Battery controller and battery

Abstract

The present invention provides a battery controller and a battery. The battery includes the battery controller. The battery controller includes a circuit board, a negative electrode end cap and an inner electrode. The circuit board includes a first surface and a second surface arranged opposite to each other, and circuit components are arranged on the first surface and the second surface. The negative electrode end cap is made of a metal conductive material, which is electrically connected to the circuit board. The negative electrode end cap includes a negative electrode end cap plate and a cap wall arranged around the negative electrode end cap plate. The negative electrode end cap plate and the cap wall constitute a cap body with a bottom opening. The cap body is inverted on the first surface of the circuit board. The cap body is in close contact with the circuit board in the circumference, and some or all of the circuit components on the first surface are encapsulated in the inner cavity of the cap body. The inner electrode is made of a conductive metal material and is fixed to the second surface of the circuit board. The inner electrode is electrically connected to the circuit board, and a space for arranging circuit components is formed between the inner electrode and the circuit board.

Description

Technical Field

[0001] The present invention relates to the technical field of secondary batteries, and in particular to a battery controller and a battery. Background Art

[0002] Cylindrical primary batteries standardized in GB / T 8897.2 (IEC 60086-2) have been widely used in handheld or portable electronic and electrical products. Since primary batteries cannot be reused and have problems such as high battery cost and environmental pollution caused by discarded batteries, the consumer market has an increasing demand for secondary battery products that can replace primary batteries standardized in GB / T 8897.2 (IEC 60086-2).

[0003] In the field of rechargeable battery products that are compatible with the standardized primary batteries of GB / T 8897.2 (IEC 60086-2), nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries and other products have been born one after another. However, these rechargeable battery products have technical problems that cannot satisfy consumers in terms of discharge voltage compatibility, memory effect, charging rate, abuse tolerance, cycle life and other aspects.

[0004] Lithium-ion batteries are much better than nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries and other secondary batteries in terms of specific energy, charge and discharge memory effect, charge rate, abuse tolerance, cycle life, etc., and have gradually replaced other secondary batteries in consumer products such as electronic power supplies, energy storage power supplies, and power supplies. However, the discharge voltage of lithium-ion batteries is not compatible with the primary battery nominal voltage defined in the GB / T 8897.2 (IEC 60086-2) standard, and must be charged and discharged under the control of the charge and discharge control management circuit. It cannot directly replace nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries and other secondary batteries in this field.

[0005] With the rapid development of lithium-ion battery charge and discharge control technology, the charge and discharge control circuit, the DC-DC energy conversion circuit and the lithium-ion battery are packaged as one, the charge and discharge control circuit controls the charge and discharge of the lithium-ion battery, and the DC-DC energy conversion circuit converts the lithium-ion battery voltage into the required voltage for regulated discharge, thereby forming a rechargeable battery compatible with the primary battery standardized in GB / T 8897.2 (IEC 60086-2). The battery is superior to the existing pure electrochemical rechargeable batteries in terms of nominal voltage compatibility, discharge voltage stability, charging rate, weight and volume specific energy, charge and discharge memory effect, abuse protection and tolerance, cycle life, etc., and can replace other electrochemical rechargeable batteries in the field of rechargeable battery products compatible with the primary battery standardized in GB / T 8897.2 (IEC 60086-2).

[0006] In the currently known rechargeable and / or dischargeable battery technology solutions that integrate the charge and discharge control circuit, DC-DC energy conversion circuit, and lithium-ion battery into one package to form a nominal voltage and structural dimensions compatible with the standardized primary battery of GB / T 8897.2 (IEC 60086-2), the controller is large in size and the available space for the lithium-ion battery is small, resulting in reduced battery power and reduced battery performance. Summary of the invention

[0007] The purpose of the present disclosure is to provide a battery controller that is compact in structure and small in size and can be charged and / or discharged, and a battery having the battery controller, which can improve the absolute storage energy and volume specific energy of the rechargeable battery.

[0008] According to a first aspect of the present disclosure, a battery controller is provided, the battery controller comprising:

[0009] A circuit board, comprising a first surface and a second surface arranged opposite to each other, wherein the first surface and the second surface are both provided with circuit components;

[0010] A negative electrode end cap is made of a metal conductive material and is electrically connected to the circuit board. The negative electrode end cap includes a negative electrode end cap plate and a cap wall surrounding the negative electrode end cap plate. The negative electrode end cap plate and the cap wall constitute a cap body with a bottom opening. The cap body is inverted on the first surface of the circuit board. The cap body is in close contact with the circuit board in the circumference, and some or all of the circuit components on the first surface are encapsulated in the inner cavity of the cap body; and

[0011] The inner electrode is made of a conductive metal material and is fixed to the second surface of the circuit board. The inner electrode is electrically connected to the circuit board, and an accommodation space for arranging circuit components is formed between the inner electrode and the circuit board.

[0012] According to a second aspect of the present disclosure, a battery is provided, which includes: a cylindrical battery outer shell, a lithium-ion battery cell installed in the battery outer shell, and a positive electrode cap arranged at one end of the battery outer shell, the battery also includes the above-mentioned battery controller, the battery controller also includes a controller outer shell, the circuit board is located in the controller outer shell, the battery controller is installed at the other end of the battery outer shell opposite to the positive electrode cap, the battery outer shell is connected to the controller shell of the battery controller, the internal electrode of the battery controller is connected to the negative electrode of the lithium-ion battery cell, and the positive electrode of the lithium-ion battery cell is electrically connected to the positive electrode cap.

[0013] According to a third aspect of the present disclosure, a soft-pack lithium-ion battery is provided, the soft-pack lithium-ion battery comprising:

[0014] A cylindrical battery shell, a soft-pack lithium-ion battery cell installed in the battery shell, and a positive electrode cap arranged at one end of the battery shell, wherein the positive electrode cap is electrically connected to the positive electrode of the soft-pack lithium-ion battery cell, the soft-pack lithium-ion battery also includes the above-mentioned battery controller, the battery controller also includes a controller shell, the circuit board is located in the controller shell, and the battery controller is installed at the other end of the battery shell opposite to the positive electrode cap;

[0015] The soft-pack lithium-ion battery cell is filled with electrolyte and has an insulating film sealed on the surface. The opposite ends of the soft-pack lithium-ion battery cell respectively have a positive electrode and a negative electrode exposed outside the battery cell package. The positive electrode of the soft-pack ion battery cell is bent toward one end of the negative electrode and extended to the open end of the battery shell, and is welded and fixed to the battery shell at the open end to establish an electrical connection. The battery shell is connected to the controller shell, and the inner electrode of the battery controller is connected to the negative electrode of the soft-pack lithium-ion battery cell.

[0016] According to a fourth aspect of the present disclosure, there is provided an aluminum shell lithium ion battery, the aluminum shell lithium ion battery comprising:

[0017] A cylindrical battery shell, an aluminum shell lithium ion battery cell installed in the battery shell, and a positive electrode cap connected to one end of the battery shell, wherein the positive electrode cap is electrically connected to the positive electrode of the aluminum shell lithium ion battery cell, the aluminum shell lithium ion battery also includes the above-mentioned battery controller, the battery controller also includes a controller shell, the circuit board is located in the controller shell, and the battery controller is installed at the other end of the battery shell opposite to the positive electrode cap;

[0018] The aluminum shell lithium ion battery cell comprises a battery cap and an aluminum shell lithium ion battery core, the aluminum shell lithium ion battery core is sleeved in the battery shell, the battery shell is filled with electrolyte, the battery cap is arranged at the open end of the battery shell and closes the opening of the battery shell, the battery controller is sleeved with the battery cap, the battery cap comprises a circular battery cap shell in the shape of a flat bottom cover and a lead-out electrode of a conductive material riveted on the battery cap shell, the battery cap shell comprises a circular cover The lead electrode is riveted at the center of the cover bottom and passes through the cover bottom, the battery outer shell is made of aluminum, the cover bottom of the battery cell cap shell is made of insulating material, the cover edge is made of conductive material, the cover edge connects the battery outer shell and the controller outer shell, the lead electrode is exposed on one side of the battery cell cap shell and is electrically connected to the negative electrode of the aluminum shell lithium ion battery cell roll core, and the lead electrode is located on one side inside the battery cell cap shell and contacts and is electrically connected to the internal electrode of the battery controller.

[0019] According to a fifth aspect of the present disclosure, a direct-sealed lithium-ion battery is provided, the direct-sealed lithium-ion battery comprising:

[0020] A cylindrical battery shell, a directly sealed lithium-ion battery cell installed in the battery shell, and a positive electrode cap arranged at one end of the battery shell, wherein the positive electrode cap is electrically connected to the positive electrode of the directly sealed lithium-ion battery cell, the directly sealed lithium-ion battery further comprises the above-mentioned battery controller, the battery controller further comprises a controller shell, the circuit board is located in the controller shell, the battery controller is installed at the other end of the battery shell opposite to the positive electrode cap, the controller shell is connected to the battery shell, and the inner electrode of the battery controller is connected to the negative electrode of the directly sealed lithium-ion battery cell;

[0021] The battery controller is arranged at the open end of the battery outer shell and directly closes the opening of the battery outer shell. The circuit board bracket in the controller outer shell is made of nickel-plated metal aluminum. The controller outer shell and the battery outer shell are both formed of metal aluminum. The circuit board is welded to the annular top surface of the circuit board bracket facing the negative electrode end cover. The inner electrode on the second surface of the circuit board protrudes from the through hole of the circuit board bracket and the through hole of the controller outer shell to be connected to the negative electrode of the direct-sealed lithium-ion battery cell.

[0022] The embodiments of the present disclosure have the following technical effects:

[0023] The first surface of the circuit board of the battery controller disclosed in the present invention is provided with a negative electrode end cap, and the second surface is provided with an inner electrode, and the cap body of the negative electrode end cap is in close contact with the circuit board in the circumference, and some or all of the circuit components on the first surface are encapsulated in the inner cavity of the cap body, which can play a role in electromagnetic shielding for the components inside the cap body and the circuits connected to the components, reduce the interference of electromagnetic waves, and improve the accuracy of circuit control. The cap body covers the components inside, and the circuit board does not need to leave additional space for installing these components. Similarly, an accommodation space for arranging circuit components is also formed between the inner electrode of the battery controller and the circuit board. In this way, the space occupied by the components on the circuit board can be greatly saved, and the arrangement of the components on the circuit board is more compact, which is conducive to the miniaturization of the battery controller and reduces the volume of the battery controller.

[0024] The battery disclosed in the present invention reduces the interference of electromagnetic waves by adopting the battery controller, makes the charging and / or discharging control more accurate, and also reduces the battery space occupied by the controller, thereby increasing the volume of the lithium-ion battery cell, thereby increasing the battery storage capacity. In addition, the controller housing of the battery disclosed in the present invention is electrically connected to the battery housing, and is electrically connected to the positive electrode through the battery housing, so that the battery housing is used as the positive electrode structure of the battery, which simplifies the battery structure and reduces the structural material and process costs of the battery.

[0025] The soft-pack lithium-ion battery disclosed in the present invention reduces the interference of electromagnetic waves by adopting the above-mentioned battery controller, and the charging and / or discharging control is more accurate, and the battery space occupied by the controller is also reduced, thereby increasing the volume of the lithium-ion battery cell, thereby increasing the battery storage capacity. In addition, the controller housing of the battery disclosed in the present invention is electrically connected to the battery housing, and the positive electrode is electrically connected through the battery housing, and the battery housing is used as the positive electrode structure of the battery, which simplifies the battery structure and reduces the structural material and process costs of the battery.

[0026] The aluminum shell lithium ion battery disclosed in the present invention reduces the interference of electromagnetic waves by adopting the above-mentioned battery controller, and the charging and / or discharging control is more accurate, and the battery space occupied by the controller is also reduced, thereby increasing the volume of the lithium ion battery cell, thereby increasing the battery storage capacity. In addition, the controller housing of the battery disclosed in the present invention is electrically connected to the battery housing, and the positive electrode is electrically connected through the battery housing, and the battery housing is used as the positive electrode structure of the battery, which simplifies the battery structure and reduces the structural material and process costs of the battery.

[0027] The direct-sealed lithium-ion battery disclosed in the present invention reduces the interference of electromagnetic waves by adopting the above-mentioned battery controller, makes the charging and / or discharging control more precise, and also reduces the battery space occupied by the controller, thereby increasing the volume of the lithium-ion battery cell, thereby increasing the battery storage capacity. In addition, the controller housing of the battery disclosed in the present invention is electrically connected to the battery housing, and is electrically connected to the positive electrode through the battery housing, so that the battery housing is used as the positive electrode structure of the battery, which simplifies the battery structure and reduces the structural material and process costs of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the appearance of one end of the positive electrode of the rechargeable battery of Example 1;

[0029] Figure 2 The figure is a schematic diagram of the appearance of one end of the negative electrode of the rechargeable battery of Example 1;

[0030] Figure 3 is a schematic cross-sectional structural diagram of a rechargeable battery of Example 1;

[0031] Figure 4It is a schematic diagram of the exploded structure of the rechargeable battery of Example 1;

[0032] Figure 5 It is a schematic structural diagram of the welded extension of the positive electrode of the soft-pack lithium-ion battery cell of the rechargeable battery of Example 1;

[0033] Figure 6 It is a schematic structural diagram of the bent positive and negative electrodes of the soft-pack lithium-ion battery cell of the rechargeable battery of Example 1;

[0034] Figure 7 It is a schematic diagram of the structure of the soft-pack lithium-ion battery cell casing of the rechargeable battery of Example 1 and the welding of the positive electrode and the battery outer shell;

[0035] Figure 8 It is a schematic diagram of the welding structure of the negative electrode of the soft-pack lithium-ion battery cell of the rechargeable battery of Example 1 and the electrode inside the controller;

[0036] Fig. 9 This is a schematic diagram of the appearance of one end of the positive electrode of the rechargeable battery in Example 2;

[0037] Fig.10 A schematic diagram of the appearance of one end of the negative electrode of a rechargeable battery in Example 2;

[0038] Fig.11 is a schematic cross-sectional view of the rechargeable battery of Example 2;

[0039] Fig.12 It is a schematic diagram of the exploded structure of the rechargeable battery of Example 2;

[0040] Fig.13 This is a schematic cross-sectional structure diagram of an aluminum shell lithium-ion battery cell of a rechargeable battery of Example 2;

[0041] Fig.14 This is a schematic diagram of the exploded structure of the aluminum shell lithium ion battery cell of the rechargeable battery of Example 2;

[0042] Fig.15 It is a schematic diagram of the decomposition of the aluminum shell lithium ion battery core and the insulating layer of the rechargeable battery of Example 2;

[0043] Fig.16 It is an exploded schematic diagram of the controller and the insulating layer of the rechargeable battery of Example 2;

[0044] Fig.17 It is a schematic structural diagram of welding the inner electrode of the rechargeable battery of Example 2 to the negative electrode of the aluminum shell lithium ion battery cell;

[0045] Fig.18 This is a schematic diagram of the appearance of one end of the positive electrode of the rechargeable battery of Example 3;

[0046] Fig.19This is a schematic diagram of the appearance of one end of the negative electrode of the rechargeable battery of Example 3;

[0047] Fig. 20 is a schematic cross-sectional view of the internal structure of a rechargeable battery of Example 3;

[0048] Fig.21 It is a schematic diagram of the exploded structure of the rechargeable battery of Example 3;

[0049] Fig. 22 It is a schematic diagram of welding the negative electrode of the direct-sealed lithium-ion battery cell of the rechargeable battery of Example 3 to the inner electrode of the controller;

[0050] Fig.23 A schematic diagram of the cell test points for formation and detection of a rechargeable battery in Example 3;

[0051] Fig.24 It is a schematic structural diagram of the first surface of the circuit board of the rechargeable battery of Example 1;

[0052] Fig.25 It is a schematic structural diagram of the second surface of the circuit board of the rechargeable battery of Example 1;

[0053] Fig.26 A schematic structural diagram of welding the inner electrode and the circuit board of the controller of the rechargeable battery of Example 1;

[0054] Fig. 27 This is a schematic structural diagram of the internal electrode and the circuit board of the rechargeable battery controller of Example 1 after welding;

[0055] Fig.28 A schematic structural diagram of welding the negative electrode end cap and the circuit board of the controller of the rechargeable battery of Example 1;

[0056] Fig.29 This is a schematic structural diagram of the negative electrode end cap and the circuit board of the rechargeable battery controller of Example 1 after welding is completed;

[0057] Fig.30 It is a structural schematic diagram of assembling a control circuit component of a rechargeable battery controller and a controller outer shell of Example 1;

[0058] Fig.31 A cross-sectional view of a controller housing after the control circuit assembly of the controller of the rechargeable battery of Example 1 and the controller housing are assembled;

[0059] Fig.32 It is a schematic diagram of the thermal conductive glue injection hole and the exhaust overflow hole of the controller of the rechargeable battery in Example 1;

[0060] Fig.33This is a schematic diagram of the structure of the controller of the rechargeable battery in Example 1 after the thermal conductive glue is poured;

[0061] Fig.34 A schematic structural diagram of the assembly of a controller cover plate and a controller of a rechargeable battery controller of Example 1;

[0062] Fig.35 It is a cross-sectional schematic diagram of the controller of the rechargeable battery of Example 1 after being assembled;

[0063] Fig.36 It is a schematic diagram of the assembly and decomposition of the controller of the rechargeable battery of Example 1;

[0064] Fig.37 A schematic structural diagram of welding the inner electrode and the circuit board of the controller of the rechargeable battery of Example 2;

[0065] Fig.38 This is a schematic structural diagram of the internal electrodes and the circuit board of the rechargeable battery controller of Example 2 after welding is completed;

[0066] Fig.39 A schematic structural diagram of welding the negative electrode end cap and the circuit board of the controller of the rechargeable battery of Example 2;

[0067] Fig.40 This is a schematic structural diagram of the negative electrode end cap and the circuit board of the rechargeable battery controller of Example 2 after welding is completed;

[0068] Fig.41 A schematic structural diagram of welding a control circuit component of a rechargeable battery controller and a controller housing component of Example 2;

[0069] Fig.42 It is a cross-sectional view of the control circuit component and the controller outer shell component of the rechargeable battery controller of Example 2 after welding is completed;

[0070] Fig.43 It is a schematic diagram of the thermal conductive glue injection hole and the exhaust overflow hole of the controller of the rechargeable battery of Example 2;

[0071] Fig.44 This is a schematic diagram of the structure of the rechargeable battery controller of Example 2 after the thermal conductive glue is poured;

[0072] Fig.45 A schematic structural diagram of another inner electrode of the controller of the rechargeable battery of Example 2;

[0073] Fig.46 A schematic structural diagram of the assembly of a controller cover plate and a controller of a rechargeable battery controller according to Example 2;

[0074] Fig.47 A cross-sectional view of the controller of the rechargeable battery of Example 2 after being assembled;

[0075] Fig.48 It is an assembly exploded view of the controller of the rechargeable battery of Example 2;

[0076] Fig.49 A schematic diagram of welding the inner electrode of the controller of the rechargeable battery of Example 3 to the circuit board;

[0077] Fig.50 This is a schematic structural diagram of the internal electrodes and the circuit board of the controller of the rechargeable battery of Example 3 after welding is completed;

[0078] Fig.51 A schematic structural diagram of welding and assembling the negative electrode end cap and the circuit board of the controller of the rechargeable battery of Example 3;

[0079] Fig.52 This is a schematic structural diagram of the negative electrode end cap and the circuit board of the rechargeable battery controller of Example 3 after welding is completed;

[0080] Fig.53 A schematic diagram of welding a controller housing assembly of a rechargeable battery controller according to Example 3;

[0081] Fig.54 A cross-sectional view of a controller housing assembly of a rechargeable battery controller of Example 3;

[0082] Fig.55 A schematic structural diagram of welding a control circuit component of a rechargeable battery controller and a controller housing component of Example 3;

[0083] Fig.56 It is a cross-sectional view of the control circuit component and the controller outer shell component of the rechargeable battery controller of Example 3 after welding is completed;

[0084] Fig.57 It is a schematic diagram of the thermal conductive glue injection hole and the exhaust overflow hole of the controller of the rechargeable battery of Example 3;

[0085] Fig.58 This is a schematic diagram of the structure of the controller of the rechargeable battery in Example 3 after the thermal conductive glue is poured;

[0086] Fig.59 This is a schematic diagram of the structure of the controller of the rechargeable battery in Example 3 after the sealant is injected;

[0087] Fig.60 A schematic diagram of assembling a controller cover plate and a cover plate light shielding ring of a rechargeable battery controller of Example 3;

[0088] Fig.61 A cross-sectional schematic diagram of the controller of the rechargeable battery of Example 3 after welding is completed; and

[0089] Fig.62 This is a schematic diagram of the controller assembly explosion of the rechargeable battery of Example 3. DETAILED DESCRIPTION

[0090] Although the present invention can be easily embodied in different forms of embodiments, only some of the specific embodiments are shown in the drawings and will be described in detail in this specification. It should be understood that this description should be regarded as an exemplary illustration of the principles of the present disclosure and is not intended to limit the present invention to that described herein.

[0091] Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the present disclosure, rather than implying that each embodiment of the present invention must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0092] In the embodiments shown in the drawings, the directions (such as up, down, left, right, front and back) used to explain the structure and movement of various components of the present invention are not absolute but relative. These descriptions are appropriate when these components are in the positions shown in the drawings. If the description of the positions of these components changes, the directions also change accordingly.

[0093] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that the description of the present disclosure will be more comprehensive and complete and the concepts of the example embodiments will be fully conveyed to those skilled in the art. The accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0094] The preferred embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings of this specification.

[0095] This application takes the implementation method of three rechargeable batteries as an example to provide the structure of the integrated system of rechargeable batteries.

[0096] Implementation 1: Implementation of a soft-pack lithium-ion battery (i.e., a soft-pack lithium-ion cell rechargeable battery)

[0097] Taking the rechargeable battery 100a composed of soft-pack lithium-ion cells as an example, the structural features of the battery disclosed in the present invention are explained. This embodiment is applicable to rechargeable batteries of different types composed of soft-pack lithium-ion cells, such as No. 5 battery, No. 7 battery, No. 3 battery, etc.

[0098] like Figure 1 and Figure 2 As shown, the rechargeable battery 100a includes a soft-pack lithium-ion battery cell 200a and a controller 400a (i.e., a battery controller) for controlling charging and / or discharging. The internal structure of the rechargeable battery 100a is shown in FIG. Figure 3 As shown, the structural assembly relationship is as follows Figure 4 shown.

[0099] Specifically, the rechargeable battery 100a (i.e., a soft-pack lithium-ion battery) includes a cylindrical battery housing 110a, a lithium-ion battery cell 200a installed in the battery housing 110a, a positive electrode cap disposed at one end of the battery housing 110a, and a controller 400a (i.e., a battery controller) disposed at the other end of the battery housing opposite to the positive electrode cap. The positive electrode cap is a closed end boss 112a formed at one end of the battery housing 110a.

[0100] The soft-pack lithium-ion battery cell 200a is filled with electrolyte and sealed with an insulating film on the surface. The opposite ends of the soft-pack lithium-ion battery cell 200a respectively have a positive electrode 210a and a negative electrode 220b exposed outside the battery cell package. The positive electrode of the soft-pack lithium-ion battery cell 200a is bent toward one end of the negative electrode and extended to the open end of the battery outer shell 110a, and is welded and fixed to the battery outer shell 110a at the open end to establish an electrical connection.

[0101] like Figure 5 As shown, the rechargeable battery 100a uses a soft-pack lithium-ion battery cell 200a that has been formed and tested. The material of the positive electrode 210a of the soft-pack lithium-ion battery cell 200a is metal aluminum or aluminum-nickel or aluminum-nickel composite, and the material of the negative electrode 220a of the soft-pack lithium-ion battery cell 200a is metal nickel.

[0102] like Figure 6 As shown, the positive electrode 210a is attached to the soft-pack lithium-ion battery cell 200a and bent toward the negative electrode direction of the soft-pack lithium-ion battery cell 200a. The positive electrode 210a is extended to the end where the negative electrode 220a of the soft-pack lithium-ion battery cell 200a is located after bending. The negative electrode 220a of the soft-pack lithium-ion battery cell 200a is bent toward the negative electrode end surface of the soft-pack lithium-ion battery cell 200a. The positive electrode 210a includes an original part directly extended from the soft-pack lithium-ion battery cell 200a and an extension part. The extension part is made of a metal sheet made of the same material as the original part by stamping, and is welded to the original part by ultrasonic welding, resistance welding or laser welding.

[0103] The closed end boss 112a is integrally formed with the battery outer shell 110a. The closed end boss 112a can be directly used as a positive electrode cap to serve as a positive electrode for charging input and discharging output of the rechargeable battery 100a. The controller 400a is installed at the other end of the battery outer shell 110a relative to the closed end boss 112a. The controller outer shell 410a of the controller 400a is electrically connected to the battery outer shell 110a, and the inner electrode 340a of the controller 400a is electrically connected to the negative electrode 220a of the soft-pack lithium-ion battery cell. The negative electrode end cap 330a serves as a negative electrode for charging input and discharging output of the rechargeable battery 100a.

[0104] In order to enhance the structural strength and oxidation resistance of the positive electrode of the rechargeable battery 100b, a positive electrode cap may be sleeved on the closed end boss 112a. The positive electrode cap may be made of stainless steel or other conductive metal materials such as nickel-plated iron, and its shape matches the closed end boss 112a, and is electrically connected to the positive electrode 210a of the soft-pack lithium-ion battery cell. It is understandable that if the battery housing 110a integrally formed with the closed end boss 112a is made of materials such as stainless steel or nickel-plated iron, there is no need to sleeve a positive electrode cap on the closed end boss 112a, and the closed end boss 112a can be directly used as the positive electrode cap.

[0105] The battery outer shell 110a can be made of stainless steel or aluminum, and the battery outer shell 110a and the positive electrode 210a can be welded by resistance welding or laser welding.

[0106] The battery outer shell 110a may also be made of a nickel-plated metal material, such as nickel-plated stainless steel, nickel-plated iron or nickel-plated aluminum.

[0107] like Figure 7 As shown, the soft-pack lithium-ion battery cell 200a is loaded into the battery outer shell 110a with the positive electrode 210a facing the closed end of the battery outer shell 110a, and then the positive electrode 210a is welded to the battery outer shell 110a.

[0108] Further, if Figure 3 , Figure 4 , Figure 8 As shown, a housing positioning ring 475a is fixedly mounted on the axial bottom surface of the controller housing 410a of the controller 400a facing the soft-pack lithium-ion battery cell 200a. The housing positioning ring 475a can be made of high-temperature resistant insulating material, and can be bonded to the controller housing 410a by a colloid such as a self-adhesive adhesive. The housing positioning ring 475a and the controller housing 410a are concentrically positioned and assembled.

[0109] The outer diameter of the housing positioning ring 475a is smaller than the outer diameter of the bottom surface of the controller housing 410a of the controller 400a, so that after the housing positioning ring 475a is installed at the axial bottom of the controller 400a, a Figure 3 The partially enlarged view shows an L-shaped annular outer positioning groove 411a in the axial section, so that the battery outer shell 110a abuts against the end surface of the controller outer shell 410a facing the bottom of the soft-pack lithium-ion battery cell 200a. The outer positioning groove 411a is used to match the concentric positioning of the battery outer shell 110a and has the function of preventing welding flames or welding slag from entering the battery outer shell 110a and damaging the soft-pack lithium-ion battery cell during the welding process of the controller outer shell 410a and the battery outer shell 110a.

[0110] After the housing positioning ring 475a is installed at the axial bottom of the controller 400a, insulation is established between the negative electrode 220a of the soft-pack lithium-ion battery cell 200a and the controller housing 410a to prevent the negative electrode 220a from short-circuiting with the controller housing 410a.

[0111] In another embodiment, in order to enhance the structural strength and high temperature resistance of the shell positioning ring 475a, the shell positioning ring 475a may also be made of metal material, which is welded on the insulating layer or insulating sheet on the controller outer shell 410a, or the shell positioning ring 475a and the controller outer shell 410a may be integrally formed to form an L-shaped annular external positioning groove 411a directly at the axial bottom of the controller outer shell 410a. In this case, it is necessary to insulate one end face of the controller outer shell 410a facing the soft-pack lithium-ion battery cell 200a.

[0112] The negative electrode 220a of the soft-pack lithium-ion battery cell 200a is made of nickel, and the inner electrode 340a of the controller 400 is made of nickel or nickel-plated metal. Figure 3 , Figure 8 As shown, the negative electrode 220a of the soft-pack lithium-ion battery cell 200a is welded to the inner electrode 340a of the controller 400a by resistance welding or laser welding, so that the negative electrode 220a of the soft-pack lithium-ion battery cell 200a and the inner electrode 340a are fixed by welding and establish electrical connection.

[0113] like Figure 3 , Figure 7 As shown, the battery housing 110a is electrically connected to the positive electrode 210a of the soft-pack lithium-ion battery cell 400a and the controller housing 410a by welding, and is electrically connected to the ground terminal GND of the charging and / or discharging control circuit in the controller 400a through the controller housing 410a, serving as a common ground terminal for the controller 400a to control the charging and / or discharging of the soft-pack lithium-ion battery cell 200a and the charging input and discharging output of the rechargeable battery 100a.

[0114] like Figure 1 , Figure 2 , Figure 3 As shown, a controller cover 460a made of a transparent or translucent light-conducting insulating material is installed at one end of the negative electrode of the rechargeable battery 100a, which is used to transmit the charge and discharge status light signal emitted by the indicator light 324a to the outside of the rechargeable battery 100a and serve as a cover of the controller 400a. If it is not necessary to display the charge and discharge status light signal outside the rechargeable battery 100a, the controller cover 460a can be made of ordinary non-light-conducting materials and only serve as a cover of the controller 400a.

[0115] The thickness dimension of the controller cover 460a of the controller 400 is associated with the height dimension of the negative electrode end cover 330a of the controller 400, that is, by designing the thickness of the controller cover 460a, the protruding height of the negative electrode end cover 330a at the negative electrode end can be adjusted. For example, the negative electrode end cover 330a can protrude from the controller cover 460a, or can be lower than the controller cover 460a, or can be parallel to the controller cover 460a and have the same height.

[0116] If it is necessary to form or test the soft-pack lithium-ion battery cell 200a after the rechargeable battery 100a is assembled, the controller 400a can be used to form and test the soft-pack lithium-ion battery cell 200a;

[0117] If it is necessary to form and test the soft-pack lithium-ion battery cell 20a across the controller 400a after the rechargeable battery 100a is assembled, this can be achieved by connecting the battery cell test point 316a electrically connected to the negative electrode 220a on the circuit board 300a as the negative electrode 220a to a lithium-ion battery formation tester for formation or testing without installing the controller cover 460a.

[0118] The rechargeable battery 100a of this embodiment adopts the controller 400a disclosed in the present invention, and its height is reduced (the following description of the embodiment of the controller specifically explains how the controller 400a reduces its height), thereby increasing the available space of the soft-pack lithium-ion battery cell 200a built into the rechargeable battery 100a, thereby increasing the volume of the soft-pack lithium-ion battery cell 200a, increasing the storage energy, increasing the specific energy of the rechargeable battery 100a, and improving the cost performance of the rechargeable battery 100a.

[0119] The controller housing 410a is electrically connected to the battery housing 110a, and is electrically connected to the positive electrode 210a through the battery housing 110a. The battery housing 110a is used as the positive electrode structure of the rechargeable battery 100a, which simplifies the structure of the rechargeable battery 100a and reduces the structural material and process costs of the rechargeable battery 100a.

[0120] Implementation 2: Example of aluminum shell lithium ion battery

[0121] Taking the implementation of the rechargeable battery 100b composed of aluminum shell lithium ion cells as an example, the structural characteristics of the aluminum shell lithium ion battery disclosed in the present invention are explained. This implementation is suitable for rechargeable batteries of different types composed of aluminum shell lithium ion cells, for example, No. 5 battery, No. 7 battery, No. 3 battery, etc.

[0122] like Fig. 9 and Fig.10 As shown, the rechargeable battery 100b (i.e., the aluminum shell lithium ion battery) is composed of an aluminum shell lithium ion battery cell 200b. The internal structure of the rechargeable battery 100b is as follows: Fig.11 As shown, the assembly relationship is as follows Fig.12 shown.

[0123] Combination Fig.13 and Fig.14 As shown, the rechargeable battery 100b (i.e., an aluminum shell lithium ion battery) includes a cylindrical battery shell 110b, an aluminum shell lithium ion battery cell 200b installed in the battery shell 110b, a positive electrode cap 120b connected to one end of the battery shell 110b, and a controller 400b (i.e., a battery controller) arranged at the other end of the battery shell relative to the positive electrode cap 120b.

[0124] The battery outer shell 110b is made of aluminum material, and one end of the battery outer shell 110b forms a closed end boss 112b, and the closed end boss 112b is connected to the positive electrode cap 120b. The shape of the positive electrode cap 120b is adapted to the shape of the closed end boss 112b, so that the positive electrode cap 120b can be sleeved on the closed end boss 112b. The positive electrode cap 120b can be made of stainless steel or other conductive metal materials, which can enhance the positive electrode structural strength and oxidation resistance of the rechargeable battery 100b.

[0125] The positive electrode cap 120b is assembled and fixed on the closed end boss 112b of the battery outer shell 110b by using an interference fit extrusion assembly method, so that the positive electrode cap 120b is assembled and fixed with the battery outer shell 110b and an electrical connection is established. The closed end boss 112b of the battery outer shell 110b and the positive electrode cap 120b can also be fixed by using interference fit temperature difference assembly, interference fit structural adhesive bonding fixation, riveting, riveting ultrasonic welding, laser welding and other process methods.

[0126] In one embodiment, the closed end boss 112b can also be directly used as a positive electrode cap, as a positive electrode for charging input and discharging output. The negative electrode end cap 330b of the controller 400b serves as a negative electrode for charging input and discharging output.

[0127] The aluminum shell lithium ion battery cell 200b includes an aluminum shell lithium ion battery cell core 201b and a battery cell cap 230b. The aluminum shell lithium ion battery cell core 201b is filled with electrolyte. The aluminum shell lithium ion battery cell core 201b is welded in the battery outer shell 110b. The battery outer shell 110b and the battery cell cap 230b jointly complete the packaging of the aluminum shell lithium ion battery cell core 201b, thereby forming the aluminum shell lithium ion battery cell 200b.

[0128] The two opposite ends of the aluminum shell lithium ion battery core 201 b respectively have a positive electrode 210 b and a negative electrode exposed outside the battery package.

[0129] The cell cap 230b is disposed at the open end of the battery outer shell 110b and closes the opening of the battery outer shell 110b. The cell cap 230b includes a circular cell cap housing 231b in the shape of a flat bottom cover and an extraction electrode 232b made of a conductive material riveted on the cell cap housing 231b.

[0130] The battery cap shell 231b includes a circular cover bottom 2311b and a cover edge 2312b arranged around the cover bottom 2311b. The lead-out electrode 232b is riveted to the center of the cover bottom 2311b and penetrates the cover bottom 2311b. The battery outer shell 110b is made of aluminum, the cover bottom 2311b of the battery cap shell 231b is an insulating material, the cover edge 2312b is a conductive material, and the cover edge 2312b connects the battery outer shell 110b and the controller outer shell 410b of the controller 400b. The lead-out electrode 232b is exposed on one side of the battery cap shell 231b and is electrically connected to the negative electrode of the aluminum shell lithium-ion battery core 201b, and the lead-out electrode 232b is located on one side of the battery cap shell 231b and contacts and electrically connects to the inner electrode contact station of the inner electrode in the controller 400b.

[0131] The cell cap housing 231 b is provided with a flange structure for assembling with the controller 400 b , and the controller 400 b is sleeved with the cell cap 230 b through the flange structure.

[0132] The lead-out electrode 232b may be made of metal nickel. The cell cap shell 231b may be made of metal aluminum.

[0133] The cell cap 230b is installed at the open end of the battery outer shell 110b. The cell cap shell 231b and the battery outer shell 110b are welded into an integrated structure by laser welding and an electrical connection is established. After the aluminum shell lithium ion battery 200b is welded, the cell cap shell 231b becomes a component of the battery outer shell 110b, and the lead electrode 232b of the cell cap shell 231b becomes the negative electrode 220b of the aluminum shell lithium ion battery 200b.

[0134] like Fig.15and Fig.16 As shown, an insulating layer 470b is provided on the surface of the battery cap shell 231b of the aluminum shell lithium ion battery 200b, which is used to establish electrical insulation between the battery cap shell 231b and the inner electrode 340b of the controller 400b. The side of the controller 200b facing the battery cap 230b is also provided with an insulating layer 470b, which is used to establish electrical insulation between the controller outer shell 410b and the inner electrode 340b of the controller 400b. The insulating layer 470b can be composed of a polyimide film with a self-adhesive sticker on one side. In addition, the method of applying an insulating coating can also be adopted to achieve electrical insulation.

[0135] like Fig.11 , Fig.17 As shown, the inner electrode 340b of the controller 400b is welded to the negative electrode 220b of the aluminum shell lithium ion battery cell 200b by resistance welding or laser welding, and the inner electrode 340b is electrically connected to the negative electrode 220b of the aluminum shell lithium ion battery cell 200b.

[0136] The inner electrode 340b of the controller 400b can be made of nickel metal, and the negative electrode 220b can also be made of nickel metal. The inner electrode 340a can also be made of other conductive metal materials that are formed and then nickel-plated.

[0137] like Fig.11 and Fig.17 As shown, the controller 400b is aligned to be assembled coaxially with the aluminum shell lithium ion battery cell 200b, so that the open end side wall of the battery cap shell 231b of the aluminum shell lithium ion battery cell 200b is inserted into the annular outer positioning groove 411b of the controller outer shell 410b and abuts against the bottom surface of the controller outer shell 410b.

[0138] By laser welding, the battery cap housing 231b and the controller housing 410b are assembled to establish electrical connection and form a Fig. 9 , Fig.10 The structure shown enables the controller housing 410b to establish electrical connection with the battery housing 110b through the cell cap housing 231b.

[0139] Further, if Fig.10 , Fig.11 As shown, a controller cover 460b is installed at the negative electrode end of the rechargeable battery 100b. By designing the thickness of the controller cover 460b relative to the height of the negative electrode end cap 330b, the shape structure of the negative electrode end of the rechargeable battery 100b can be a platform-type negative electrode. The controller cover 460b can be made of ordinary insulating material or made of light-conducting insulating material.

[0140] The structure of the inner electrode 340b connected to the lead-out electrode 2311b of the cell cap 230b may be a soldering table structure or a soldering sheet structure.

[0141] like Fig.11 and Fig.12 As shown, an annular external positioning groove 411b structure is provided at the axial bottom of the controller 400b, which is used for assembling, positioning and welding of the cell cap shell 231b of the aluminum shell lithium-ion battery cell 200b, and has the function of preventing welding flame or welding slag from entering the cell cap 230b during the welding process between the controller outer shell 410b and the cell cap shell 231b.

[0142] The aluminum shell lithium ion battery cell 200b has been formed and tested before being used to assemble the rechargeable battery 100b; if it is necessary to form and test the aluminum shell lithium ion battery cell 200b after the rechargeable battery 100b is completed, the formation and testing can be performed through the controller 400b or across the controller 400b.

[0143] Formation and detection are performed through the controller 400b: After the rechargeable battery 100b is welded, the positive electrode and the negative electrode of the rechargeable battery 100b are connected to the charging power supply with the same polarity, and the lithium-ion battery cell 200b is formed and detected through the controller 400b.

[0144] Cross the controller 400b to perform formation and testing: The rechargeable battery 100b is temporarily not installed with the controller cover 460b, and the battery cell test point 316b (such as Fig.48 ) is connected to the negative electrode of a conventional lithium-ion battery formation tester, and the positive electrode of the rechargeable battery 100b is connected to the positive electrode of the lithium-ion battery formation tester, and the aluminum shell lithium-ion battery cell 200b is directly formed and tested by the lithium-ion battery formation tester.

[0145] The rechargeable battery 100a of the present embodiment adopts the improved controller 400a disclosed in the present invention and has a lower height (how the controller 400a is lowered in height is specifically described in the following embodiment of the controller), thereby increasing the available space of the aluminum shell lithium ion battery cell 200b that is matched with the rechargeable battery 100b. By increasing the volume of the aluminum shell lithium ion battery cell 200b, the storage energy is increased, the specific energy of the rechargeable battery 100b is increased, and the cost performance of the rechargeable battery 100b is improved.

[0146] The controller housing 410b is electrically connected to the battery housing 110b through the cell cap housing 231b, and is electrically connected to the positive electrode 210b of the aluminum shell lithium-ion cell roll 201b through the battery housing 110b. The battery housing 110b is used as the positive electrode structure of the rechargeable battery 100b, which simplifies the structure of the rechargeable battery 100b and reduces the structural material and process costs of the rechargeable battery 100b.

[0147] Implementation 3: Example of Direct-Sealed Lithium-Ion Battery

[0148] like Fig.18 , Fig.19 As shown, the rechargeable battery 100c adopts a directly sealed lithium ion battery cell 200c. The internal structure of the rechargeable battery 100c is as follows: Fig. 20 As shown, the structural assembly relationship of the rechargeable battery 100c is as follows Fig.21 shown.

[0149] The rechargeable battery 100c (ie, a direct-sealed lithium-ion battery) comprises a cylindrical battery outer shell 110c, a direct-sealed lithium-ion battery cell 200c installed in the battery outer shell 110c, and a positive electrode cap 120c disposed at one end of the battery outer shell 110c.

[0150] The direct-sealed lithium-ion battery cell is filled with electrolyte, and the electrolyte inside is directly sealed by the battery outer shell 110c and the controller 400c.

[0151] The battery outer shell 110c can be made of aluminum material, and one end of the battery outer shell 110c forms a closed end boss 112c, and the closed end boss 112c is connected to the positive electrode cap 120c. The shape of the positive electrode cap 120c is adapted to the shape of the closed end boss 112c, so that the positive electrode cap 120c can be sleeved on the closed end boss 112c. The positive electrode cap 120c can be made of stainless steel or other conductive metal materials, which can enhance the structural strength and oxidation resistance of the positive electrode of the rechargeable battery 100c.

[0152] The positive electrode cap 120c can be assembled and fixed on the closed end boss 112c of the battery outer shell 110c by an interference fit extrusion assembly method, and an electrical connection can be established. The closed end boss 112c of the battery outer shell 110c and the positive electrode cap 120c can also be fixed by interference fit temperature difference assembly, interference fit structural adhesive fixing, riveting, riveting ultrasonic welding, laser welding and other process methods.

[0153] In one embodiment, the positive electrode cap 120c may not be installed, and the structure size of the closed end boss 112c of the battery outer shell 110c may be directly modified to replace the positive electrode cap 120c. Alternatively, the battery outer shell may be made of materials such as stainless steel or nickel-plated iron, and the positive electrode cap 120c does not need to be attached, and the structure size of the closed end boss 112c of the lithium-ion battery outer shell may be directly modified to replace the positive electrode cap 120c.

[0154] like Fig. 20 and Fig.21As shown, the two opposite ends of the direct-sealed lithium-ion battery cell 200c respectively have a positive electrode 210c and a negative electrode 220c. The positive electrode 210c is made of metal aluminum, and the negative electrode 220c is made of metal nickel.

[0155] The rechargeable battery 100c further includes a controller 400c disposed at the other end of the battery outer shell 110c opposite to the positive electrode cap 120b. The controller 400c is disposed at the open end of the battery outer shell 110c and directly closes the opening of the battery outer shell 110c.

[0156] like Fig. 20 and Fig.21 As shown, the direct-sealed lithium-ion battery cell 200c is installed into the battery outer shell 110c with the positive electrode 210c facing the closed end of the battery outer shell 110c, and the positive electrode 210c of the direct-sealed lithium-ion battery cell 200c is welded to the closed end of the battery outer shell 110c.

[0157] like Fig. 20 , Fig.21 and Fig. 22 As shown, an insulating layer 470 is pasted on the axial bottom surface of the controller housing 410c of the controller 400c facing the direct-sealed lithium-ion battery cell. The insulating layer 470 can be composed of a polyimide film with a self-adhesive sticker on one side, which is used to establish electrical insulation between the negative electrode 220c of the direct-sealed lithium-ion battery cell 200c and the controller housing 410c. The insulating layer 470c can also be formed by coating an electrically insulating coating resistant to electrolyte corrosion on the axial bottom surface of the controller housing 410c.

[0158] Furthermore, the controller 400c is provided with a controller cover plate 460c and a cover plate light shielding ring 490c on the end surface where the negative electrode end cap 330c is installed. The controller cover plate 460c can be made of a transparent or translucent light-conducting insulating material, and is used to conduct the light emitted by the indicator light inside the controller 400c. The cover plate light shielding ring 490c covers the top of the controller cover plate 460c, and is used to shield the light emitted by the indicator light inside the controller 400c, so that the light is emitted from the side of the controller cover plate 460c.

[0159] like Fig. 22 As shown, the negative electrode 220c of the direct-sealed lithium-ion battery 200c is welded to the inner electrode 340c of the controller 400c by resistance welding or laser welding, so that the negative electrode 220c of the direct-sealed lithium-ion battery 200c and the inner electrode 340c are fixed by welding and establish an electrical connection. The negative electrode 220c of the direct-sealed lithium-ion battery 200c is made of nickel material, and the inner electrode 340c is made of nickel material, which is easy to weld with the negative electrode 220c and meets the material requirements of the electrochemical system of the direct-sealed lithium-ion battery 200c.

[0160] like Fig. 22 As shown, electrolyte is poured into the cavity of the battery outer shell 110c welded with the direct-sealed lithium-ion battery cell 200c at the open end of the battery outer shell 110c.

[0161] like Fig. 20 , Fig.21 , Fig. 22 As shown, Fig. 22 The controller 400c shown is aligned to be assembled coaxially with the battery housing 110c, so that the side wall of the open end of the battery housing 110c is inserted into the annular outer positioning groove of the controller housing 410c and abuts against the bottom surface of the controller housing 410c.

[0162] Laser welding is used to weld the controller housing 410c and the battery housing 110c together and establish electrical connection to form a Fig.18 , Fig.19 , Fig. 20 The rechargeable battery 100c is shown.

[0163] The welded rechargeable battery 100c needs to be formed and tested before it can become a finished product. The formation and testing of the direct-sealed lithium-ion battery can be performed through the controller 400c, or the direct-sealed lithium-ion battery can be directly formed and tested without the controller 400c.

[0164] The structure of the rechargeable battery 100c after assembly is as follows: Fig.18 , Fig.19 , Fig. 20 After the assembled rechargeable battery 100c is purified, the positive electrode cap 120c of the rechargeable battery 100c is connected to the positive electrode of the DC regulated power supply, and the negative electrode end cap 330c of the rechargeable battery 100c is connected to the negative electrode of the DC regulated power supply. After the power is turned on, the controller 400c performs formation and detection on the direct-sealed lithium-ion battery cell 200c, and transmits the detection result optical signal emitted by the indicator light to the outside of the rechargeable battery 100c through the controller cover 460c.

[0165] If it is necessary to bypass the controller 400c to directly form and test the direct-sealed lithium-ion battery cell 200c, the following method can be used: Fig.23 The controller assembly shown is not installed with the controller cover 460c and the cover light shielding ring 490c. Fig.23As shown, the formation and testing method is: the negative electrode end of the rechargeable battery 100c assembled by the controller assembly is exposed on the circuit board, and the cell test point 316c electrically connected to the negative electrode 220c of the direct-sealed lithium-ion battery 200c is exposed. After the rechargeable battery 100c is purified, the cell test point 316c is connected to the negative electrode of the lithium-ion battery formation tester, and the positive electrode cap 120c of the rechargeable battery 100c is connected to the positive electrode of the lithium-ion battery formation tester. After the power is turned on, the lithium-ion battery formation tester forms and tests the direct-sealed lithium-ion battery 200c.

[0166] After the direct-sealed lithium-ion battery cell 200 b is formed and tested, the controller cover 460 c and the cover light shielding ring 490 c are installed according to the controller structure.

[0167] Furthermore, in one embodiment, the controller 400c does not have an indicator light disposed inside. In this case, the controller cover 460c may also be an ordinary insulating cover without a light-guiding function, and the cover light-shielding ring 490c may also be omitted.

[0168] like Fig.18 , Fig.19 , Fig. 20 , Fig.21 As shown, the rechargeable battery 100c is composed of a controller 400c, a direct-sealed lithium-ion battery cell 200c, and a battery outer shell 110c assembled and welded into one body. The direct-sealed lithium-ion battery cell 200c is welded in a package formed by the battery outer shell 110c and the controller 400c, and the controller 400c is welded to one end of the negative electrode of the rechargeable battery 100c.

[0169] like Fig.19 and Fig. 20 As shown, the thickness dimension of the controller cover 460c and the thickness dimension of the cover shading ring 490c are designed in association with the height dimension of the negative electrode end cap 330a, so that the structure formed at one end of the negative electrode of the rechargeable battery 100c is a concave-type negative electrode, and the depth of the recess of the negative electrode end cap 330c at one end of the negative electrode can be set.

[0170] like Fig. 20 and Fig.21 As shown, the battery housing 110c is electrically connected to the positive electrode 210c of the direct-sealed lithium-ion battery cell 200c and the controller housing 410c by welding, and is electrically connected to the ground terminal GND of the charging and / or discharging control circuit through the controller housing 410c, serving as a common ground terminal for the controller 400c to control the charging and / or discharging of the direct-sealed lithium-ion battery cell 200c and the charging input and discharging output of the rechargeable battery 100c.

[0171] like Fig. 20 and Fig.21As shown, an annular external positioning groove is provided at the axial bottom of the controller 400c, which is used to cooperate with the battery outer shell 110c for assembly and positioning, and has the function of preventing welding flame or welding slag from entering the battery outer shell 110c and damaging the lithium-ion battery cell during the welding process between the controller outer shell 410c and the battery outer shell 110c.

[0172] The rechargeable battery 100c of the present embodiment adopts the controller 400c disclosed in the present invention. Since the structure of the controller 400c is simplified and the height is reduced (the following embodiment of the controller specifically describes how the height of the controller 400c is reduced), the available space of the direct-sealed lithium-ion battery cell 200c built into the rechargeable battery 100c is increased, and the volume of the direct-sealed lithium-ion battery cell 200c is increased to increase the storage energy, thereby increasing the specific energy of the rechargeable battery 100c and improving the cost performance of the rechargeable battery 100c.

[0173] The controller housing 410c is electrically connected to the battery housing 110c, and is electrically connected to the lithium-ion battery positive electrode 210c through the battery housing 110c. The battery housing 110c is used as the positive electrode structure of the rechargeable battery 100c, which simplifies the structure of the rechargeable battery 100c and reduces the structural material and process costs of the rechargeable battery 100c.

[0174] Specific embodiments of the battery controller

[0175] The controller is the core component of the rechargeable battery. It is the key component for the rechargeable battery to achieve external electrodes and body structure dimensions that comply with the GB / T 8897.2 (IEC 60086-2) standard and discharge voltage compatible with the standardized primary battery nominal voltage of GB / T 8897.2 (IEC 60086-2).

[0176] The structural implementation method of the controller embodiment does not mean that the embodiment can only be implemented by the structural method given in the embodiment. The structural implementation method given in any embodiment can be implemented by adopting corresponding methods according to different technical requirements.

[0177] The controller in this article refers to a controller that controls charging and / or discharging, and the controller can also be called a battery controller.

[0178] Implementation of the controller 400a corresponding to the soft-pack lithium-ion battery of implementation 1

[0179] Taking the controller 400 a as an example, an implementation of the rechargeable battery 100 a including the soft-pack lithium-ion battery cell 200 a and the controller 400 a is described.

[0180] like Figure 24 to Figure 28 , Fig.36As shown, the controller 400a includes a circuit board 300a, a negative electrode end cap 330a, an inner electrode 340a and a controller outer shell 410a.

[0181] The circuit board 300a is provided with a first surface and a second surface corresponding to each other. Fig.24 The first surface of the circuit board 300a is shown. Fig.25 FIG. 2 shows the second surface of the circuit board 300 a. Fig.24 , Fig.25 As shown, the electronic components constituting the charging and / or discharging control circuit are respectively welded on the first surface and the second surface of the circuit board 300a. The circuit board 300a is provided with a first pad 321a (i.e., the outer shell pad), a second pad 322a (i.e., the negative electrode end cap pad) and a third pad 323a (i.e., the inner electrode pad). The electronic components of the charging and / or discharging control circuit of the circuit board 300a are soldered by chip soldering, which is realized by double-sided PCB board chip soldering and hot air reflow soldering process.

[0182] like Fig.26 and Fig. 27 As shown, the inner electrode 340a is arranged on the second surface of the circuit board 300a, and the inner electrode 340a is electrically connected to the circuit board 300a. The inner electrode 340 includes an inner electrode contact platform 342a parallel to the circuit board and an inner electrode welding positioning foot 341a connected to the inner electrode contact platform 342a, and the inner electrode welding positioning foot 341a is fixed on the circuit board 300a and electrically connected to the circuit board 300a. An accommodating space for arranging circuit components is formed between the inner electrode contact platform 342a and the circuit board 300a. In other words, the inner electrode contact platform 342a has a certain height, and some components can be accommodated under the inner electrode contact platform 342a.

[0183] A convex edge 343a perpendicular to the inner electrode contact platform 342a is integrally formed on the periphery of the inner electrode contact platform 342a, and the inner electrode welding positioning foot 341a is indirectly connected to the inner electrode contact platform 342a via the convex edge 343a.

[0184] There are two inner electrode welding positioning pins 341a, which are the first positioning pin (i.e. Fig.26 The left positioning foot) and the second positioning foot (i.e. Fig.26 The first positioning foot and the second positioning foot both include: a positioning foot base 3411a connected to the internal electrode contact platform 342a and a positioning foot welding portion 3412a formed at one end of the positioning foot base 3411a for welding connection to the circuit board 300a, wherein the width of the positioning foot base 3411a of the first positioning foot is greater than the width of the positioning foot base 3411a of the second positioning foot.

[0185] The positioning foot welding part 3412a of the first positioning foot includes: two pin pins 3414a formed on the positioning foot base 3411a of the first positioning foot, which are spaced from each other and can be inserted into the circuit board 300a, and a flat soldering foot 3413a formed between the two pin pins 3414a and flatly attached to the surface of the circuit board 300a. The flat soldering foot 3413a is in a fork shape. The circuit board 300a is provided with positioning holes 305a for each pin pin 3414a to be inserted, and a third soldering pad 323a (i.e., an inner electrode soldering pad) for the flat soldering foot 3413a to be flatly attached thereto and soldered thereto, and the third soldering pad 323a covers the periphery of the positioning hole 305a. The pin pin 3414a of the first positioning foot and the flat soldering foot 3413a share the same soldering pad. The positioning foot welding part 3412a of the second positioning foot is a pin pin 3414a formed on the positioning foot base 3411a of the second positioning foot.

[0186] The positioning foot bases 3411a of the first positioning foot and the second positioning foot are formed by integrally bending and extending the corresponding inner electrode contact platform 342a, so that the positioning foot bases 3411a are step-shaped.

[0187] exist Fig.26 In the embodiment, the inner electrode 340a is provided with a convex edge 343a, and the convex edge 343a and the inner electrode contact platform 342a form a cylindrical cover body to cover some components. However, the present invention is not limited thereto, and the inner electrode 340a may also be provided with no convex edge 343a, that is, the inner electrode 340a includes the inner electrode contact platform 342a and two inner electrode welding positioning feet 341a connected to the inner electrode contact platform 342a.

[0188] In addition, in the present embodiment, the inner electrode 340a has two inner electrode welding positioning pins 341a, but it is not limited thereto. The number of the inner electrode welding positioning pins can be changed according to actual applications, that is, it can also be 1 or more than 3.

[0189] like Fig.28 and Fig.29 As shown, the negative electrode end cap 330a is made of a metal conductive material and is electrically connected to the circuit board 300a. The negative electrode end cap 330a includes a circular negative electrode end cap plate 332a and a cap wall 333a surrounding the negative electrode end cap plate 332a. The negative electrode end cap plate 332a and the cap wall 333a constitute a cap body with a bottom opening. One end of the cap body is open and the other end is closed. The cap body covers the first surface of the circuit board 300a and forms a closed body with the circuit board 300a. The cap body is in close contact with the circuit board 300a in the circumference, and some or all of the circuit components on the first surface are encapsulated in the inner cavity of the cap body.

[0190] The negative electrode end cap 330a is closed except for the bottom opening, so that the negative electrode end cap 330a covers part or all of the components on the first surface of the circuit board 300a, thereby being able to play an electromagnetic shielding role for the internal components. The circuit board 300a is a circular circuit board, and the negative electrode end cap 330a covers the middle area of ​​the first surface of the circuit board 300a. The cap wall 333a extends integrally along the axial direction to form at least two spaced negative electrode end cap welding positioning feet 331a. The circuit board 300a is provided with a positioning groove 304a for the negative electrode end cap welding positioning feet 331a to be inserted, and the negative electrode end cap 330a is electrically connected to the circuit board 300a through the negative electrode end cap welding positioning feet 331a. A long strip of tin guide groove 3311a is provided at the end of the negative electrode end cap welding positioning foot 331a. The outline of the tin guide groove 3311a is arch-shaped, so that the end of the negative electrode end cap welding positioning foot 331a is forked.

[0191] like Fig.25 As shown, a second soldering pad 322a is provided on the second surface of the circuit board 300a, and the second soldering pad 322a is used for soldering the negative electrode terminal cap welding positioning pin 331a.

[0192] Combination Fig.24 and Fig.28 As shown, the annular area of ​​the first surface of the circuit board 300a that is not covered by the cap body is also provided with light-transmitting holes 301a that penetrate the first surface and the second surface of the circuit board 300a. The periphery of each light-transmitting hole 301a on the second surface of the circuit board 300a is provided with an indicator pad, and the indicator 324 is reversely soldered on the indicator pad on the second surface of the circuit board 300a and covers the light-transmitting hole 301a, and the light-emitting surface of the indicator 324a faces the light-transmitting hole 301a, thereby, the light signal emitted by the indicator 324a can be irradiated axially outward from the first surface through the light-transmitting hole 301a through the circuit board 300a. The light-transmitting hole 301a can be filled with light-guiding glue. The indicator light is used to indicate the charge and discharge status of the battery, and it can be a sheet-shaped LED lamp. An LED lamp is arranged at each light-transmitting hole 301a.

[0193] like Fig.34 As shown, a controller cover 460a covering each light-transmitting hole 301a is arranged in the annular area of ​​the first surface of the circuit board 300a not covered by the negative electrode end cap 330a. The controller cover 460a is made of light-conducting insulating material, and the light emitted by the indicator light 324a is guided to the controller cover 460a through the light-transmitting hole 301a.

[0194] The side of the controller cover 460a facing away from the circuit board 300a is also covered with a cover shading sheet or coated with a cover shading layer, and the first surface of the circuit board 300a is coated with an insulating layer of reflective and insulating material to enhance the reflection of the light signal of the controller cover 460a, and together with the solder resist ink coated on the first surface of the circuit board 300a, form electrical insulation between the circuit board 300a and the negative electrode end cover 330a. In this way, the light emitted by the indicator light 324a cannot be emitted from the upper and lower surfaces, but can only be emitted from the outer peripheral side wall of the controller cover 460a, so that the outer peripheral side wall of the controller cover 460a forms a ring-shaped luminous surface.

[0195] The surface of the annular area of ​​the first surface of the circuit board 300a that is not covered by the negative electrode end cover 330a is coated with a transparent light-conducting adhesive. The controller cover 460a is installed on the annular area of ​​the circuit board 330a. After the light-conducting adhesive is cured, the controller cover 460a is bonded and fixed to the surface of the circuit board 300a at the axial upper part of the controller 400.

[0196] The indicator light 324a is reversely mounted on the light-transmitting hole 301a in the annular area of ​​the circuit board 300a, so that the light signal emitted by the indicator light 324a can pass through the circuit board 300a through the light-transmitting hole 301a and directly enter the controller cover 460a, thereby avoiding the sealing process inside the negative electrode end cover 330a, and making the controller cover 460a, which is a structural wearing part, not participate in the structural sealing of the controller 400a. In this way, even if the controller cover 460a is damaged, the structural sealing protection level of the controller 400a will not be reduced.

[0197] In other embodiments, multiple indicator lights 324a may also be welded and fixed on the first surface of the circuit board 300a, and multiple indicator lights 324a are spaced and distributed in the annular area not covered by the negative electrode end cover 342a. Since the indicator lights 324a are directly attached to the first surface, it is not necessary to open a light-transmitting hole on the circuit board 300a. Accordingly, a clearance groove for accommodating the indicator lights is provided on the controller cover 460a covering the annular area, which is used to provide a structural space for the indicator lights 324a after the controller cover 460a and the circuit board 300a are assembled.

[0198] In other embodiments, the indicator light may be an ultraviolet indicator light. Correspondingly, the controller cover 460a is made of a light-guiding material with fluorescent powder added thereto. The light from the ultraviolet lamp shines on the controller cover 460a, stimulating the fluorescent powder to convert the ultraviolet light into visible light visible to the human eye, so that the outer circular side of the controller cover 460a forms a luminous surface.

[0199] In other embodiments, the controller 400a may not be provided with an indicator light. In this case, the light-transmitting hole on the circuit board may be eliminated, and the controller cover 460a may be made of a common non-light-conducting insulating material.

[0200] Combination Fig.24 and Fig.28 As shown, the annular area of ​​the first surface of the circuit board 300a not covered by the negative electrode end cap 330a is also provided with a cell test point 316a, and the controller cover 460a covers the cell test point 316a. The cell test point 316a is electrically connected to the third pad 323a and electrically connected to the negative electrode 220 of the soft-pack lithium-ion battery cell through the third pad 323a, so that the cell test point 316a becomes a process test electrode that can be directly electrically connected to the negative electrode 220 of the lithium-ion battery cell outside the assembled rechargeable battery 100a across the controller 400a to form or detect the lithium-ion battery cell 200.

[0201] like Fig.29 As shown, the negative electrode end cap 330a is welded on the first surface of the circuit board 300a, and the inner electrode 340a is welded on the second surface of the circuit board 300a. The negative electrode end cap 330a, the circuit board 300a and the inner electrode 340a form a three-layer sandwich structure, that is, a control circuit assembly 350a is formed. The negative electrode end cap 330a and the inner electrode 340a are both formed with an inner cavity, in which all components on the first surface and some components on the second surface are accommodated, so that the components or devices on the circuit board are arranged compactly, the limited space can be fully utilized, and the thickness of the controller is significantly reduced. In this way, the depth of the controller housing 410a can be reduced.

[0202] like Fig.30 As shown, the controller housing 410a is provided with an inner cavity. The circuit board 300a is accommodated in the inner cavity, and the controller housing 410a is electrically connected to the circuit board 300a. The first surface of the circuit board 300a faces the top of the controller housing 410a, and the negative electrode end cap 330a protrudes from the top opening of the controller housing 410a. The second surface of the circuit board 300a faces the bottom of the controller housing 410a, and a through hole is opened at the bottom of the controller housing 410a, through which the inner electrode 340a is exposed to the outside to be electrically connected to the negative electrode 220a of the soft-pack lithium-ion battery 200a.

[0203] The controller housing 410a includes a cylindrical side wall 413a and a bottom wall 414a formed at one axial end of the side wall 413a and perpendicular to the side wall 413a. The circuit board 300a is mounted in the inner cavity surrounded by the side wall 413a. The side wall 413a can be cylindrical or square. A limiting boss 415a formed of a conductive metal material is protruding from the inner surface of the side wall 413a. The limiting boss 415a is an annular platform protruding from the inner surface of the side wall 413a. The annular platform has an annular support plane protruding from the inner surface of the side wall 413a for supporting the circuit board. The support plane and the side wall 413a form an annular inner positioning groove 412a with an L-shaped axial cross section. The bottom wall 414a is provided with a through hole in the center, through which the inner electrode contact platform 342a is exposed to the outside of the controller housing 410a, and there is a gap between the edge of the inner electrode contact platform 342a and the edge of the through hole. The other end of the controller housing 410a opposite to the bottom wall 414a is a cylindrical open end.

[0204] When the circuit board 300a is mounted on the limiting boss 415, the first surface of the circuit board 300a is flush with the end surface of the open end of the controller housing 410a. The position where the circuit board 300a contacts the limiting boss 415a is provided with a first pad 321a (i.e., housing pad) for conductively welding the limiting boss 415a.

[0205] Combination Fig.26 As shown, the first pad 321a is a plurality of discrete pads arranged at intervals and distributed around the edge of the circuit board 300a, and the edge line of each discrete pad is in an arc shape that is arched inward toward the center of the circuit board 300a. Of course, in other embodiments, the edge line of each discrete pad may also be in an arc shape that is arched outward away from the center of the circuit board 300a.

[0206] In this embodiment, the first pads 321a are discontinuous pads, but the present invention is not limited thereto. The first pads 321a may also be interconnected and connected to form a circle at the edge of the circuit board 300a (eg, Fig.49 The first solder pad 321c is shown.

[0207] In this embodiment, the limiting boss 415 in the side wall 413a of the controller outer shell 410a is a continuous annular boss, but is not limited to this. The limiting boss 415a can be composed of a plurality of protrusions spaced apart on the side wall 413a, each protrusion having a supporting surface at the same height, and the circuit board is mounted and fixed on the supporting surface.

[0208] like Fig.31 and Fig.32 As shown, the circuit board 300a is welded to the limiting boss 415a on the controller outer shell 410a.

[0209] In the area of ​​the circuit board 300a covered by the cap body of the negative electrode end cap 330a, there are provided glue injection holes 302a and exhaust overflow holes 303a that penetrate the first surface and the second surface. The glue injection holes 302 and the exhaust overflow holes 303a are far apart. The aperture of the glue injection holes 302a is larger than the aperture of the exhaust overflow holes 303a. The cavity formed by the negative electrode end cap 330a and the first surface of the circuit board 300a is filled with thermal conductive glue through the glue injection holes 302a and the exhaust overflow holes 303a, so that the cavity formed by the side wall and bottom wall of the controller outer shell 410a and the second surface of the circuit board 300a is filled with thermal conductive glue 440a. Specifically, the exhaust overflow holes 303a exhaust gas during the pouring process of the thermal conductive glue 440a, and after the cavity formed by the circuit board 300a and the negative electrode end cap 330a is filled, the glue overflows to the second surface of the circuit board 300a to fill the gap between the bottom wall 414a and the inner electrode 340a, as shown in FIG. Fig.33 As shown, a layer of thermal conductive glue 440a is also formed between the bottom wall of the controller outer shell 410a and the inner electrode 340a. The thermal conductive glue 440a can be a thermosetting colloid. The thermal conductive glue can be used to improve the heat dissipation efficiency of the controller 400a, reduce the temperature difference between the inside and outside of the controller 400a, improve the charging and discharging temperature control accuracy of the controller 400a, improve the structural strength of the controller 400a, and achieve the structural sealing of the controller 400a, so that the soft-pack lithium-ion battery 200a is not invalid. The electrolyte is effectively prevented from invading the electric controller 400a. It also improves the adaptability and reliability of the charging and discharging working environment of the rechargeable battery 100a.

[0210] In addition, in order to further prevent the electrolyte from infiltrating into the controller 400a when the soft-pack lithium-ion battery cell 200a leaks, a sealant may be further covered on the thermal conductive adhesive 440c.

[0211] like Fig.34 and Fig.35 As shown, after the structural sealing between the controller outer shell 410a and the circuit board 300a is completed, a controller cover 460a is covered on the annular area of ​​the circuit board 300a that is not covered by the negative electrode end cover 330a.

[0212] The circuit board 300a is made of an epoxy glass fiber copper-clad substrate, and may also be made of a carbon fiber substrate, an aluminum substrate, or a ceramic substrate with good thermal conductivity.

[0213] The charging and / or discharging control circuit formed by the circuit board 300a and the electronic components can also be implemented using the process method of thick film integrated circuits.

[0214] The inner electrode 340a and the third pad 323a of the circuit board 300a are tin-welded, for example, by using a soldering iron tin-welding, hot air tin-welding after spraying solder paste, laser tin-welding after spraying solder paste, and the like.

[0215] like Fig.28 As shown, in the direction of the first surface of the circuit board 300a, the negative electrode end cap welding positioning foot 331a is aligned and inserted into the positioning groove 304a of the second solder pad 322a of the circuit board 300a, so that the negative electrode end cap 330a is installed on the first surface of the circuit board 300a. Fig.28 As shown, the negative electrode end cap welding positioning foot 331a and the second soldering pad 322a of the circuit board 300a are tin-welded on the second surface of the circuit board 300a by using a solder ball laser melting welding process, so that the negative electrode end cap 330a is welded on the second soldering pad 322a of the circuit board 300a to achieve structural fixation and electrical connection, forming as shown in FIG. Fig.28 The controller 400a is shown as controlling the circuit assembly 350a.

[0216] The second soldering pad 322a of the circuit board 300a is electrically connected to the charging input and discharging output terminals of the circuit board 330a. After the negative electrode end cap 330a is welded and fixed to the second soldering pad 322a of the circuit board 300a and an electrical connection is established, the negative electrode end cap 330a becomes the negative electrode of the charging input and discharging output of the rechargeable battery 100a.

[0217] The negative electrode end cap 330a is made by nickel plating after stainless steel molding, so that the negative electrode end cap 330a can be welded to the second pad 323a by a tin melting welding process. The negative electrode end cap 330a can shield the electromagnetic radiation generated by the circuit board; and the negative electrode end cap 330a can conduct and dissipate the heat generated by the control circuit to the outside of the controller 400a; and the structural strength and oxidation resistance of the negative electrode end cap 330a can meet the structural technical requirements of the charging input and discharging output electrodes of the rechargeable battery 100a.

[0218] like Fig.29 The circuit board 300a of the control circuit assembly 350a shown in FIG. Fig.25 The surface of the first solder pad 321a on the second surface of the circuit board 300a is coated with solder paste.

[0219] A limiting boss 415a with an L-shaped axial cross section is provided on the inner side of the cylindrical side wall of the controller housing 410a. Fig.30 In the direction shown, the circuit board 300a of the control circuit assembly 350a is mounted on the limiting boss 415a of the controller housing 410a, as shown in FIG. Fig.31 As shown; the controller housing 410a is directly heated to melt the tin and weld it, so that the first solder pad 321a on the second surface of the circuit board 300a is fixed to the controller housing 410a by melting the tin and welding to establish an electrical connection.

[0220] The first pad 321a of the circuit board 300a is electrically connected to the charge and discharge control circuit ground terminal GND. The first pad 321a of the circuit board 300a is electrically connected to the controller housing 410a through welding, so that the controller housing 410a is electrically connected to the charge and discharge control circuit ground terminal GND.

[0221] In this embodiment, the controller outer shell 410a is made of stainless steel that is formed and then nickel-plated. The first soldering pad 321 of the circuit board 300a can be directly soldered to the controller outer shell 410a using a tin melting soldering process.

[0222] In other embodiments, the controller housing 410 may also be made of conductive metal such as stainless steel or aluminum.

[0223] The first solder pad 321a of the circuit board 300a is coated with solder paste, and can also be achieved by adopting a method of hot-melt tinning (commonly known as tinning or tinning).

[0224] In this embodiment, the axial bottom of the controller outer shell 410a is a planar structure. When the controller outer shell 410a and the battery outer shell 110a are welded and positioned, a shell positioning ring 475a is installed at the bottom of the controller outer shell 410a. The outer diameter of the shell positioning ring 475a is slightly smaller than the outer diameter of the controller outer shell 410a, so that an L-shaped outer positioning groove 411a is formed between the shell positioning ring 475a and the controller outer shell 410a.

[0225] In addition, the controller outer shell 410a may also be provided with a step structure with an L-shaped cross section on the side facing the battery outer shell 110a, thereby forming an external positioning groove. In this case, the controller outer shell 410a may be provided with an insulating layer to isolate the controller outer shell 410a and the inner electrode 340a.

[0226] In this embodiment, the thermal conductive adhesive 440a injected into the controller 400a can conduct the heat generated by the control circuit in the controller 400a to the controller outer shell 410a and the negative electrode end cover 330a. In this way, the heat dissipation efficiency of the controller 400a can be improved, the temperature difference between the inside and outside of the controller 400a can be reduced, the charging and discharging temperature control accuracy of the controller 400a can be improved, the structural strength of the controller 400a can be improved, and the structural sealing of the controller 400a can be achieved.

[0227] like Fig.34 As shown, after the thermal conductive adhesive 440a is injected, transparent light-conducting adhesive can be added to the light-transmitting hole 301a of the circuit board 300a, and the controller cover 460a can be installed on the circuit board 300a. After the light-conducting adhesive is cured, the controller cover 460a is bonded and fixed to the surface of the circuit board 300a at the axial upper part of the controller 400a.

[0228] The controller cover 460a can be made of a transparent or translucent polyurethane material that can conduct light. The plane of the controller cover 460a facing the outside of the controller 400a is coated with ink having reflective and light-shielding properties, which serves as a reflective and light-shielding coating for the controller cover 460a. The controller cover 460a serves as a light-conducting carrier that conducts the light signal emitted by the indicator light 324a to the outside of the controller 400a, and also serves as an upper cover structure of the controller 400a. By designing the thickness of the controller cover 460a, the structure of the negative electrode end cap 330a at the negative electrode end of the rechargeable battery 100a can be a convex platform negative electrode, a platform negative electrode, or a concave platform negative electrode.

[0229] In other embodiments, the controller cover 460a may also be made of materials such as TPU, ABS, PC, PMMA, etc. The reflective and light-shielding coating on one side of the controller cover 460a may also be achieved by pasting paper or film with a light-shielding effect.

[0230] like Figure 3 , Figure 4 , Fig.29 , Fig.32 , Fig.33 , Fig.34 , Fig.35 , Fig.36 As shown, the controller 400a is composed of a control circuit component 350a and a controller outer shell 410a assembled and welded together, a thermal conductive adhesive 440a is poured into the controller 400a, and a controller cover 460a is installed on the surface of the insulating layer 311a of the circuit board 300a of the controller 400a.

[0231] like Fig.26 , Fig. 27 , Fig.28 , Fig.29 As shown, the control circuit assembly 350a is composed of a negative electrode end cap 330a, an inner electrode 340a and a circuit board 300a on which a charging and / or discharging control circuit has been welded. The negative electrode end cap 330a is welded to the second welding pad 322a of the negative electrode of the charging input and discharging output of the charging and / or discharging control circuit of the circuit board 300a, the inner electrode 340a is welded to the third welding pad 323a of the negative electrode 220a of the lithium ion battery cell of the charging and / or discharging control circuit of the circuit board 300a, and the first welding pad 321a of the ground terminal GND of the charging and discharging control circuit of the circuit board 300a is used for welding the controller outer shell 410a.

[0232] like Fig.25 , Fig.30 and Fig.31As shown, a limiting boss 415a with an L-shaped axial cross-section is provided on the inner wall of the axial opening end of the controller housing 410a, which is used to assemble and position the circuit board 300a of the control circuit component 350a, and serves as a welding structure with the first solder pad 321a of the ground terminal GND of the charging and / or discharging control circuit of the circuit board 300a.

[0233] like Fig.35 , Fig.36 As shown, the controller 400a is provided with three structural electrodes, namely, a negative electrode end cap 330a, an inner electrode 340a, and a controller outer shell 410a.

[0234] like Figure 2 , Figure 3 , Fig.25 , Fig.28 , Fig.29 As shown, the negative electrode end cap 330a is welded on the circuit board 300a and electrically connected to the charging input and discharging output of the charging and / or discharging control circuit. The negative electrode end cap 330a exposes the platform structure axially outside the charge and discharge controller 400a, and serves as the negative electrode of the charging input and discharging output of the rechargeable battery 100a in the rechargeable battery 100a system.

[0235] like Figure 3 , Figure 4 , Fig.25 , Fig.26 , Fig. 27 As shown, the inner electrode 340a is welded on the circuit board 300a and electrically connected to the negative electrode 220a access end of the soft-pack lithium-ion battery cell 200a of the charging and / or discharging control circuit. The inner electrode 340a exposes the platform structure at the axial bottom of the charge and discharge controller 400a, and serves as the negative electrode 220a and an electrode for detecting and controlling the charge and discharge of the soft-pack lithium-ion battery cell 200a.

[0236] like Figure 1 , Figure 3 , Fig.25 , Fig.30 , Fig.31 As shown, the controller housing 410a is welded to the circuit board 300a and electrically connected to the charging and / or discharging control circuit ground terminal GND, serving as a common ground electrode electrically connected to the battery housing 110a and the positive electrode 210a of the soft-pack lithium-ion battery cell 200a, and serving as the positive electrode of the charging input and discharging output of the rechargeable battery 100a in the rechargeable battery 100a system.

[0237] If it is necessary to form or test the soft-pack lithium-ion battery cell 200 a after the rechargeable battery 100 a is assembled, the controller 400 a may be used to form and test the soft-pack lithium-ion battery cell 200 a .

[0238] If it is necessary to form and test the soft-pack lithium-ion battery cell 200a across the controller 400a after the rechargeable battery 100a is assembled, the controller cover 460a can be left uninstalled, such as Fig.34 and Fig. 22 As shown, the cell test point 316a provided on the circuit board 300a and electrically connected to the negative electrode 220a of the soft-pack lithium-ion cell is used as the negative electrode 220a of the soft-pack lithium-ion cell 200a to connect to a lithium-ion battery formation tester for formation or testing.

[0239] The controller 400a of this embodiment can achieve the following effects:

[0240] The height of the controller 400a is reduced, and the specific energy of the rechargeable battery 100a can be improved. The structure of the controller 400a is simplified by adopting an integrated system integrated structural design for the control circuit component 350a and the controller outer shell 410a of the controller 400a, and the internal space of the controller 400a is fully utilized, and the height of the controller 400a is reduced, which makes more space for the soft-pack lithium-ion battery cell 200a and increases the battery cell capacity, thereby improving the volume specific energy of the rechargeable battery 100a and improving the adaptability and reliability of the charging and discharging operation of the rechargeable battery 100a.

[0241] By adopting an integrated system integration structure for the control circuit component 350a and the controller outer shell 410a of the controller 400a, the structure and manufacturing process of the controller 400a are simplified, and the material cost and manufacturing cost of the controller 400a are reduced.

[0242] Implementation of the controller 400b corresponding to the aluminum shell lithium ion battery of implementation 2

[0243] Taking the controller 400 b as an example, an implementation of the rechargeable battery 100 b including the aluminum shell lithium ion battery cell 200 b and the controller 400 b is described.

[0244] like Figures 37 to 41 As shown, the controller 400b includes a circuit board 300b, a negative electrode end cap 330b, an inner electrode 340b and a controller outer shell 410b.

[0245] The circuit board 300b is provided with a first surface and a second surface corresponding to each other. Fig.39 The first surface of the circuit board 300b is shown. Fig.37The second surface of the circuit board 300b is shown. The first surface and the second surface of the circuit board 300b are respectively welded with electronic components constituting the charging and / or discharging control circuit. The circuit board 300a is provided with a first pad 321b (i.e., the outer shell pad), a second pad 322b (i.e., the negative electrode end cap pad) and a third pad 323b (i.e., the inner electrode pad). The electronic components of the charging and / or discharging control circuit of the circuit board 300b are soldered by chip soldering, which is realized by double-sided PCB board patch and hot air reflow soldering process.

[0246] like Fig.37 and Fig.38 As shown, the inner electrode 340b is arranged on the second surface of the circuit board 300b, and the inner electrode 340b is electrically connected to the circuit board 300b. The inner electrode 340b includes an inner electrode welding positioning foot 341b and an inner electrode contact platform 342b, and the inner electrode welding positioning foot 341b and the inner electrode contact platform 342b form a strip structure. The inner electrode contact platform 342b is integrally formed with the inner electrode welding positioning foot 341b, and the inner electrode contact platform 342b can be elastically bent relative to the inner electrode welding positioning foot 341b. The inner electrode contact platform 342b includes a first bending portion 3421b and a second bending portion 3422b folded with each other, and the second bending portion 3422b is superimposed below the first bending portion 3421b. The second bending portion 3422b includes an inner electrode contact area whose outer contour is circular or polygonal.

[0247] The inner electrode welding positioning foot 341b includes a positioning foot base 3411b connected to the inner electrode contact platform 342b and a positioning foot welding part 3412b arranged at one end of the positioning foot base 3411b. The positioning foot welding part 3412b includes two mutually spaced plug pins 3413b formed on the positioning foot base 3411b and insertable into the circuit board 300b, and a flat welding foot 3414b formed between the two plug pins 3413b and flatly attached to the surface of the circuit board 300b. The flat welding foot 3414b is in a fork shape, and the positioning foot base 3411b is in a step shape.

[0248] A third soldering pad 323b is provided on the circuit board 300b for soldering the inner electrode 340b. The two pins 3413b of the inner electrode 340b are inserted into the two positioning holes 305b. The flat soldering feet 3414b are flatly attached to the third soldering pad 323b and soldered thereto.

[0249] like Fig.42 As shown, the inner electrode 340b is in a long strip shape. When the controller 400b is sealed and packaged, the inner electrode 340b is not folded but in an extended state. Fig.43 and Fig.44As shown, when the controller 400b is sealed and packaged, a layer of thermal conductive adhesive 440b is formed on the second surface of the circuit board 300b, and at this time, the inner electrode contact platform 342b is superimposed on the thermal conductive adhesive 440b.

[0250] The inner electrode 340b is in a strip shape, but is not limited thereto. In other embodiments, the inner electrode may also be in other shapes, such as Fig.45 and Fig.46 As shown, the inner electrode 340d includes an inner electrode contact platform 342d parallel to the circuit board and an inner electrode welding positioning foot 341d connected to the inner electrode contact platform 342d, and the inner electrode welding positioning foot 341d is fixed on the circuit board 300d and electrically connected to the circuit board 300d. An accommodation space for arranging circuit components is formed between the inner electrode contact platform 342d and the circuit board 300d. In other words, the inner electrode contact platform 342d has a certain height, and some components can be accommodated under the inner electrode contact platform 342d.

[0251] A convex edge 343d perpendicular to the inner electrode contact platform 342d is integrally formed on the periphery of the inner electrode contact platform 342d, and the inner electrode welding positioning foot 341d is indirectly connected to the inner electrode contact platform 342d via the convex edge 343d.

[0252] A rivet hole 345d is provided at the center of the inner electrode contact platform 342d, and an annular flange 344d is provided around the edge of the rivet hole 345d and extends perpendicularly to the inner electrode contact platform 342d toward the circuit board 300b. Fig.14 , Fig.15 As shown, the aluminum shell lithium ion battery 200b of the aluminum shell lithium ion battery includes an aluminum shell lithium ion battery core 201b and a battery cap 230b, and the battery cap 230b is arranged at the open end of the battery outer shell 110b and closes the opening of the battery outer shell 110b. The lead-out electrode 232b of the battery cap 230b is inserted into the riveting hole 345d of the inner electrode contact platform 342d, and the flange 344d of the inner electrode contact platform 342d contacts the lead-out electrode 232b to achieve electrical connection.

[0253] The number of the inner electrode welding positioning pins 341d is two, which are the first positioning pin (i.e. Fig.45 The left positioning foot) and the second positioning foot (i.e. Fig.45 The first positioning foot and the second positioning foot both include: a positioning foot base 3411d connected to the internal electrode contact platform 342d and a positioning foot welding portion 3412d formed at one end of the positioning foot base 3411d for welding connection to the circuit board 300b, wherein the width of the positioning foot base 3411d of the first positioning foot is greater than the width of the positioning foot base 3411d of the second positioning foot.

[0254] The first positioning foot welding part 3412d includes: two mutually spaced pins 3414d formed on the first positioning foot base 3411d and insertable into the circuit board 300b, and a flat soldering foot 3413d formed between the two pins 3414a and flat against the surface of the circuit board 300b. The flat soldering foot 3413d is forked. Correspondingly, the circuit board 300b is also provided with a corresponding soldering pad for soldering the inner electrode 340d.

[0255] The positioning foot bases 3411d of the first positioning foot and the second positioning foot are formed by bending and extending the corresponding inner electrode contact platform 342d in an integral manner, so that the positioning foot bases 3411d are step-shaped.

[0256] In addition, Fig.45 In the figure, the number of the inner electrode welding positioning pins 341d of the inner electrode 340d is two, but it is not limited thereto. The number of the inner electrode welding positioning pins can be changed according to actual applications, that is, it can also be 1 or more than 3.

[0257] As described above, the inner electrode provided in the controller 400b of the aluminum shell lithium ion battery can be Fig.40 The inner electrode of the single-leg strip shown in FIG. 1 may also be Fig.45 The inner electrode has a riveting hole in the middle. Of course, the structural shape of the inner electrode of the controller 400b can also be other structures that can be changed according to actual applications.

[0258] The third pad 323b of the circuit board 300b is electrically connected to the access end of the negative electrode 220b of the aluminum shell lithium ion battery 200b of the charging and / or discharging control circuit, and the inner electrode 340b is electrically connected to the third pad 323b of the circuit board 300b by welding, so that the inner electrode 340b becomes a structural electrode for the negative electrode 220b of the aluminum shell lithium ion battery 200b to access the charging and / or discharging control circuit. The inner electrode 340b and the third pad 323b of the circuit board 300b can be welded by tin melting, for example, by using a soldering iron tin melting welding, hot air tin melting welding after spraying solder paste, laser tin melting welding after spraying solder paste, and the like.

[0259] The inner electrode 340b is made of metal nickel by stamping. The inner electrode 340b can be welded to the third pad 323b by a tin melting welding process, or can be welded to the negative electrode 220b of the aluminum shell lithium ion battery 200b by a resistance welding or laser welding process. The negative electrode 220b is made of metal nickel.

[0260] like Figure 39 to Figure 41As shown, the negative electrode end cap 330b is made of a metal conductive material and is electrically connected to the circuit board 300b. The negative electrode end cap 330b includes a circular negative electrode end cap plate 332b and a cap wall 333b surrounding the negative electrode end cap plate 332b. The negative electrode end cap plate 332b and the cap wall 333b constitute a cap body with a bottom opening, which is inverted on the first surface of the circuit board 300b. The cap body is in close contact with the circuit board 300b in the circumference, and some or all of the circuit components on the first surface are encapsulated in the inner cavity of the cap body.

[0261] The negative electrode end cap 330b is closed except for the bottom opening, that is, the negative electrode end cap 330b covers part or all of the components on the first surface of the circuit board 300b, thereby being able to play an electromagnetic shielding role for the internal components. The circuit board 300b is a circular circuit board, and the negative electrode end cap 330b covers the middle area of ​​the first surface of the circuit board 300b. The cap wall 333b extends integrally along the axial direction to form at least two spaced negative electrode end cap welding positioning feet 331b. The circuit board 300b is provided with a positioning groove 304b for the negative electrode end cap welding positioning feet 331b to be inserted, and the negative electrode end cap 330b is electrically connected to the circuit board 300b through the negative electrode end cap welding positioning feet 331b. A long strip of tin guide groove 3311b is provided at the end of the negative electrode end cap welding positioning foot 331b. The outline of the tin guide groove 3311b is arch-shaped, so that the end of the negative electrode end cap welding positioning foot 331b is forked.

[0262] like Fig.37 As shown, a second soldering pad 322b is disposed on the second surface of the circuit board 300b and around the positioning groove 304b. The second soldering pad 322b is used for soldering the negative electrode terminal cap welding positioning foot 331b.

[0263] like Fig.39 As shown, in the direction of the first surface of the circuit board 300b, the negative electrode end cap welding positioning foot 331b is aligned and inserted into the positioning groove 304b of the second solder pad 322b of the circuit board 300b, so that the negative electrode end cap 330b is installed on the first surface of the circuit board 300b, forming a Fig.41 The control circuit assembly 350b shown in the figure adopts the solder ball laser melting soldering method to melt solder the negative electrode end cap welding positioning foot 331b and the second soldering pad 322b of the circuit board 300b on the second surface of the circuit board 300b, so that the negative electrode end cap 330b is welded on the second soldering pad 322b of the circuit board 300b to achieve structural fixation and electrical connection.

[0264] The second soldering pad 322b of the circuit board 300b is electrically connected to the charging input and discharging output of the charging and / or discharging control circuit. After the negative electrode end cap 330b is welded and fixed to the second soldering pad 322b of the circuit board 300b and an electrical connection is established, the negative electrode end cap 330b becomes the negative electrode of the charging input and discharging output of the rechargeable battery 100b.

[0265] The negative electrode end cap 330b is made by nickel plating after stainless steel molding, so that the negative electrode end cap 330b can be welded to the second pad 323b by a tin melting welding process. The negative electrode end cap 330b covers the components inside, which can shield the electromagnetic radiation generated by the charging and / or discharging control circuit. The negative electrode end cap 330b can also conduct the heat generated by the charging and / or discharging control circuit to the outside of the controller 400b to dissipate the heat. In this way, the structural strength and oxidation resistance of the negative electrode end cap 330b meet the structural technical requirements of the charging input and discharging output electrodes of the rechargeable battery 100b.

[0266] The negative electrode end cap 330b can also be stamped and formed by other conductive metal materials such as copper, iron, nickel, etc. The negative electrode end cap 330b and the circuit board 300b can be welded by tin melting, for example, by using electric soldering iron tin melting welding, hot air tin melting welding after spraying tin paste, laser tin melting welding after spraying tin paste, tin melting welding, etc.

[0267] The controller housing 410b can be made of aluminum material that is formed and nickel-plated, meeting the process conditions of using tin melting welding to weld with the first pad 321b of the circuit board 300b, and meeting the process conditions of using laser welding to weld with the battery housing 110b. The first pad 321b of the circuit board 300b can be directly welded to the controller housing 410b using the tin melting welding process.

[0268] like Fig.41 and Fig.42 As shown, the circuit board assembly 350b is welded with the controller housing assembly 430b. The controller housing 410b is provided with an inner cavity. The circuit board 300b is accommodated in the inner cavity, and the controller housing 410b is electrically connected to the circuit board 300b. The first surface of the circuit board 300b faces the top of the controller housing 410b, and the negative electrode end cap 330b protrudes from the top opening of the controller housing 410b. The second surface of the circuit board 300b faces the bottom of the controller housing 410b, and a through hole is provided at the bottom of the controller housing 410b, and the inner electrode 340b is exposed through the through hole to be electrically connected to the negative electrode 220b of the aluminum shell lithium ion battery 200b.

[0269] The controller housing 410b includes a cylindrical side wall 413b and a bottom wall 414b. The other end of the controller housing 410b opposite to the bottom wall 414b is a cylindrical open end. The circuit board 300a is suspended in the inner cavity surrounded by the side wall 413b. Among them, the side wall 413b can be cylindrical or square. A limiting boss 415b formed of a conductive metal material is protrudingly provided on the inner surface of the side wall 413b. The limiting boss 415b is an annular platform protruding from the inner surface of the side wall 413b, and the annular platform has an annular support plane protruding from the inner surface of the side wall 413b for supporting the circuit board. The support plane and the side wall 413b form an annular inner positioning groove 412b with an L-shaped axial cross section. A through hole is provided in the center of the bottom wall 414b, and the inner electrode contact platform 342b is exposed to the outside of the controller housing 410b through the through hole. The periphery of the circuit board 300b is mounted on the limiting boss 415b, and a first pad 321b (ie, a pad of the outer shell) for conductively welding the limiting boss 415b is provided at the position where the circuit board 300b contacts the limiting boss 415b.

[0270] Combination Fig.37 As shown, the first pad 321b is a plurality of discrete pads arranged at intervals and distributed around the edge of the circuit board 300b, and the edge line of each discrete pad is in an arc shape that is arched inward toward the center of the circuit board 300b. Of course, in other embodiments, the edge line of each discrete pad may also be in an arc shape that is arched outward away from the center of the circuit board 300b.

[0271] In this embodiment, the first pads 321b are discontinuous pads, but the present invention is not limited thereto. The first pads 321b may also be interconnected to form a circle at the edge of the circuit board 300b (eg, Fig.49 The first solder pad 321c is shown.

[0272] In this embodiment, the limiting boss 415b in the side wall 413b of the controller outer shell 410b is a continuous annular boss, but is not limited to this. The limiting boss 415b can be composed of a plurality of protrusions on the side wall 413b spaced apart, each protrusion having a supporting surface at the same height, and the circuit board is mounted and fixed on the supporting surface.

[0273] The circuit board 300b is further provided with a battery cell test point 316b. The edge area of ​​the circuit board 300b not covered by the negative electrode end cover 330b is covered with an insulating layer 311b, and the battery cell test point 316b exposes the insulating layer 311b.

[0274] like Fig.43 and Fig.44As shown, the circuit board 300b is welded to the limiting boss 415b on the controller housing 410b. After the circuit board 300b and the controller housing 410b are assembled, glue is injected through the glue injection hole 302b, and the glue fills the cavity formed by the side wall 413b, the bottom wall 414b of the controller housing 410b and the second surface of the circuit board 300b. The exhaust overflow hole 303b exhausts the gas during the pouring process of the thermal conductive glue 440b, and after the cavity formed by the circuit board 300b and the negative electrode end cap 330b is filled, the gas overflows to the second surface of the circuit board 300b to fill the area on the second surface of the circuit board 300b surrounded by the bottom wall 414b, as shown in FIG. Fig.44 As shown, a thermal conductive adhesive 440b is formed in the area where the through hole of the bottom wall 414b is located to seal the components on the second surface of the circuit board 300b.

[0275] like Fig.46 As shown, after the structural sealing between the controller housing 410b and the circuit board 300b is completed, a controller cover plate 460b is covered on the annular area of ​​the circuit board 300b not covered by the negative electrode end cover 330b, and the controller cover plate 460b is covered on the insulating layer 311b of the circuit board 300a. One side of the controller cover plate 460b is coated with a self-adhesive.

[0276] like Fig.47 As shown, the thickness of the controller cover 460b is equal to the height of the negative electrode end cover 330b exposed from the circuit board 300b, forming a platform-type negative electrode structure.

[0277] The controller cover 460b is made of insulating material and can serve as an upper cover structure of the controller 400b.

[0278] Before installing the controller cover 460b, the controller 400b has completed structural sealing packaging. The controller cover 460b does not belong to the sealing structure component of the controller 400b. In the event that the controller cover 460b is damaged, the sealing structure of the controller 400b is not affected.

[0279] In addition, by adjusting the thickness of the controller cover 460b, the structure of the negative electrode end cap 330b at the negative electrode end of the rechargeable battery 100b can be a convex platform type negative electrode, a platform type negative electrode, or a concave platform type negative electrode.

[0280] like Fig.47As shown, an inner positioning groove 412b with an L-shaped axial cross section is provided on the inner side wall 413b of the axial opening end of the controller housing 410b, which is used for welding the circuit board 300b of the control circuit assembly 350b and serves as a welding structure between the controller housing 410b and the first soldering pad 321b of the circuit board 300b. The surface of the first soldering pad 321b on the second surface of the circuit board 300b is coated with solder paste. The controller housing 410b is directly heated and tin-melted to weld, so that the first soldering pad 321b on the second surface of the circuit board 300b and the controller housing 410b are fixed and electrically connected by tin-melting welding.

[0281] like Fig.47 As shown, at the junction of the axial outer cylindrical surface of the controller outer shell 410b and the bottom plane (i.e., the outer peripheral edge of the bottom surface of the side wall 413b), an annular outer positioning groove 411b with an L-shaped axial cross-section is provided, which serves as an assembly positioning and welding structure for the controller 400b and the battery outer shell 110b.

[0282] The first solder pad 321b of the circuit board 300b is electrically connected to the charging and / or discharging control circuit ground terminal GND, and the first solder pad 321b of the circuit board 300b is electrically connected to the controller housing 410b through welding, so that the controller housing 410b is electrically connected to the charging and / or discharging control circuit ground terminal GND.

[0283] A heat conductive adhesive 440b is poured into the controller 400b to transfer the heat generated by the control circuit in the controller 400b to the controller outer shell 410b and the negative electrode end cap 330b, so as to improve the heat dissipation efficiency of the controller 400b, reduce the temperature difference between the inside and outside of the controller 400b, improve the charge and discharge temperature control accuracy of the controller 400b, improve the structural strength of the controller 400b, and realize the structural sealing of the controller 400b. The heat conductive adhesive can be a thermosetting colloid.

[0284] like Fig.47 , Fig.48 As shown, the controller 400b is provided with three structural electrodes, namely, a negative electrode end cap 330b, an inner electrode 340b, and a controller outer shell 410b.

[0285] like Figures 10 to 12 As shown, the bottom surface of the controller 400b facing the aluminum shell lithium ion battery 200b is also provided with an insulating layer 470b, and the insulating layer 470b is annular, and its inner diameter is less than or equal to the through hole diameter of the controller outer shell 410b, and its outer diameter is less than the diameter of the inner cavity surrounded by the side wall of the controller outer shell 410b. The controller 400b is installed at one end of the aluminum shell lithium ion battery 200b, so that the controller outer shell 410b is welded and connected to the battery outer shell 110a, and the top edge of the battery outer shell 110a cooperates with the annular outer positioning groove 411b to achieve positioning.

[0286] In addition, the bottom of the controller 400b may not form an annular external positioning groove 411b. The bottom may be a flat surface, which may be covered with a layer of insulating shell positioning ring. The outer diameter of the shell positioning ring is smaller than the outer diameter of the bottom wall 413b of the controller outer shell 410b, so that the controller outer shell 410b and the outer peripheral edge wall of the shell positioning ring form an annular external positioning groove with an L-shaped cross-section.

[0287] like Fig.47 and Fig.48 As shown, the negative electrode end cap 330b is welded on the circuit board 300b and electrically connected to the charging input and discharging output of the charging and / or discharging control circuit. The negative electrode end cap 330b exposes the platform structure of the controller 400b axially outside and can be used as the negative electrode of the charging input and discharging output of the rechargeable battery 100b. The inner electrode 340b is welded on the circuit board 300b and electrically connected to the negative electrode access end of the aluminum shell lithium ion battery 200b of the charging and / or discharging control circuit. The inner electrode 340b exposes the welding piece structure of the axial bottom of the controller 400b and serves as an electrode for electrically connecting the negative electrode 220b and detecting and controlling the charging and discharging of the aluminum shell lithium ion battery 200b.

[0288] The controller housing 410b is welded to the circuit board 300b and electrically connected to the charging and / or discharging control circuit ground terminal GND, serving as a common ground electrode electrically connected to the battery housing 110b and the lithium-ion battery cell positive electrode 210b, and serving as the positive electrode for the charging input and discharging output of the rechargeable battery 100b.

[0289] If it is necessary to form or test the aluminum shell lithium ion battery cell 200b after the rechargeable battery 100b is assembled, the aluminum shell lithium ion battery cell 200b can be formed and tested by the controller 400b;

[0290] If it is necessary to form and test the aluminum shell lithium ion battery cell 200b across the controller 400b after the rechargeable battery 100b is assembled, the controller cover 460b can be installed without installing the controller cover 460b. Fig.46 Shown and see Fig.23 The cell test point 316b electrically connected to the negative electrode 220b of the lithium-ion cell on the circuit board 300b is used as a test point for connecting the negative electrode 220b to the aluminum shell lithium-ion battery formation tester for formation or detection.

[0291] In the abnormal state of leakage of the aluminum shell lithium ion battery 200b, the thermal conductive glue 440b can effectively prevent the electrolyte from invading the controller 400b before the aluminum shell lithium ion battery 200b fails, and it is not necessary to inject the sealant used to prevent the electrolyte from invading the controller 400b for a long time. If it is necessary to further prevent the electrolyte from invading the controller 400b when the aluminum shell lithium ion battery 200b leaks, the sealant can be injected into the controller 400b after injecting the thermal conductive glue 440c, and the controller 400b can be sealed again.

[0292] The circuit components are formed on the first surface and the second surface of the circuit board 300b, respectively, and the components on the first surface are accommodated in the negative electrode end cap 340b. The inner electrode 340b is arranged on the second surface of the circuit board 300b for connecting to the negative electrode of the aluminum shell lithium ion battery cell. Therefore, the structure of the controller 400b is simplified, the material cost and manufacturing cost of the controller 400b are reduced, the components or devices on the circuit board 300b are arranged compactly, the internal space of the controller 400b is fully utilized, the height of the controller 400b is reduced, and more space is made for the aluminum shell lithium ion battery cell, the battery cell capacity is increased, and the volume energy ratio of the rechargeable battery 100b is increased.

[0293] Implementation of the controller 400c corresponding to the direct-sealed lithium-ion battery of implementation 3

[0294] Taking the controller 400 c as an example, an embodiment of a rechargeable battery 100 c including a direct-sealed lithium-ion battery cell 200 c and a controller 400 c is described.

[0295] A direct-sealed lithium-ion battery refers to a rechargeable battery that uses a battery outer shell and a controller outer shell to directly package a direct-sealed lithium-ion cell filled with electrolyte.

[0296] Since the controller housing 410c is electrically connected to the positive electrode 210c of the direct-sealed lithium-ion battery cell through the battery housing 110c to package the direct-sealed lithium-ion battery cell, the controller housing is not allowed to be welded to the circuit board by nickel plating. Therefore, in this embodiment, a circuit board bracket formed of metal aluminum material and manufactured by nickel plating is introduced into the controller housing to achieve the connection. The specific structure of the controller is described as follows.

[0297] like Figures 49 to 53 The controller 400c includes a circuit board 300c, a negative electrode end cap 330c, an inner electrode 340c and a controller outer shell 410c.

[0298] The circuit board 300c is provided with a first surface and a second surface corresponding to each other. Fig.51 The first surface of the circuit board 300c is shown. Fig.49The second surface of the circuit board 300c is shown. The electronic components constituting the charging and / or discharging control circuit are respectively welded on the first surface and the second surface of the circuit board 300c. The circuit board 300c is provided with a first pad 321c (i.e., the outer shell pad), a second pad 322c (i.e., the negative electrode end cap pad) and a third pad 323c (i.e., the inner electrode pad). The electronic components of the charging and / or discharging control circuit of the circuit board 300c are soldered by chip soldering, which is realized by the process method of double-sided PCB board chip soldering and hot air reflow soldering.

[0299] like Fig.49 and Fig.50 As shown, the inner electrode 340c is arranged on the second surface of the circuit board 300c, and the inner electrode 340c is electrically connected to the circuit board 300c. The inner electrode 340c includes an inner electrode contact platform 342c parallel to the circuit board and an inner electrode welding positioning foot 341c connected to the inner electrode contact platform 342c, and the inner electrode welding positioning foot 341c is fixed on the circuit board 300c and electrically connected to the circuit board 300c. An accommodating space for arranging circuit components is formed between the inner electrode contact platform 342c and the circuit board 300c. In other words, the inner electrode contact platform 342c has a certain height, and some components can be accommodated inside the inner electrode contact platform 342c.

[0300] A convex edge 343c perpendicular to the inner electrode contact platform 342c is integrally formed on the periphery of the inner electrode contact platform 342c, and the inner electrode welding positioning foot 341c is indirectly connected to the inner electrode contact platform 342c via the convex edge 343c.

[0301] There are two inner electrode welding positioning pins 341c, which are the first positioning pin (i.e. Fig.49 The left positioning foot) and the second positioning foot (i.e. Fig.49 The first positioning foot and the second positioning foot both include: a positioning foot base 3411c connected to the internal electrode contact platform 342c and a positioning foot welding portion 3412c formed at one end of the positioning foot base 3411c for welding connection to the circuit board 300c, wherein the width of the positioning foot base 3411c of the first positioning foot is greater than the width of the positioning foot base 3411c of the second positioning foot.

[0302] The positioning foot welding part 3412c of the first positioning foot includes: two mutually spaced pins 3414c formed on the positioning foot base 3411c of the first positioning foot and insertable into the circuit board 300c, and a flat soldering foot 3413c formed between the two pins 3414c and flatly attached to the surface of the circuit board 300c. The flat soldering foot 3413c is in a fork-like shape. The circuit board 300c is provided with positioning holes 305c for each pin 3414c to be inserted, and a first third soldering pad 323c (i.e., inner electrode soldering pad) for the flat soldering foot 3413c to be flatly attached thereto and soldered thereto. The third soldering pad 323c (i.e., Fig.49 The third solder pad 323c on the left side of the center) covers the periphery of the positioning hole 305c. The pin pin 3414c and the flat solder pin 3413c of the first positioning pin share the same solder pad. The positioning pin welding portion 3412c of the second positioning pin is a pin pin 3415c formed on the positioning pin base 3411c of the second positioning pin. The positioning pin welding portion 3412c of the second positioning pin is connected to the second third solder pad 323c (i.e. Fig.49 The third pad 323c on the right side is soldered and connected.

[0303] The positioning foot bases 3411c of the first positioning foot and the second positioning foot are formed by integrally bending and extending the corresponding inner electrode contact platform 342c, so that the positioning foot bases 3411c are step-shaped.

[0304] exist Fig.49 In the embodiment, the inner electrode 340c is provided with a convex edge 343c, and the convex edge 343c and the inner electrode contact platform 342c form a cylindrical cover body, covering some components. However, it is not limited to this, and the inner electrode 340c may also be provided with no convex edge 343c, that is, the inner electrode 340c includes the inner electrode contact platform 342c and two inner electrode welding positioning feet 341c connected to the inner electrode contact platform 342c. Since the inner electrode positioning feet 341c extend from the inner electrode contact platform 342c and have a certain height, the inner electrode 340c may also cover some components without the convex edge 343c.

[0305] In addition, in the present embodiment, the inner electrode 340c has two inner electrode welding positioning pins 341c, but it is not limited thereto. The number of the inner electrode welding positioning pins can be changed according to actual applications, that is, it can also be 1 or more than 3.

[0306] The inner electrode 340c is made of nickel stamping and can be soldered to the third pad 323c of the circuit board 300c by tin melting, for example, soldering with an electric soldering iron, hot air soldering after solder paste spraying, laser soldering after solder paste spraying, and the like.

[0307] The inner electrode 340c can be welded to the negative electrode 220c of the direct-sealed lithium-ion battery cell 200c by resistance welding or laser welding.

[0308] The third welding pad 323c of the circuit board 300c is electrically connected to the negative electrode access terminal of the direct-sealed lithium-ion battery cell of the charging and / or discharging control circuit, and the inner electrode 340c is electrically connected to the third welding pad 323c of the circuit board 300c by welding, so that the inner electrode 340c becomes a structural electrode for the negative electrode 220c to access the charging and / or discharging control circuit.

[0309] like Fig.51 and Fig.52 As shown, the negative electrode end cap 330c is made of a metal conductive material and is electrically connected to the circuit board 300c. The negative electrode end cap 330c includes a circular negative electrode end cap plate 332c and a cap wall 333c arranged around the negative electrode cap plate 332c. The negative electrode end cap plate 332a and the cap wall 333c constitute a cap body with a bottom opening, one end of the cap body is open and the other end is closed. The cap body is inverted on the first surface of the circuit board 300c. The cap body is in close contact with the first surface of the circuit board 300c around the circumference to form a closed body covering the first surface of the circuit board 300c, and some or all of the circuit components on the first surface are encapsulated in the inner cavity of the cap body.

[0310] The negative electrode end cap 330c is closed except for the bottom opening, that is, the negative electrode end cap 330c covers part or all of the components on the first surface of the circuit board 300c, thereby being able to play an electromagnetic shielding role for the internal components. The circuit board 300c is a circular circuit board, and the negative electrode end cap 330c covers the middle area of ​​the first surface of the circuit board 300c. The cap wall 333c extends integrally along the axial direction to form at least two spaced negative electrode end cap welding positioning feet 331c. The circuit board 300c is provided with a positioning groove 304c for the negative electrode end cap welding positioning feet 331c to be inserted, and the negative electrode end cap 330c is electrically connected to the circuit board 300c through the negative electrode end cap welding positioning feet 331c. A long strip of tin guide groove 3311c is provided at the end of the negative electrode end cap welding positioning foot 331c. The outline of the tin guide groove 3311c is arch-shaped, so that the end of the negative electrode end cap welding positioning foot 331c is forked.

[0311] like Fig.49 As shown, a second soldering pad 322c is disposed on the second surface of the circuit board 300c, and the second soldering pad 322c is used to solder the negative electrode terminal cap welding positioning foot 331c. The second soldering pad 322c surrounds the periphery of the positioning groove 304c.

[0312] The negative electrode end cap 330c can be manufactured by a method of nickel plating after stainless steel molding, and the negative electrode end cap 330c is fixed on the first surface of the circuit board 300c by a solder ball laser melting welding process. The negative electrode end cap 330c can also be made of other conductive metal materials such as copper, iron, nickel, etc., and the negative electrode end cap 330c and the circuit board 300c are welded by a tin melting method, for example, electric iron melting welding, hot air melting welding after spraying solder paste, laser melting welding after spraying solder paste, melting welding, etc.

[0313] The second soldering pad 322c of the circuit board 300c is electrically connected to the charging input and discharging output of the charging and / or discharging control circuit. After the negative electrode end cap 330c is welded and fixed to the second soldering pad 322c of the circuit board 300c and an electrical connection is established, the negative electrode end cap 330c becomes the negative electrode of the charging input and discharging output of the rechargeable battery 100c.

[0314] The negative electrode end cap 330c covers the components and circuit connections on the first surface inside, so that the negative electrode end cap 330c can shield the electromagnetic radiation generated by the charging and / or discharging control circuit, and the negative electrode end cap 330c can conduct the heat generated by the charging and / or discharging control circuit to the outside of the controller 400c. In addition, the structural strength and oxidation resistance of the negative electrode end cap 330a also meet the structural technical requirements of the charging input and discharging output electrodes of the rechargeable battery 100c.

[0315] like Fig.53 , Fig.54 As shown, the controller housing assembly 430c includes a controller housing 410c and a circuit board bracket 420c. The controller housing 410c is provided with an inner cavity. The circuit board 300c is accommodated in the inner cavity, and the controller housing 410c is electrically connected to the circuit board 300c. The first surface of the circuit board 300c faces the top of the controller housing 410c, and the negative electrode end cap 330c protrudes from the top opening of the controller housing 410c. The second surface of the circuit board 300c faces the bottom of the controller housing 410c, and a through hole is provided at the bottom of the controller housing 410c, and the inner electrode 340c is exposed through the through hole to be electrically connected to the negative electrode 220c of the direct-sealed lithium-ion battery cell 200c.

[0316] The controller housing 410c includes a cylindrical side wall 413c and a bottom wall 414c, and the circuit board 300c is suspended in the inner cavity surrounded by the side wall. The side wall 413c can be a square tube or a cylindrical tube. A through hole is provided in the center of the bottom wall 414c, and the inner electrode contact platform 342c is exposed to the outside of the controller housing 410c through the through hole, and there is a gap between the edge of the inner electrode contact platform 342c and the edge of the through hole.

[0317] A circuit board bracket 420c is also provided in the inner cavity of the controller outer shell 410c. The circuit board bracket 420c includes an annular bracket side wall 421c attached to the inner surface of the side wall 413c of the controller outer shell 410c and an annular flat bottom 422c formed at one end of the bracket side wall 421c and attached to the inner surface of the bottom wall 414c of the controller outer shell 410c. The through hole in the center of the flat bottom 422c is not smaller than the through hole on the bottom wall 414c of the controller outer shell 410c, and the bracket side wall 421c is provided with a plurality of welding holes 423c for welding the side wall 413c of the controller outer shell 410c. The top surface of the bracket side wall 421c constitutes an annular limiting boss. When the circuit board 300c is mounted on the limiting boss, the first surface of the circuit board 300c is flush with the end surface of the open end of the controller outer shell 410c. Fig.54 As shown, the circuit board bracket 420c is arranged along the side wall of the controller outer shell 410c and has a supporting plane protruding from the side wall 413c. The supporting plane and the side wall 413c form an annular inner positioning groove 412c with an L-shaped axial section.

[0318] The circuit board bracket 420c is made of nickel-plated aluminum and can be welded to the controller housing 410c by laser welding and to the first solder pad 321c on the second surface of the circuit board 300c by tin melting welding. The circuit board bracket 420c can also be made of other conductive metal materials with surface treatment.

[0319] The controller outer shell 410c is made of metal aluminum and can be welded to the battery outer shell 110c made of metal aluminum by laser welding.

[0320] like Fig.54 As shown, the periphery of the circuit board 300c is mounted on the inner positioning groove 412c, and a first pad 321c (ie, an outer shell pad) for conductively welding the inner positioning groove 412c is provided at the position where the circuit board 300c contacts the inner positioning groove 412c.

[0321] Combination Fig.49 As shown, the first pad 321c is a continuous pad distributed along the edge of the circuit board 300c, and the edge line of the first pad 321c is composed of multiple arc segments and connected to form a circle on the circuit board 300c, and the edge line is lace-shaped. Each arc segment is an arc that is arched inward toward the center of the circuit board 300c or an arc that is arched outward away from the center of the circuit board 300c.

[0322] In this embodiment, the first pad 321c is a continuous pad, but is not limited thereto. The first pad 321c may also be composed of a plurality of pads that are spaced apart from each other and are not connected.

[0323] like Fig.54As shown, an annular outer positioning groove 411c with an L-shaped axial cross section is provided on the bottom edge of the bottom wall 414c of the controller outer shell 410c, and the outer positioning groove 411c is used for welding the battery outer shell 110c.

[0324] Combination Fig.51 and Fig.55 As shown, the annular area of ​​the first surface of the circuit board 300c not covered by the negative electrode end cap 330c is also provided with an indicator pad, and the indicator 324c is directly soldered on the indicator pad on the first surface of the circuit board 300c. The indicator is used to indicate the charge and discharge status of the battery, and it can be an ultra-thin package indicator. The indicator can be a sheet-shaped LED lamp.

[0325] like Fig.60 As shown, a controller cover 460c is also arranged in the annular area of ​​the first surface of the circuit board 300c that is not covered by the negative electrode end cap 330c. The controller cover 460c is made of a light-guiding transparent or translucent polyurethane material, and the controller cover 460c can also be made of materials such as TPU, ABS, PC, PMMA, etc. The light signal emitted by the indicator light 324c does not pass through the packaging structure of the controller 400c, but directly enters the controller cover 460c. A side of the controller cover 460c that is in contact with the circuit board 300c is provided with a space-avoiding groove for accommodating the indicator light. The controller cover 460c is annular, and its size is just enough to cover the annular area that is not covered by the negative electrode end cap 330c.

[0326] The side of the controller cover 460c facing away from the circuit board 300c is also covered with a cover shading sheet 490c or coated with a cover shading layer. The cover shading sheet 490c is made of non-metallic or metallic material, coated with a shading material, and is annular in shape, and the size can be the same as that of the controller cover 460c. The first surface of the circuit board 300c is coated with a reflective and insulating insulating layer 311c to enhance the reflection of the light signal of the controller cover 460c. The insulating layer 311c and the solder resist ink coated on the first surface of the circuit board 300c together form electrical insulation between the circuit board 300c and the negative electrode end cover 330c. In this way, the light emitted by the indicator light 324c cannot be emitted from the upper and lower surfaces, but can only be emitted from the outer peripheral side wall of the controller cover 460c, so that the outer peripheral side wall of the controller cover 460c forms an annular luminous surface.

[0327] A transparent light-conducting adhesive is coated on the surface of the insulating layer 311c of the circuit board 300c, and the controller cover 460c is installed on the circuit board 300c. After the light-conducting adhesive is cured, the controller cover 460c is bonded and fixed to the surface of the circuit board 300c at the axial upper part of the controller 400c.

[0328] The thickness of the controller cover 460c and the cover light shielding sheet 490c can be designed according to the actual application. By adjusting the thickness of the controller cover 460c and the cover light shielding sheet 490c, the structure of the negative electrode end of the rechargeable battery 100c can be a convex platform negative electrode, a platform negative electrode, or a concave platform negative electrode. Fig.61 As shown, the sum of the thicknesses of the controller cover 460c and the cover light shielding sheet 490c is greater than the height of the negative electrode end cover 330c protruding from the circuit board 300c, so that the controller 400c can have a concave-shaped negative electrode.

[0329] In this embodiment, before installing the controller cover plate 460c and the cover plate light shielding ring 490c, the controller 400c has completed the structural sealing package, and the controller cover plate 460c does not belong to the sealing structure component of the controller 400c. In the case that the controller cover plate 460c is damaged, it does not affect the sealing structure of the controller 400c. In this way, the structural sealing protection level of the controller 400c is not reduced after the controller cover plate 460c is damaged.

[0330] In other embodiments, the indicator light may be an ultraviolet indicator light. Correspondingly, the controller cover 460c is made of a light-guiding material with fluorescent powder added thereto. The light from the ultraviolet lamp is irradiated on the controller cover 460c to excite the fluorescent powder to convert the ultraviolet light into visible light visible to the human eye, so that the outer side wall of the controller cover 460c forms a luminous surface.

[0331] In other embodiments, the controller 400c may not be provided with an indicator light. In this case, the controller cover 460c may be made of a common non-light-conducting insulating material.

[0332] In other embodiments, the controller 400c may not be provided with a cover light shielding film 490c. In this case, the other surface of the controller cover 460c relative to the surface receiving the light signal of the indicator light is coated or silk-screened with ink having reflective and / or light-shielding properties to reflect and block the light signal that penetrates the controller cover.

[0333] Combination Fig.60 As shown, a cell test point 316c is further provided in the annular area of ​​the first surface of the circuit board 300c that is not covered by the negative electrode terminal cover 330c. The cell test point 316c is exposed to the insulating layer 311c.

[0334] like Fig.57As shown, in the area of ​​the circuit board 300c covered by the cap body of the negative electrode end cap 330c, there are provided glue injection holes 302c and exhaust overflow holes 303c that penetrate the first surface and the second surface. The glue injection holes 302c and the exhaust overflow holes 303c are far apart. The aperture of the glue injection holes 302c is larger than the aperture of the exhaust overflow holes 303c. The cavity formed by the negative electrode end cap 330c and the first surface of the circuit board 300c is filled with thermal conductive glue through the glue injection holes 302c and the exhaust overflow holes 303c, so that the cavity formed by the side wall and bottom wall of the controller outer shell 410c and the second surface of the circuit board 300c is filled with thermal conductive glue 440c. As shown Fig.56 As shown, a layer of heat-conducting glue 440c is also formed between the bottom wall of the controller housing 410c and the negative electrode end cap 330c. The heat-conducting glue 440c can be a thermosetting colloid. The injected heat-conducting glue 440 conducts the heat generated by the control circuit in the controller 400c to the controller housing 410c and the negative electrode end cap 330c, so as to improve the heat dissipation efficiency of the controller 400c, reduce the temperature difference between the inside and outside of the controller 400c, improve the charging and discharging temperature control accuracy of the controller 400c, improve the structural strength of the controller 400c, and realize the structural sealing of the controller 400c, so as to effectively prevent the electrolyte from invading the electric controller 400c before the direct-sealed lithium-ion battery cell 200c fails. It can also improve the adaptability and reliability of the charging and discharging working environment of the rechargeable battery 100c.

[0335] In addition, in order to further prevent the electrolyte from infiltrating into the controller 400c when the direct-sealed lithium-ion battery cell 200c leaks, a sealant may be further covered on the thermal conductive adhesive 440c.

[0336] like Fig.58 As shown, after the thermal conductive adhesive 440c is poured and cured, a sealant 450c is poured into the gap groove formed by the controller outer shell 410c, the inner electrode 340c, and the thermal conductive adhesive 440c in a vacuum environment until the sealant plane reaches the following Fig.59 After reaching the position shown, take out the controller, put it into an oven for heating, soaking and leveling, and take it out to cool and solidify naturally after completion.

[0337] The sealant 450c can block the channel for the electrolyte to penetrate into the controller 400c, thereby preventing the electrolyte of the direct-sealed lithium-ion battery cell 200c from penetrating into the controller 400c and causing failure of the internal charging and / or discharging control circuit.

[0338] The sealant can be a thermoplastic plastic such as PP or PE that is resistant to electrolyte corrosion. The sealant 450c can be formed by injection molding PP or PE plastic into an annular plastic part, placing the injection-molded annular plastic part into a gap groove formed by the controller outer shell 410c, the inner electrode 340c, and the thermal conductive adhesive 440c, and then placing the controller component in a vacuum oven for heating, and after completing the hot melting, bubble extraction, infiltration, and leveling processes, taking it out and naturally cooling and solidifying it.

[0339] The sealant 450c may also be formed by placing the controller 400c into a mold and using an injection molding machine to directly inject PP or PE plastic into the gap groove formed by the controller outer shell 410c, the inner electrode 340c, and the thermal conductive adhesive 440c.

[0340] like Fig.56 As shown, the negative electrode end cap 330c is welded on the first surface of the circuit board 300c, and the inner electrode 340c is welded on the second surface of the circuit board 300c. The negative electrode end cap 330c, the circuit board 300c and the inner electrode 340c form a three-layer sandwich structure, that is, a control circuit assembly 350c is formed. The negative electrode end cap 330c and the inner electrode 340c are both formed with an inner cavity, in which all components on the first surface and some components on the second surface are accommodated, so that the components or devices on the circuit board are arranged compactly, the space is fully utilized, and the thickness of the controller is significantly reduced.

[0341] The first solder pad 321c of the circuit board 300c is electrically connected to the charging and / or discharging control circuit ground terminal GND. The first solder pad 321c of the circuit board 300c is electrically connected to the controller housing 410c by welding on the circuit board bracket 420c, so that the controller housing 410c is electrically connected to the charging and / or discharging control circuit ground terminal GND.

[0342] like Fig.56 As shown, the controller 400c is provided with three structural electrodes, namely, a negative electrode end cap 330c, an inner electrode 340c, and a controller outer shell 410c.

[0343] like Figure 20 to Figure 21 As shown, the bottom surface of the controller 400c facing the direct-sealed lithium-ion battery cell 200c is further provided with an insulating layer 470c, and the insulating layer 470c is annular, and its inner diameter is less than or equal to the through-hole diameter of the controller outer shell 410c, and its outer diameter is less than the outer diameter of the bottom wall of the controller outer shell 410c. The controller 400c is installed at one end of the direct-sealed lithium-ion battery cell 200c, so that the controller outer shell 410c is welded to the battery outer shell 110c, and the top edge of the battery outer shell 110c cooperates with the annular outer positioning groove 411c to achieve positioning.

[0344] In addition, the bottom of the controller 400c may not form an annular external positioning groove 411c, that is, the bottom may be a flat surface, and the flat surface may be covered with a layer of insulating shell positioning ring, the outer diameter of the shell positioning ring is smaller than the outer diameter of the bottom wall 413c of the controller outer shell 410c, so that the controller outer shell 410c and the outer peripheral edge wall of the shell positioning ring form an annular external positioning groove with an L-shaped cross-section.

[0345] Combination Fig.60 and Fig.61 As shown, the negative electrode end cap 330c is welded on the circuit board 300c and electrically connected to the charging input and discharging output terminals of the charge and discharge control circuit. The negative electrode end cap 330c exposes the platform structure axially outside the controller 400c and serves as the negative electrode of the charging input and discharging output of the rechargeable battery 100c in the rechargeable battery 100c.

[0346] Combination Fig.60 and Fig.61 As shown, the inner electrode 340c is welded on the circuit board 300c and electrically connected to the access end of the negative electrode 220c of the charge and discharge control circuit. The inner electrode 340c exposes the platform structure at the axial bottom of the controller 400c, serving as an electrode for electrically connecting the negative electrode 220c of the lithium-ion battery cell and detecting and controlling the charge and discharge of the direct-sealed lithium-ion battery cell 200c.

[0347] like Fig.18 , Fig. 20 , Fig.55 , Fig.56 As shown, the controller housing 410c is welded to the circuit board 300c and electrically connected to the charging and / or discharging control circuit ground terminal GND, serving as a common ground electrode electrically connected to the battery housing 110c and the lithium-ion battery cell positive electrode 210c, and serving as the positive electrode for the charging input and discharging output of the rechargeable battery 100c.

[0348] After the rechargeable battery 100c is assembled, the direct-sealed lithium-ion battery cell 200c can be formed and tested by the controller 400c.

[0349] If it is necessary to form and test the direct-sealed lithium-ion battery cell 200c across the controller 400c after the rechargeable battery 100c is assembled, the controller cover 460c may be not installed, such as Fig.23 and Fig.60 As shown, the cell test point 316c electrically connected to the negative electrode 220c on the circuit board 300c is connected to the lithium ion battery formation tester as the lithium ion cell negative electrode 220c for formation or testing.

[0350] The circuit components are formed on the first surface and the second surface of the circuit board 300c, respectively, and the components on the first surface are accommodated in the negative electrode end cap 340c, and the inner electrode 340c is arranged on the second surface of the circuit board 300c for connecting with the negative electrode of the aluminum shell lithium ion battery cell, thereby simplifying the structure of the controller 400c, reducing the material cost and manufacturing cost of the controller 400c, and the various components or devices on the circuit board 300c are arranged compactly, making full use of the internal space of the controller 400c, reducing the height of the controller 400c, making more space for the aluminum shell lithium ion battery cell, increasing the battery cell capacity, and increasing the volume specific energy of the rechargeable battery 100c. And improve the adaptability and reliability of the charging and discharging work of the rechargeable battery 100c.

[0351] In the above embodiments, the soft-pack lithium-ion battery (i.e., the rechargeable battery 100a) shown in Embodiment 1 is mainly composed of a battery outer shell 110a, a soft-pack lithium-ion battery cell 200a, and a controller 400a. It can be understood that Embodiment 1 is only an exemplary implementation. In other variable embodiments, the soft-pack lithium-ion battery can also use the controller 400b or 400c of Embodiment 2 or Embodiment 3. Similarly, the steel-shell lithium-ion battery can also use the controller 400a or 400c of Embodiment 1 or Embodiment 3.

[0352] In the above embodiments, the controller 400a adopts the structure of the inner electrode 340a. In other variable embodiments, the controller 400a may also adopt the structure of the inner electrode 340b or the inner electrode 340c. Similarly, the controller 400b may also adopt the structure of the inner electrode 340a or the inner electrode 340c; the controller 400c may also adopt the structure of the inner electrode 340a or the inner electrode 340b.

[0353] The present disclosure provides a battery, which can be the soft-pack lithium-ion battery, aluminum-shell lithium-ion battery or direct-sealed lithium-ion battery of the above-mentioned embodiments, or other types of batteries, comprising: a cylindrical battery outer shell, a lithium-ion battery cell installed in the battery outer shell, and a positive electrode cap arranged at one end of the battery outer shell, and the battery also comprises any one of the controllers 400a, 400b and 400c in the above-mentioned embodiments, the battery controller is installed at the other end of the battery outer shell relative to the positive electrode cap, the battery outer shell is connected to the controller shell of the battery controller, and the inner electrode of the battery controller is connected to the negative electrode of the lithium-ion battery cell.

[0354] An insulating sheet is pasted on the bottom surface of the controller housing facing the lithium-ion battery cell or an insulating layer is coated to isolate the controller housing from the inner electrode.

[0355] A closed end boss is formed at one end of the battery outer shell, and the closed end boss is connected to the positive electrode cap, or the closed end boss serves as the positive electrode cap. The closed end boss serves as the positive electrode cap or is a structure for connecting the positive electrode cap, and the closed end boss and the battery outer shell are integrally formed, which simplifies the battery structure and further reduces the material cost and process cost of the rechargeable battery.

[0356] Although the present disclosure has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A battery controller, characterized in that: include: A circuit board, comprising a first surface and a second surface arranged opposite to each other, wherein the first surface and the second surface are both provided with circuit components; A negative electrode end cap is made of a metal conductive material and is electrically connected to the circuit board. The negative electrode end cap includes a negative electrode end cap plate and a cap wall arranged around the negative electrode end cap plate. The negative electrode end cap plate and the cap wall constitute a cap body with a bottom opening. The cap body is inverted on the first surface of the circuit board. The circumferential bottom surface of the bottom opening of the cap body is in close contact with the circuit board. The cap body protrudes from the circuit board to form an inner cavity for accommodating the circuit components. The cap body covers part or all of the circuit components arranged on the first surface, so as to encapsulate part or all of the circuit components on the first surface in the inner cavity of the cap body. as well as The inner electrode is made of a conductive metal material and is fixed to the second surface of the circuit board. The inner electrode is electrically connected to the circuit board, and an accommodation space for arranging circuit components is formed between the inner electrode and the circuit board.

2. The battery controller according to claim 1, characterized in that: The negative electrode end cap is closed except for the bottom opening, and the cap body covers the first surface of the circuit board and forms a closed body with the circuit board.

3. The battery controller according to claim 2, characterized in that: The circuit board is a circular circuit board, the negative electrode end cap covers the middle area of ​​the first surface of the circuit board, the cap wall extends integrally along the axial direction to form at least two spaced-apart negative electrode end cap welding positioning feet, the circuit board is provided with a positioning groove for the negative electrode end cap welding positioning feet to be inserted, and the negative electrode end cap is electrically connected to the circuit board via the negative electrode end cap welding positioning feet.

4. The battery controller according to claim 3, characterized in that: A long strip tin guide groove is provided at the end of the negative electrode end cap welding positioning foot, and the outline of the tin guide groove is arch-shaped, so that the end of the negative electrode end cap welding positioning foot is forked.

5. The battery controller according to claim 1, characterized in that: The internal electrode includes: an internal electrode contact platform parallel to the circuit board and an internal electrode welding positioning foot connected to the internal electrode contact platform, the internal electrode welding positioning foot is fixed on the circuit board and electrically connected to the circuit board, and an accommodating space for arranging circuit components is formed between the internal electrode contact platform and the circuit board.

6. The battery controller according to claim 5, characterized in that: The number of the inner electrode welding positioning feet is two, namely a first positioning foot and a second positioning foot, and the first positioning foot and the second positioning foot both include: a positioning foot base connected to the inner electrode contact platform and a positioning foot welding part formed at one end of the positioning foot base for welding and connecting with the circuit board; The positioning foot welding part of the first positioning foot includes: two pin feet formed at the base of the positioning foot of the first positioning foot, which are spaced from each other and can be inserted into the circuit board, and a flat welding foot formed between the two pin feet and flatly attached to the surface of the circuit board, the flat welding foot is in a fork shape, and the circuit board is provided with positioning holes for the pin feet to be inserted respectively, and internal electrode pads for the flat welding feet to be flatly attached thereto and welded thereto, the internal electrode pad covers the periphery of the positioning hole, the pin foot and the flat welding foot of the first positioning foot share the same pad, and the positioning foot welding part of the second positioning foot is a pin foot formed at the base of the positioning foot of the second positioning foot.

7. The battery controller according to claim 6, characterized in that: The positioning foot bases of the first positioning foot and the second positioning foot are formed by bending and extending the corresponding inner electrode contact platform in an integral manner, and the positioning foot bases are in a step shape.

8. The battery controller according to claim 5, characterized in that: The periphery of the inner electrode contact platform is integrally formed with a convex edge perpendicular to the inner electrode contact platform, and the inner electrode welding positioning foot is indirectly connected to the inner electrode contact platform through the convex edge.

9. The battery controller according to claim 5, characterized in that: A riveting hole is arranged at the center of the inner electrode contact platform, and an annular flange is arranged around the edge of the riveting hole and extends perpendicularly from the inner electrode contact platform toward the circuit board.

10. The battery controller according to claim 5, characterized in that: The inner electrode has an inner electrode welding positioning foot, the inner electrode contact platform is integrally formed with the inner electrode welding positioning foot, the inner electrode contact platform can be elastically bent relative to the inner electrode welding positioning foot, the inner electrode contact platform includes: a first bending portion and a second bending portion folded together, the second bending portion is overlapped under the first bending portion, and the second bending portion includes an inner electrode contact area with a circular or polygonal outer contour.

11. The battery controller according to claim 10, characterized in that: The inner electrode welding positioning foot includes: a positioning foot base connected to the inner electrode contact platform and a positioning foot welding portion arranged at one end of the positioning foot base, the positioning foot welding portion includes: two pin pins formed on the positioning foot base and spaced from each other and insertable into the circuit board, and a flat welding foot formed between the two pin pins and flatly attached to the surface of the circuit board, the flat welding foot is in a fork shape, and the positioning foot base is in a step shape.

12. The battery controller according to claim 1, characterized in that: Also includes: The controller housing is provided with an inner cavity, the circuit board is accommodated in the inner cavity, the controller housing is electrically connected to the circuit board, the first surface of the circuit board faces the top of the controller housing, the negative electrode end cover protrudes from the top opening of the controller housing, the second surface of the circuit board faces the bottom of the controller housing, a through hole is opened at the bottom of the controller housing, the inner electrode is exposed through the through hole to be electrically connected to the negative electrode of the lithium-ion battery cell.

13. The battery controller according to claim 12, characterized in that: The inner electrode is used to electrically connect to the negative electrode of the lithium-ion battery cell. The circuit board is provided with an outer shell welding pad for welding the controller outer shell. The controller outer shell is used to electrically connect to the positive electrode of the lithium-ion battery cell.

14. The battery controller according to claim 13, characterized in that: The controller outer shell includes a cylindrical side wall, and the circuit board is suspended in an inner cavity surrounded by the side wall; a limiting boss formed of a conductive metal material is protruding from the inner surface of the side wall, and the periphery of the circuit board is mounted on the limiting boss, and an outer shell pad for conductively welding the limiting boss is provided at the position where the circuit board contacts the limiting boss.

15. The battery controller according to claim 14, characterized in that: The limiting boss is an annular platform integrally formed and protruding from the inner surface of the side wall, and the annular platform has an annular supporting plane protruding from the inner surface of the side wall for supporting the circuit board.

16. The battery controller according to claim 12, characterized in that: The controller housing includes a cylindrical side wall, and the circuit board is suspended in an inner cavity surrounded by the side wall; The controller outer shell also includes: a bottom wall formed at one end of the side wall and perpendicular to the side wall, a through hole is arranged at the center of the bottom wall, the inner electrode includes an inner electrode contact platform and an inner electrode welding positioning foot connected to the inner electrode contact platform, the inner electrode contact platform of the inner electrode is exposed to the outside of the controller outer shell via the through hole, and there is a gap between the edge of the inner electrode contact platform and the edge of the through hole.

17. The battery controller according to claim 16, characterized in that: A circuit board bracket is arranged in the controller housing, and the circuit board bracket includes: an annular bracket side wall attached to the inner surface of the side wall of the controller housing and an annular flat bottom formed at one end of the bracket side wall and attached to the inner surface of the bottom wall of the controller housing, the through hole in the center of the flat bottom is not smaller than the through hole on the bottom wall of the controller housing, a plurality of welding holes for welding the side wall of the controller housing are arranged on the bracket side wall, and the top surface of the bracket side wall forms a limiting boss on the inner surface of the side wall of the controller housing.

18. The battery controller according to claim 12, characterized in that: The bottom edge of the controller outer shell is provided with an annular outer positioning groove, and the cross section of the outer positioning groove is L-shaped.

19. The battery controller according to claim 12, characterized in that: A shell positioning ring is arranged at the bottom of the controller outer shell, and the shell positioning ring is arranged concentrically with the through hole of the controller outer shell. The outer diameter of the shell positioning ring is smaller than the outer diameter of the bottom wall of the controller outer shell, so that the shell positioning ring and the controller outer shell form an annular outer positioning groove.

20. The battery controller according to claim 14, characterized in that: The edge line of the outer shell pad for welding the limiting boss at the periphery of the circuit board is connected in a circle on the circuit board, and the edge line of the outer shell pad is composed of multiple arc segments, each arc segment is an arc that arches inward toward the center of the circuit board or an arc that arches outward away from the center of the circuit board.

21. The battery controller according to claim 14, characterized in that: The outer shell pads are a plurality of discrete pads arranged at intervals and distributed around the edge of the circuit board, and the edge line of each discrete pad is in an arc shape that arches inward toward the center of the circuit board.

22. The battery controller according to claim 2, characterized in that: An annular area is formed at the part of the first surface of the circuit board not covered by the cap body, and the annular area is covered with a controller cover plate made of insulating material, and the controller cover plate surrounds the cap body circumference of the negative electrode end cap.

23. The battery controller according to claim 22, characterized in that: An indicator light is arranged in the annular area and / or in a position corresponding to the annular area on the second surface of the circuit board, and the controller cover is made of a light-guiding material so that the light emitted by the indicator light forms an annular aperture. A battery cell test point is arranged in the annular area, and the controller cover covers the battery cell test point.

24. The battery controller according to claim 23, characterized in that: A plurality of light-transmitting holes are arranged in the annular area, and the light-transmitting holes pass through the first surface and the second surface of the circuit board. The controller cover covers each of the light-transmitting holes. The indicator lights are arranged at positions corresponding to each of the light-transmitting holes on the second surface of the circuit board. The light emitted by the indicator lights is guided to the controller cover through the light-transmitting holes, and the light-transmitting holes are filled with light-guiding glue.

25. The battery controller according to claim 24, characterized in that: Indicator light pads are arranged around each light-transmitting hole on the second surface of the circuit board. The indicator light is a sheet-shaped LED lamp. The LED lamp is reversely soldered to the second surface of the circuit board and covers the light-transmitting hole, and the light-emitting surface of the LED lamp faces the light-transmitting hole.

26. The battery controller according to claim 23, characterized in that: A plurality of sheet-shaped LED lamps are arranged in an annular area formed on the first surface of the circuit board not covered by the cap body, and a clearance groove for accommodating the LED lamps is arranged on the controller cover.

27. The battery controller according to claim 23, characterized in that: The indicator light is an ultraviolet indicator light, and the controller cover is made of a light-guiding material added with fluorescent powder.

28. The battery controller according to any one of claims 23 to 27, characterized in that: The controller cover is also covered with a cover shading sheet or coated with a cover shading layer, and the first surface of the circuit board is coated with an insulating layer of a reflective and insulating material.

29. The battery controller according to claim 16, characterized in that: A glue injection hole and an exhaust overflow hole penetrating the first surface and the second surface are provided in the area of ​​the circuit board covered by the cap body of the negative electrode end cap, the glue injection hole and the exhaust overflow hole are far apart, the aperture of the glue injection hole is larger than the aperture of the exhaust overflow hole, the cavity formed by the negative electrode end cap and the first surface of the circuit board is filled with thermal conductive glue through the glue injection hole and the exhaust overflow hole, and the cavity formed by the side wall and bottom wall of the controller outer shell and the second surface of the circuit board is filled with thermal conductive glue.

30. The battery controller according to claim 29, characterized in that The surface of the heat-conducting adhesive at the through hole of the controller outer shell is covered with sealing adhesive.

31. A battery, characterized in that: include: A cylindrical battery shell, a lithium-ion battery cell installed in the battery shell and a positive electrode cap arranged at one end of the battery shell, the battery also includes a battery controller as described in any one of claims 1-30, the battery controller also includes a controller shell, the circuit board is located in the controller shell, the battery controller is installed at the other end of the battery shell opposite to the positive electrode cap, the battery shell is connected to the controller shell of the battery controller, the inner electrode of the battery controller is connected to the negative electrode of the lithium-ion battery cell, and the positive electrode of the lithium-ion battery cell is electrically connected to the positive electrode cap.

32. The battery according to claim 31, characterized in that An insulating sheet is attached to the bottom surface of the controller housing facing the lithium-ion battery cell or an insulating layer is coated on the bottom surface.

33. The battery according to claim 31, characterized in that The controller housing and the battery housing are both made of aluminum. One end of the battery housing forms a closed end boss, which is the positive electrode cap, or the positive electrode cap is sleeved on the closed end boss.

34. The battery according to claim 31, characterized in that The controller outer shell and the battery outer shell are both made of stainless steel or nickel-plated metal material. One end of the battery outer shell forms a closed end boss, and the closed end boss is the positive electrode cap.

35. A soft-pack lithium-ion battery, characterized in that: include: A cylindrical battery shell, a soft-pack lithium-ion battery cell installed in the battery shell, and a positive electrode cap arranged at one end of the battery shell, wherein the positive electrode cap is electrically connected to the positive electrode of the soft-pack lithium-ion battery cell, the soft-pack lithium-ion battery further comprises a battery controller according to any one of claims 1-8 and 10-30, the battery controller further comprises a controller shell, the circuit board is located in the controller shell, and the battery controller is mounted on the other end of the battery shell opposite to the positive electrode cap; The soft-pack lithium-ion battery cell is filled with electrolyte and has an insulating film sealed on the surface. The opposite ends of the soft-pack lithium-ion battery cell respectively have a positive electrode and a negative electrode exposed outside the battery cell package. The positive electrode of the soft-pack lithium-ion battery cell is bent toward one end of the negative electrode and extended to the open end of the battery outer shell, and is welded and fixed to the battery outer shell at the open end to establish an electrical connection. The battery outer shell is connected to the controller outer shell, and the inner electrode of the battery controller is connected to the negative electrode of the soft-pack lithium-ion battery cell.

36. An aluminum shell lithium ion battery, characterized in that: include: A cylindrical battery shell, an aluminum shell lithium ion battery cell installed in the battery shell, and a positive electrode cap connected to one end of the battery shell, wherein the positive electrode cap is electrically connected to the positive electrode of the aluminum shell lithium ion battery cell, the aluminum shell lithium ion battery further comprises a battery controller according to any one of claims 1 to 30, the battery controller further comprises a controller shell, the circuit board is located in the controller shell, and the battery controller is mounted on the other end of the battery shell opposite to the positive electrode cap; The aluminum shell lithium ion battery cell comprises a battery cap and an aluminum shell lithium ion battery core, the aluminum shell lithium ion battery core is sleeved in the battery shell, the battery shell is filled with electrolyte, the battery cap is arranged at the open end of the battery shell and closes the opening of the battery shell, the battery controller is sleeved with the battery cap, the battery cap comprises a circular battery cap shell in the shape of a flat bottom cover and a lead-out electrode of a conductive material riveted on the battery cap shell, the battery cap shell comprises a circular cover The lead electrode is riveted at the center of the cover bottom and passes through the cover bottom, the battery outer shell is made of aluminum, the cover bottom of the battery cell cap shell is made of insulating material, the cover edge is made of conductive material, the cover edge connects the battery outer shell and the controller outer shell, the lead electrode is exposed on one side of the battery cell cap shell and is electrically connected to the negative electrode of the aluminum shell lithium ion battery cell roll core, and the lead electrode is located on one side inside the battery cell cap shell and contacts and is electrically connected to the internal electrode of the battery controller.

37. A directly sealed lithium ion battery, characterized in that: include: A cylindrical battery shell, a directly sealed lithium-ion battery cell installed in the battery shell, and a positive electrode cap arranged at one end of the battery shell, wherein the positive electrode cap is electrically connected to the positive electrode of the directly sealed lithium-ion battery cell, the directly sealed lithium-ion battery further comprises a battery controller according to any one of claims 1-8, 10-30, the battery controller further comprises a controller shell, the circuit board is located in the controller shell, the battery controller is installed at the other end of the battery shell opposite to the positive electrode cap, the controller shell is connected to the battery shell, and the inner electrode of the battery controller is connected to the negative electrode of the directly sealed lithium-ion battery cell; The battery controller is arranged at the open end of the battery outer shell and directly closes the opening of the battery outer shell, the circuit board is welded to the annular top surface of the circuit board bracket facing the negative electrode end cover, and the inner electrode on the second surface of the circuit board protrudes from the through hole of the circuit board bracket and the through hole of the controller outer shell to be connected to the negative electrode of the direct-sealed lithium-ion battery cell.

38. The directly sealed lithium ion battery according to claim 37, characterized in that: The circuit board bracket in the controller housing is made of nickel-plated aluminum, and both the controller housing and the battery housing are formed of aluminum.

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