casing of the second battery.

13. The battery assembly according to claim 12, characterized in that, An insulating element is provided on the side of the connecting piece away from the battery array.

14. The battery assembly according to claim 2, characterized in that, The length of the second battery is a, the width of the first battery and the second battery is b, the height of the first battery and the second battery is c, 2c≤a≤50c, and / or, 0.5b≤c≤20b; The first battery and the second battery are arranged side by side along the width direction to form the battery column, and the voltage acquisition component is located on one side of the first battery and the second battery along the length direction.

15. The battery assembly according to claim 11, characterized in that, The battery assembly also includes: The fixing frame includes a first fixing frame and a second fixing frame, which are respectively located at both ends of the battery arrangement direction of the battery column; The voltage acquisition component includes a first voltage acquisition component and a second voltage acquisition component; The first voltage acquisition component includes a first flexible circuit board and a first low-voltage connector. The first flexible circuit board is bonded to the busbar and extends toward the first fixing frame. The extended end of the first flexible circuit board is connected to the first low-voltage connector, and the first low-voltage connector is fixed to the first fixing frame. The second voltage acquisition component includes a second flexible circuit board and a second low-voltage connector; the second flexible circuit board is arranged side by side along the arrangement direction of the first battery and the second battery, the second flexible circuit board is bonded to the busbar and extends toward the second fixing frame, the extended end of the second flexible circuit board is connected to the second low-voltage connector, and the second low-voltage connector is fixed to the second fixing frame.

16. A battery pack, characterized in that, Includes the battery assembly as described in any one of claims 1-15.

17. A vehicle, characterized in that, Includes the battery pack as described in claim 16.

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